JP2003077476A - Lithium ion secondary battery - Google Patents
Lithium ion secondary batteryInfo
- Publication number
- JP2003077476A JP2003077476A JP2001265288A JP2001265288A JP2003077476A JP 2003077476 A JP2003077476 A JP 2003077476A JP 2001265288 A JP2001265288 A JP 2001265288A JP 2001265288 A JP2001265288 A JP 2001265288A JP 2003077476 A JP2003077476 A JP 2003077476A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- positive electrode
- negative electrode
- ion secondary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はリチウムイオン二次
電池に関するものである。TECHNICAL FIELD The present invention relates to a lithium ion secondary battery.
【０００２】[0002]
【従来の技術】近年、携帯電話、携帯情報端末等の携帯
電子機器の性能は、搭載される半導体素子、電子回路だ
けでなく充電可能な二次電池に大きく依存しており、搭
載電池の容量アップと共に、軽量・コンパクト化を同時
に実現することが望まれている。これまでこれら電池に
は、鉛電池やニッケルカドミウム電池が用いられてきた
が、エネルギー密度不足で軽量・コンパクト化に対応す
ることが困難であった。2. Description of the Related Art In recent years, the performance of mobile electronic devices such as mobile phones and personal digital assistants largely depends not only on the mounted semiconductor elements and electronic circuits but also on the rechargeable secondary battery. At the same time, it is desired to realize both weight reduction and compactness. Up to now, lead batteries and nickel-cadmium batteries have been used for these batteries, but it was difficult to cope with weight reduction and compactness because of insufficient energy density.
【０００３】そこで、ニッケルカドミウム電池の約２倍
のエネルギー密度を有するニッケル水素電池が開発さ
れ、次いでそれを上回るリチウムイオン二次電池が開発
され、脚光を浴びている。Therefore, a nickel-hydrogen battery having an energy density about twice that of a nickel-cadmium battery has been developed, and then a lithium-ion secondary battery having a higher energy density than that has been developed and is in the spotlight.
【０００４】[0004]
【発明が解決しようとする課題】これらリチウムイオン
二次電池において、携帯電話または携帯情報端末等に使
用されるため、高容量化、レート特性の良好な電池が切
望されている。レート特性を向上させるためには、正極
層及び又は負極層中に導電材としてのカーボンブラック
を多く含有させれば良いが、カーボンブラックの量を多
くすると、正極層又は負極層中に占める活物質の割合が
減少するため、放電容量が低下する。Since these lithium ion secondary batteries are used in mobile phones, portable information terminals, etc., there is a strong demand for batteries with high capacity and good rate characteristics. In order to improve the rate characteristics, a large amount of carbon black as a conductive material may be contained in the positive electrode layer and / or the negative electrode layer. However, if the amount of carbon black is increased, the active material occupying in the positive electrode layer or the negative electrode layer is increased. , The discharge capacity decreases.
【０００５】本発明は、上記従来の課題を考慮し、レー
ト特性が良好であってかつ放電容量が低下しないリチウ
ムイオン二次電池を提供することを目的とする。In view of the above conventional problems, it is an object of the present invention to provide a lithium ion secondary battery which has good rate characteristics and does not reduce discharge capacity.
【０００６】[0006]
【課題を解決するための手段】第１の本発明（請求項１
に対応）は、正極板と、正極層と、電解質層と、負極層
と、負極板とがこの順で配置されたリチウムイオン二次
電池において、前記正極層には正極活物質と導電材とバ
インダーとが含まれており、前記導電材がカーボンナノ
チューブであるリチウムイオン二次電池である。[Means for Solving the Problems] The first invention (Claim 1)
Is a lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, and the positive electrode layer contains a positive electrode active material and a conductive material. A lithium ion secondary battery containing a binder and the conductive material being carbon nanotubes.
【０００７】第２の本発明（請求項２に対応）は、前記
正極層中の前記カーボンナノチューブの含有量が、前記
正極活物質１００重量部に対して、０．１重量部以上、
３重量部以下である第１の本発明に記載のリチウムイオ
ン二次電池である。In a second aspect of the present invention (corresponding to claim 2), the content of the carbon nanotubes in the positive electrode layer is 0.1 parts by weight or more based on 100 parts by weight of the positive electrode active material.
The lithium ion secondary battery according to the first aspect of the present invention has a content of 3 parts by weight or less.
【０００８】第３の本発明（請求項３に対応）は、正極
板と、正極層と、電解質層と、負極層と、負極板とがこ
の順で配置されたリチウムイオン二次電池において、前
記正極板と前記正極層との間に配置された接着層を備
え、その接着層がカーボンナノチューブとバインダーと
を含有するリチウムイオン二次電池である。A third aspect of the present invention (corresponding to claim 3) is a lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order. A lithium ion secondary battery including an adhesive layer disposed between the positive electrode plate and the positive electrode layer, the adhesive layer containing carbon nanotubes and a binder.
【０００９】第４の本発明（請求項４に対応）は、前記
接着層中の前記カーボンナノチューブの含有量が、前記
バインダー１００重量部に対して、５重量部以上、１０
０重量部以下である第３の本発明に記載のリチウムイオ
ン二次電池である。In a fourth aspect of the present invention (corresponding to claim 4), the content of the carbon nanotubes in the adhesive layer is 5 parts by weight or more based on 100 parts by weight of the binder.
The lithium-ion secondary battery according to the third aspect of the present invention has an amount of 0 parts by weight or less.
【００１０】第５の本発明（請求項５に対応）は、正極
板と、正極層と、電解質層と、負極層と、負極板とがこ
の順で配置されたリチウムイオン二次電池において、前
記負極層には負極活物質と導電材とバインダーとが含ま
れており、前記導電材がカーボンナノチューブであるリ
チウムイオン二次電池である。A fifth aspect of the present invention (corresponding to claim 5) is a lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, The negative electrode layer contains a negative electrode active material, a conductive material, and a binder, and the conductive material is a carbon nanotube.
【００１１】第６の本発明（請求項６に対応）は、前記
負極層中の前記カーボンナノチューブの含有量が、前記
負極活物質１００重量部に対して、０．１重量部以上、
３重量部以下である第５の本発明に記載のリチウムイオ
ン二次電池である。In a sixth aspect of the present invention (corresponding to claim 6), the content of the carbon nanotubes in the negative electrode layer is 0.1 part by weight or more based on 100 parts by weight of the negative electrode active material.
The lithium ion secondary battery according to the fifth aspect of the present invention, which is 3 parts by weight or less.
【００１２】第７の本発明（請求項７に対応）は、正極
板と、正極層と、電解質層と、負極層と、負極板とがこ
の順で配置されたリチウムイオン二次電池において、前
記負極板と前記負極層との間に配置された接着層を備
え、その接着層がカーボンナノチューブとバインダーと
を含有するリチウムイオン二次電池である。A seventh aspect of the present invention (corresponding to claim 7) is a lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, A lithium ion secondary battery including an adhesive layer disposed between the negative electrode plate and the negative electrode layer, the adhesive layer containing carbon nanotubes and a binder.
【００１３】第８の本発明（請求項８に対応）は、前記
接着層中の前記カーボンナノチューブの含有量が、前記
バインダー１００重量部に対して、５重量部以上、１０
０重量部以下である第７の本発明に記載のリチウムイオ
ン二次電池である。In an eighth aspect of the present invention (corresponding to claim 8), the content of the carbon nanotubes in the adhesive layer is 5 parts by weight or more based on 100 parts by weight of the binder.
The lithium-ion secondary battery according to the seventh aspect of the present invention, which is 0 part by weight or less.
【００１４】上述したように、正極層、負極層又は接着
層中に電子伝導性の良好なカーボンナノチューブを含有
させることにより、集電体の電気抵抗が下がりレート特
性を向上させさせることができる。As described above, by incorporating carbon nanotubes having good electron conductivity into the positive electrode layer, the negative electrode layer or the adhesive layer, the electrical resistance of the current collector can be reduced and the rate characteristics can be improved.
【００１５】[0015]
【発明の実施の形態】以下に、本発明の実施の形態を図
面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１６】（実施の形態１）先ず、本発明の実施の形
態１のリチウムイオン二次電池を説明する。(Embodiment 1) First, a lithium ion secondary battery according to Embodiment 1 of the present invention will be described.
【００１７】図１に、本発明の実施の形態１のリチウム
イオン二次電池の構成を示す。図１に示すように、本実
施の形態１のリチウムイオン二次電池は、正極板１と、
正極層２と、電解質層３と、負極層４と、負極板５とが
この順で配置された構造をしている。正極板１は、アル
ミニウム箔またはアルミニウム製網体等で構成される。
負極板５は、例えば銅箔または銅製網体で構成される。FIG. 1 shows the configuration of the lithium ion secondary battery according to the first embodiment of the present invention. As shown in FIG. 1, the lithium-ion secondary battery of Embodiment 1 includes a positive electrode plate 1 and
The positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4, and the negative electrode plate 5 are arranged in this order. The positive electrode plate 1 is composed of an aluminum foil, an aluminum net body, or the like.
The negative electrode plate 5 is composed of, for example, a copper foil or a net made of copper.
【００１８】次に、正極層２、負極層４について説明す
る。Next, the positive electrode layer 2 and the negative electrode layer 4 will be described.
【００１９】正極層２は、正極活物質、導電材としての
カーボンナノチューブ、非水電解液、及びバインダーを
含有する。The positive electrode layer 2 contains a positive electrode active material, carbon nanotubes as a conductive material, a non-aqueous electrolytic solution, and a binder.
【００２０】前記正極活物質としては、例えばリチウム
マンガン複合酸化物、二酸化マンガン、リチウム含有ニ
ッケル酸化物、リチウム含有コバルト酸化物、リチウム
含有コバルトニッケル酸化物、リチウムを含む非晶質五
酸化バナジウムのような種々の酸化物、二硫化チタン、
二硫化モリブデン等を用いることができる。Examples of the positive electrode active material include lithium manganese oxide, manganese dioxide, lithium-containing nickel oxide, lithium-containing cobalt oxide, lithium-containing cobalt nickel oxide, and lithium-containing amorphous vanadium pentoxide. Various oxides, titanium disulfide,
Molybdenum disulfide or the like can be used.
【００２１】また、前記電解液は、非水溶媒に電解質を
溶解することにより調整される。前記非水溶媒として
は、例えばエチレンカーボネート、プロピレンカーボネ
ート、ブチレンカーボネート、ジメチルカーボネート、
ジエチルカーボネート、γーブチロラクトン、スルホラ
ン、アセトニトリル、１，２−ジメトキエタン、１，３
−ジメトキシプロパン、ジエチルエーテル、テトラヒド
ロフラン、２−メチルテトラヒドロフラン、γーブチロ
ラクトン等を挙げることができる。前記非水溶媒は、単
独で使用しても、２種以上混合して使用してもよい。The electrolytic solution is prepared by dissolving the electrolyte in a non-aqueous solvent. Examples of the non-aqueous solvent include ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate,
Diethyl carbonate, γ-butyrolactone, sulfolane, acetonitrile, 1,2-dimethoethane, 1,3
-Dimethoxypropane, diethyl ether, tetrahydrofuran, 2-methyltetrahydrofuran, γ-butyrolactone and the like can be mentioned. The non-aqueous solvent may be used alone or in combination of two or more.
【００２２】前記非水電解液に含まれる電解質として
は、例えば過塩素酸リチウム（ＬｉＣｌＯ4）、六フッ
化リン酸リチウム（ＬｉＰＦ6）、ホウフッ化リチウム
（ＬｉＢＦ4）、六フッ化砒素リチウム（ＬｉＡｓ
Ｆ6）、トリフルオロメタスルホン酸リチウム（ＬｉＣ
Ｆ3ＳＯ3）、ビストリフルオロメチルスルホニルイミド
リチウム［ＬｉＮ（ＣＦ3ＳＯ2）2］等のリチウム塩が
挙げられる。As the electrolyte contained in the non-aqueous electrolyte, for example, lithium perchlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium borofluoride (LiBF 4 ), lithium arsenic hexafluoride ( LiAs
F 6 ), lithium trifluorometasulfonate (LiC
F 3 SO 3), bis (trifluoromethylsulfonyl) imide lithium [LiN (CF 3 SO 2) 2] lithium salts such as.
【００２３】前記バインダーとしては、例えばポリビニ
リデンジフロライド（ＰＶｄＦ）、アクリル系樹脂、ア
クリル系ゴム、スチレン−ブタジエンゴム、フッ素系ゴ
ム、ビニリデンフロライド−ヘキサフルオロプロピレン
（ＶＤＦ−ＨＦＰ）の共重合体を用いることができる。
ＶＤＦは共重合体の骨格部で機械的強度の向上に寄与
し、ＨＦＰは前記共重合体に非晶質として取り込まれ、
前記電解液の保持とリチウムイオンの透過部として機能
する。またこれらバインダーは単体としても２種類以上
混合させても良い。As the binder, for example, polyvinylidene difluoride (PVdF), acrylic resin, acrylic rubber, styrene-butadiene rubber, fluorine rubber, vinylidene fluoride-hexafluoropropylene (VDF-HFP) co-weight Coalescence can be used.
VDF contributes to the improvement of the mechanical strength in the skeleton of the copolymer, and HFP is incorporated into the copolymer as amorphous,
It functions as a holding part of the electrolyte and a lithium ion permeation part. These binders may be used alone or in a mixture of two or more kinds.
【００２４】負極層４は、リチウムイオンを吸蔵する負
極活物質としての炭素系材料、非水電解液、及びバイン
ダーで構成される。The negative electrode layer 4 is composed of a carbon-based material as a negative electrode active material that occludes lithium ions, a non-aqueous electrolyte, and a binder.
【００２５】負極活物質としての前記炭素系材料として
は、例えば有機高分子化合物（例えば、フェノール樹
脂、ポリアクリロニトリル、セルロース等）を焼成する
ことにより得られるもの、コークスやピッチを焼成する
ことにより得られるもの、または人造グラファイト、天
然グラファイト等を挙げることができる。前記非水電解
液、結合材樹脂は前述した正極層２で説明したものと同
様のものが用いられる。Examples of the carbonaceous material as the negative electrode active material include those obtained by firing an organic polymer compound (eg, phenol resin, polyacrylonitrile, cellulose), and those obtained by firing coke or pitch. Examples thereof include artificial graphite, natural graphite, and the like. The same non-aqueous electrolyte solution and binder resin as those described for the positive electrode layer 2 are used.
【００２６】上述したように、本実施の形態１のリチウ
ムイオン二次電池は、正極層２が導電材としてカーボン
ナノチューブを含有しているので、レート特性が向上
し、放電容量は低下しない。ここで、正極層２中のカー
ボンナノチューブの含有量は、正極活物質１００重量部
に対して、０．１重量部以上、３重量部以下であること
が望ましい。As described above, in the lithium-ion secondary battery of Embodiment 1, since the positive electrode layer 2 contains carbon nanotubes as the conductive material, the rate characteristics are improved and the discharge capacity is not reduced. Here, the content of carbon nanotubes in the positive electrode layer 2 is preferably 0.1 parts by weight or more and 3 parts by weight or less with respect to 100 parts by weight of the positive electrode active material.
【００２７】なお、上述した実施の形態では、正極層２
に導電材としてカーボンナノチューブが含有されている
としたが、正極層２にではなく負極層４に、又は正極層
２とともに負極層４に、導電材としてカーボンナノチュ
ーブが含有されているとしてもよい。その場合であって
も、レート特性は向上し、放電容量は低下しない。ま
た、負極層４中のカーボンナノチューブの含有量は、負
極活物質１００重量部に対して、０．１重量部以上、３
重量部以下であることが望ましい。In the above-described embodiment, the positive electrode layer 2
Although carbon nanotubes are contained as the conductive material in the above, carbon nanotubes may be contained as the conductive material not in the positive electrode layer 2 but in the negative electrode layer 4 or together with the positive electrode layer 2 in the negative electrode layer 4. Even in that case, the rate characteristic is improved and the discharge capacity is not reduced. The content of the carbon nanotubes in the negative electrode layer 4 is 0.1 parts by weight or more and 3 parts by weight or more with respect to 100 parts by weight of the negative electrode active material.
It is desirable that the amount is less than or equal to parts by weight.
【００２８】（実施の形態２）次に、本発明の実施の形
態２のリチウムイオン二次電池を説明する。(Second Embodiment) Next, a lithium ion secondary battery according to a second embodiment of the present invention will be described.
【００２９】図２に、本発明の実施の形態２のリチウム
イオン二次電池の構成を示す。図２に示すように、本実
施の形態２のリチウムイオン二次電池は、正極板１と、
接着層６と、正極層２と、電解質層３と、負極層４と、
負極板５とがこの順で配置された構造をしている。FIG. 2 shows the structure of the lithium ion secondary battery according to the second embodiment of the present invention. As shown in FIG. 2, the lithium ion secondary battery according to the second embodiment includes a positive electrode plate 1,
An adhesive layer 6, a positive electrode layer 2, an electrolyte layer 3, a negative electrode layer 4,
The negative electrode plate 5 and the negative electrode plate 5 are arranged in this order.
【００３０】正極板１、正極層２、電解質層３、負極層
４、及び負極板５については実施の形態１で説明したの
で詳細な説明は省略するが、実施の形態１では、正極層
２又は負極層４には導電材としてカーボンナノチューブ
が含有されているとしたが、実施の形態２では、正極層
２又は負極層４には導電材としてカーボンブラックが含
有されている点が、実施の形態１と実施の形態２のリチ
ウムイオン二次電池の相違点である。The positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4, and the negative electrode plate 5 have been described in the first embodiment, and detailed description thereof will be omitted. However, in the first embodiment, the positive electrode layer 2 is used. Alternatively, the negative electrode layer 4 is described as containing carbon nanotubes as a conductive material, but in the second embodiment, the positive electrode layer 2 or the negative electrode layer 4 contains carbon black as a conductive material. This is a difference between the lithium ion secondary batteries of the first embodiment and the second embodiment.
【００３１】接着層６は、カーボンナノチューブ、バイ
ンダーで構成される。バインダーは実施の形態１で説明
した物が用いられる。The adhesive layer 6 is composed of carbon nanotubes and a binder. As the binder, the one described in Embodiment 1 is used.
【００３２】このように、本実施の形態２のリチウムイ
オン二次電池は、接着層６がカーボンナノチューブを含
有しているので、レート特性が向上し、放電容量は低下
しない。ここで、接着層６中のカーボンナノチューブの
含有量は、バインダー１００重量部に対して、５重量部
以上、１００重量部以下であることが望ましい。As described above, in the lithium ion secondary battery of Embodiment 2, since the adhesive layer 6 contains the carbon nanotubes, the rate characteristic is improved and the discharge capacity is not lowered. Here, the content of carbon nanotubes in the adhesive layer 6 is preferably 5 parts by weight or more and 100 parts by weight or less with respect to 100 parts by weight of the binder.
【００３３】なお、上述した実施の形態では、正極板１
と正極層２との間に接着層６が設けられているとした
が、正極板１と正極層２との間には接着層６は設けられ
ておらず、又は正極板１と正極層２との間に接着層６が
設けられているととともに、負極板５と負極層４との間
に接着層６が設けられているとしてもよい。その場合で
あっても、レート特性は向上し、放電容量は低下しな
い。また、負極板５と負極層４との間に設けられる接着
層６中のカーボンナノチューブの含有量は、その接着層
６に含まれるバインダー１００重量部に対して、５重量
部以上、１００重量部以下であることが望ましい。In the above embodiment, the positive electrode plate 1
Although the adhesive layer 6 is provided between the positive electrode layer 2 and the positive electrode layer 2, the adhesive layer 6 is not provided between the positive electrode plate 1 and the positive electrode layer 2, or the positive electrode plate 1 and the positive electrode layer 2 are provided. The adhesive layer 6 may be provided between the negative electrode plate 5 and the negative electrode layer 4, and the adhesive layer 6 may be provided between the negative electrode plate 5 and the negative electrode layer 4. Even in that case, the rate characteristic is improved and the discharge capacity is not reduced. The content of carbon nanotubes in the adhesive layer 6 provided between the negative electrode plate 5 and the negative electrode layer 4 is 5 parts by weight or more and 100 parts by weight with respect to 100 parts by weight of the binder contained in the adhesive layer 6. The following is desirable.
【００３４】[0034]
【実施例】以下本発明の実施例を詳細に説明する。EXAMPLES Examples of the present invention will be described in detail below.
【００３５】（実施例１）実施例１のリチウムイオン二
次電池は、図１に示す正極板１、正極層２、電解質層
３、負極層４及び負極板５がこの順で配置されたリチウ
ムイオン二次電池である。(Example 1) The lithium ion secondary battery of Example 1 is a lithium in which the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 shown in FIG. 1 are arranged in this order. It is an ion secondary battery.
【００３６】正極層２は、以下のように作成した（以下
の組成は活物質であるリチウム含有コバルト酸１００重
量部に対する比率である。）。The positive electrode layer 2 was prepared as follows (the following composition is the ratio with respect to 100 parts by weight of lithium-containing cobalt acid as an active material).
【００３７】リチウム含有コバルト酸１００重量部と、
導電材であるカーボンナノチューブ（短軸長：０．０１
μｍ、長軸長：１μｍ）を１重量部、バインダーである
ポリビニリデンジフロライド（以下ＰＶｄＦ）を４重量
部、溶剤であるＮ−メチル−２−ピロリドン（以下ＮＭ
Ｐ）を４５重量部の比率で撹拌して正極塗料を得た。こ
の正極塗料をアルミ箔上にドクターブレードにて成膜
し、常温に静置して自然乾燥により厚さ１００μｍのシ
ート状正極を作成した。100 parts by weight of lithium-containing cobalt acid,
Carbon nanotubes that are conductive materials (minor axis length: 0.01
μm, major axis length: 1 μm), 1 part by weight, polyvinylidene difluoride (hereinafter PVdF), which is a binder, 4 parts by weight, N-methyl-2-pyrrolidone (hereinafter, NM), which is a solvent.
P) was stirred at a ratio of 45 parts by weight to obtain a positive electrode coating material. This positive electrode coating material was formed into a film on an aluminum foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped positive electrode having a thickness of 100 μm.
【００３８】負極層４は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode layer 4 was prepared as follows (the following composition is the ratio to 100 parts by weight of graphite carbon as an active material).
【００３９】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。この負極塗料を銅箔状にドク
ターブレードにて成膜し、常温に静置して自然乾燥にて
厚さ１５０μｍのシート状負極を作成した。100 parts by weight of graphite carbon (primary particle size: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. This negative electrode coating material was formed into a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped negative electrode having a thickness of 150 μm.
【００４０】次に、これらの正極層２と負極層４の間に
シート状電解質層３を介在させ、この積層物を、六フッ
化リン酸リチウム（ＬｉＰＦ6）がエチレンカーボネー
ト（ＥＣ）に１モル溶解された電解液に浸漬させること
によりリチウムイオン二次電池を作成した。Next, the sheet-like electrolyte layer 3 is interposed between the positive electrode layer 2 and the negative electrode layer 4, and this laminate is prepared by converting lithium hexafluorophosphate (LiPF 6 ) into ethylene carbonate (EC). A lithium ion secondary battery was prepared by immersing it in a mol dissolved electrolyte solution.
【００４１】（実施例２）実施例２のリチウムイオン二
次電池は、図２に示す正極板１、接着層６、正極層２、
電解質層３、負極層４及び負極板５がこの順で配置され
たリチウムイオン二次電池である。(Example 2) The lithium ion secondary battery of Example 2 has a positive electrode plate 1, an adhesive layer 6, a positive electrode layer 2 shown in FIG.
A lithium ion secondary battery in which the electrolyte layer 3, the negative electrode layer 4, and the negative electrode plate 5 are arranged in this order.
【００４２】正極層２は以下のように作成した。The positive electrode layer 2 was prepared as follows.
【００４３】リチウム含有コバルト酸（一次粒子径：５
μｍ）を１００重量部、カーボンブラック（一次粒子
径：０．０５μｍ）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobaltic acid (primary particle size: 5
μm), 100 parts by weight, carbon black (primary particle diameter: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００４４】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１０重量部
の比率で撹拌して接着層用塗料を作成した。その接着層
用塗料をアルミ箔上にドクターブレードにて成膜し、常
温に静置して自然乾燥にて厚さ２μｍのシート状接着層
６を作成した。次に前記正極塗料を接着層６上に塗布
し、１００μｍのシート状正極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 10 parts by weight of carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed into a film on an aluminum foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped adhesive layer 6 having a thickness of 2 μm. Next, the positive electrode coating material was applied onto the adhesive layer 6 to prepare a sheet-shaped positive electrode having a thickness of 100 μm.
【００４５】前述した以外は実施例１と同様にリチウム
イオン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００４６】（実施例３）実施例３のリチウムイオン二
次電池は、図１に示すような、正極板１、正極層２、電
解質層３、負極層４及び負極板５がこの順で配置された
リチウムイオン二次電池である。Example 3 In the lithium-ion secondary battery of Example 3, as shown in FIG. 1, the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 are arranged in this order. It is a rechargeable lithium-ion secondary battery.
【００４７】正極層２は以下のように作成した。The positive electrode layer 2 was prepared as follows.
【００４８】リチウム含有コバルト酸（一次粒子径：５
μｍ）を１００重量部、カーボンブラック（一次粒子
径：０．０５μｍ）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
μm), 100 parts by weight, carbon black (primary particle diameter: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００４９】負極層４は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode layer 4 was prepared as follows (the following composition is the ratio to 100 parts by weight of graphite carbon as an active material).
【００５０】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、導電材であるカー
ボンナノチューブを１重量部、バインダーであるＰＶｄ
Ｆを１０重量部と溶剤であるＮＭＰを１００重量部混合
し負極塗料を得た。この負極塗料を銅箔状にドクターブ
レードにて成膜し、常温に静置して自然乾燥にて厚さ１
５０μｍのシート状負極を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) which is an active material, 1 part by weight of carbon nanotube which is a conductive material, and PVd which is a binder.
10 parts by weight of F and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. A film of this negative electrode coating is formed on a copper foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 1
A 50 μm sheet-shaped negative electrode was prepared.
【００５１】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００５２】（実施例４）実施例４のリチウムイオン二
次電池は、正極板１、正極層２、電解質層３、負極層
４、接着層６及び負極板５がこの順で配置されたリチウ
ムイオン二次電池である。(Embodiment 4) The lithium ion secondary battery of Embodiment 4 is a lithium in which the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4, the adhesive layer 6 and the negative electrode plate 5 are arranged in this order. It is an ion secondary battery.
【００５３】正極層２は以下のように作成した。The positive electrode layer 2 was prepared as follows.
【００５４】リチウム含有コバルト酸（一次粒子径：５
μｍ）を１００重量部、カーボンブラック（一次粒子
径：０．０５μｍ）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
μm), 100 parts by weight, carbon black (primary particle diameter: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００５５】負極塗料は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode coating material was prepared as follows (the following composition is a ratio based on 100 parts by weight of graphite carbon as an active material).
【００５６】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material.
【００５７】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１０重量部
の比率で撹拌して接着層用塗料を作成した。その接着層
用塗料を銅箔上にドクターブレードにて成膜し、常温に
静置して自然乾燥にて厚さ２μｍのシート状接着層６を
作成した。次に前記負極塗料を接着層６上に塗布し、１
５０μｍのシート状負極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 10 parts by weight of carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed into a film on a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped adhesive layer 6 having a thickness of 2 μm. Next, the negative electrode coating material is applied onto the adhesive layer 6, and 1
A 50 μm sheet-shaped negative electrode was prepared.
【００５８】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００５９】（実施例５）リチウム含有コバルト酸１０
０重量部と導電材であるカーボンナノチューブ（短軸
長：０．０１μm、長軸長：１μm）を０．１重量部、バ
インダーであるポリビニリデンジフロライド（以下ＰＶ
ｄＦ）を４重量部、溶剤であるＮ−メチル−２−ピロリ
ドン（以下ＮＭＰ）を４５重量部の比率で撹拌して正極
塗料を得た。この正極塗料をアルミ箔上にドクターブレ
ードにて成膜し、常温に静置して自然乾燥により厚さ１
００μmのシート状正極を作成した。Example 5 Lithium-containing cobaltic acid 10
0 parts by weight, 0.1 parts by weight of carbon nanotubes (minor axis length: 0.01 μm, major axis length: 1 μm) that are conductive materials, and polyvinylidene difluoride (hereinafter PV) that is a binder.
4 parts by weight of dF) and 45 parts by weight of N-methyl-2-pyrrolidone (hereinafter NMP) as a solvent were stirred to obtain a positive electrode coating material. A film of this positive electrode coating is formed on an aluminum foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 1
A sheet-shaped positive electrode having a thickness of 00 μm was prepared.
【００６０】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００６１】（実施例６）リチウム含有コバルト酸１０
０重量部と導電材であるカーボンナノチューブ（短軸
長：０．０１μm、長軸長：１μm）を３重量部、バイン
ダーであるポリビニリデンジフロライド（以下ＰＶｄ
Ｆ）を４重量部、溶剤であるＮ−メチル−２−ピロリド
ン（以下ＮＭＰ）を４５重量部の比率で撹拌して正極塗
料を得た。この正極塗料をアルミ箔上にドクターブレー
ドにて成膜し、常温に静置して自然乾燥により厚さ１０
０μmのシート状正極を作成した。(Example 6) Lithium-containing cobalt acid 10
0 parts by weight and 3 parts by weight of carbon nanotubes (minor axis length: 0.01 μm, major axis length: 1 μm) that are conductive materials, and polyvinylidene difluoride (hereinafter PVd) that is a binder.
4 parts by weight of F) and 45 parts by weight of N-methyl-2-pyrrolidone (hereinafter NMP) as a solvent were stirred to obtain a positive electrode coating material. A film of this positive electrode coating is formed on an aluminum foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 10
A 0 μm sheet-shaped positive electrode was prepared.
【００６２】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００６３】（実施例７）負極層は以下のように作成し
た（以下の組成は活物質であるグラファイトカーボン１
００重量部に対する比率である。）。(Example 7) A negative electrode layer was prepared as follows (the following composition has an active material of graphite carbon 1).
It is the ratio to 00 parts by weight. ).
【００６４】活物質であるグラファイトカーボン（一次
粒子径：２０μm）を１００重量部、導電材であるカー
ボンナノチューブを０．１重量部、バインダーであるＰ
ＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量部
混合し負極塗料を得た。この負極塗料を銅箔状にドクタ
ーブレードにて成膜し、常温に静置して自然乾燥にて厚
さ１５０μmのシート状負極を作成した以外は実施例１
と同様にリチウムイオン二次電池を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) which is an active material, 0.1 part by weight of carbon nanotube which is a conductive material, and P which is a binder.
10 parts by weight of VdF and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. Example 1 except that this negative electrode coating material was formed into a copper foil with a doctor blade and allowed to stand at room temperature to naturally dry to form a sheet-shaped negative electrode with a thickness of 150 μm.
A lithium ion secondary battery was prepared in the same manner as in.
【００６５】（実施例８）負極層は以下のように作成し
た（以下の組成は活物質であるグラファイトカーボン１
００重量部に対する比率である。）。(Example 8) A negative electrode layer was prepared as follows (the following composition has an active material, graphite carbon 1).
It is the ratio to 00 parts by weight. ).
【００６６】活物質であるグラファイトカーボン（一次
粒子径：２０μm）を１００重量部、導電材であるカー
ボンナノチューブを３重量部、バインダーであるＰＶｄ
Ｆを１０重量部と溶剤であるＮＭＰを１００重量部混合
し負極塗料を得た。この負極塗料を銅箔状にドクターブ
レードにて成膜し、常温に静置して自然乾燥にて厚さ１
５０μmのシート状負極を作成した以外は実施例１と同
様にリチウムイオン二次電池を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) which is an active material, 3 parts by weight of carbon nanotube which is a conductive material, and PVd which is a binder
10 parts by weight of F and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. A film of this negative electrode coating is formed on a copper foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 1
A lithium ion secondary battery was prepared in the same manner as in Example 1 except that a sheet-shaped negative electrode having a thickness of 50 μm was prepared.
【００６７】（実施例９）正極層は以下のように作成し
た。Example 9 The positive electrode layer was prepared as follows.
【００６８】リチウム含有コバルト酸（一次粒子径：５
μm）を１００重量部、カーボンブラック（一次粒子
径：０．０５μm）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
100 parts by weight, carbon black (primary particle size: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００６９】接着層は以下のように作成した。バインダ
ー１００重量部と前記カーボンナノチューブを５重量部
の比率で撹拌して接着層用塗料を作成した。前記接着層
用塗料をアルミ箔上にドクターブレードにて成膜し、常
温に静置して自然乾燥にて厚さ２μmのシート状接着層
を作成した。次に前記正極塗料を接着層上に塗布し、１
００μmのシート状正極を作成した。The adhesive layer was prepared as follows. 100 parts by weight of the binder and 5 parts by weight of the carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed into a film on an aluminum foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-like adhesive layer having a thickness of 2 μm. Next, the positive electrode paint is applied onto the adhesive layer, and 1
A sheet-shaped positive electrode having a thickness of 00 μm was prepared.
【００７０】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００７１】（実施例１０）正極層は以下のように作成
した。Example 10 The positive electrode layer was prepared as follows.
【００７２】リチウム含有コバルト酸（一次粒子径：５
μm）を１００重量部、カーボンブラック（一次粒子
径：０．０５μm）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
100 parts by weight, carbon black (primary particle size: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００７３】接着層は以下のように作成した。バインダ
ー１００重量部と前記カーボンナノチューブを１００重
量部の比率で撹拌して接着層用塗料を作成した。前記接
着層用塗料をアルミ箔上にドクターブレードにて成膜
し、常温に静置して自然乾燥にて厚さ２μmのシート状
接着層を作成した。次に前記正極塗料を接着層上に塗布
し、１００μmのシート状正極を作成した。The adhesive layer was prepared as follows. 100 parts by weight of the binder and 100 parts by weight of the carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed into a film on an aluminum foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-like adhesive layer having a thickness of 2 μm. Next, the positive electrode coating material was applied onto the adhesive layer to prepare a sheet-shaped positive electrode having a thickness of 100 μm.
【００７４】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００７５】（実施例１１）正極層は以下のように作成
した。Example 11 A positive electrode layer was prepared as follows.
【００７６】リチウム含有コバルト酸（一次粒子径：５
μm）を１００重量部、カーボンブラック（一次粒子
径：０．０５μm）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
100 parts by weight, carbon black (primary particle size: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００７７】負極塗料は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode coating material was prepared as follows (the following composition is the ratio with respect to 100 parts by weight of graphite carbon as an active material).
【００７８】活物質であるグラファイトカーボン（一次
粒子径：２０μm）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material.
【００７９】接着層は以下のように作成した。バインダ
ー１００重量部と前記カーボンナノチューブを５重量部
の比率で撹拌して接着層用塗料を作成した。前記接着層
用塗料を銅箔上にドクターブレードにて成膜し、常温に
静置して自然乾燥にて厚さ２μmのシート状接着層を作
成した。次に前記負極塗料を接着層上に塗布し、１５０
μmのシート状負極を作成した以外は実施例１と同様に
リチウムイオン二次電池を作成した。The adhesive layer was prepared as follows. 100 parts by weight of the binder and 5 parts by weight of the carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed on a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped adhesive layer having a thickness of 2 μm. Next, the negative electrode coating material is applied onto the adhesive layer,
A lithium ion secondary battery was prepared in the same manner as in Example 1 except that a sheet-shaped negative electrode having a thickness of μm was prepared.
【００８０】（実施例１２）正極層は以下のように作成
した。Example 12 A positive electrode layer was prepared as follows.
【００８１】リチウム含有コバルト酸（一次粒子径：５
μm）を１００重量部、カーボンブラック（一次粒子
径：０．０５μm）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobaltic acid (primary particle size: 5
100 parts by weight, carbon black (primary particle size: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００８２】負極塗料は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode coating material was prepared as follows (the following composition is a ratio based on 100 parts by weight of graphite carbon which is an active material).
【００８３】活物質であるグラファイトカーボン（一次
粒子径：２０μm）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material.
【００８４】接着層は以下のように作成した。バインダ
ー１００重量部と前記カーボンナノチューブを１００重
量部の比率で撹拌して接着層用塗料を作成した。前記接
着層用塗料を銅箔上にドクターブレードにて成膜し、常
温に静置して自然乾燥にて厚さ２μmのシート状接着層
を作成した。次に前記負極塗料を接着層上に塗布し、１
５０μmのシート状負極を作成した以外は実施例１と同
様にリチウムイオン二次電池を作成した。The adhesive layer was prepared as follows. 100 parts by weight of the binder and 100 parts by weight of the carbon nanotubes were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed on a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped adhesive layer having a thickness of 2 μm. Next, the negative electrode paint is applied onto the adhesive layer, and 1
A lithium ion secondary battery was prepared in the same manner as in Example 1 except that a sheet-shaped negative electrode having a thickness of 50 μm was prepared.
【００８５】（比較例１）比較例１のリチウムイオン二
次電池は、図１に示すような、正極板１、正極層２、電
解質層３、負極層４及び負極板５がこの順で配置された
リチウムイオン二次電池である。Comparative Example 1 In the lithium-ion secondary battery of Comparative Example 1, as shown in FIG. 1, the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 are arranged in this order. It is a rechargeable lithium-ion secondary battery.
【００８６】正極層２は、以下のように作成した（以下
の組成は活物質であるリチウム含有コバルト酸１００重
量部に対する比率である。）。The positive electrode layer 2 was prepared as follows (the following composition is the ratio to 100 parts by weight of lithium-containing cobalt acid which is the active material).
【００８７】リチウム含有コバルト酸１００重量部と、
導電材であるカーボンナノチューブ（短軸長：０．０１
μｍ、長軸長：１μｍ）を０．０５重量部、バインダー
であるポリビニリデンジフロライド（以下ＰＶｄＦ）を
４重量部、溶剤であるＮ−メチル−２−ピロリドン（以
下ＮＭＰ）を４５重量部の比率で撹拌して正極塗料を得
た。この正極塗料をアルミ箔上にドクターブレードにて
成膜し、常温に静置して自然乾燥により厚さ１００μｍ
のシート状正極を作成した。100 parts by weight of lithium-containing cobalt acid,
Carbon nanotubes that are conductive materials (minor axis length: 0.01
μm, major axis length: 1 μm) 0.05 part by weight, polyvinylidene difluoride (hereinafter PVdF) as a binder 4 parts by weight, N-methyl-2-pyrrolidone (hereinafter NMP) as a solvent 45 parts by weight The positive electrode coating material was obtained by stirring at a ratio of. A film of this positive electrode coating is formed on an aluminum foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 100 μm.
A sheet-shaped positive electrode of was prepared.
【００８８】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００８９】（比較例２）比較例２のリチウムイオン二
次電池は、図１に示すような、正極板１、正極層２、電
解質層３、負極層４及び負極板５がこの順で配置された
リチウムイオン二次電池である。Comparative Example 2 In the lithium ion secondary battery of Comparative Example 2, as shown in FIG. 1, the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 are arranged in this order. It is a rechargeable lithium-ion secondary battery.
【００９０】正極層２は、以下のように作成した（以下
の組成は活物質であるリチウム含有コバルト酸１００重
量部に対する比率である。）。The positive electrode layer 2 was prepared as follows (the following composition is the ratio with respect to 100 parts by weight of lithium-containing cobalt acid which is an active material).
【００９１】リチウム含有コバルト酸１００重量部と、
導電材であるカーボンナノチューブ（短軸長：０．０１
μｍ、長軸長：１μｍ）を５重量部、バインダーである
ポリビニリデンジフロライド（以下ＰＶｄＦ）を４重量
部、溶剤であるＮ−メチル−２−ピロリドン（以下ＮＭ
Ｐ）を４５重量部の比率で撹拌して正極塗料を得た。こ
の正極塗料をアルミ箔上にドクターブレードにて成膜
し、常温に静置して自然乾燥により厚さ１００μｍのシ
ート状正極を作成した。100 parts by weight of lithium-containing cobalt acid,
Carbon nanotubes that are conductive materials (minor axis length: 0.01
μm, major axis length: 1 μm), 5 parts by weight of polyvinylidene difluoride (hereinafter PVdF) as a binder, and N-methyl-2-pyrrolidone (hereinafter NM) as a solvent.
P) was stirred at a ratio of 45 parts by weight to obtain a positive electrode coating material. This positive electrode coating material was formed into a film on an aluminum foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped positive electrode having a thickness of 100 μm.
【００９２】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００９３】（比較例３）比較例３のリチウムイオン二
次電池は、図２に示すような、正極板１、接着層６、正
極層２、電解質層３、負極層４及び負極板５がこの順で
配置されたリチウムイオン二次電池である。Comparative Example 3 The lithium-ion secondary battery of Comparative Example 3 has the positive electrode plate 1, the adhesive layer 6, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 as shown in FIG. The lithium-ion secondary batteries are arranged in this order.
【００９４】正極層２は以下のように作成した。The positive electrode layer 2 was prepared as follows.
【００９５】リチウム含有コバルト酸（一次粒子径：５
μｍ）を１００重量部、カーボンブラック（一次粒子
径：０．０５μｍ）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
μm), 100 parts by weight, carbon black (primary particle diameter: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【００９６】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１重量部の
比率で撹拌して接着層用塗料を作成した。その接着層用
塗料をアルミ箔上にドクターブレードにて成膜し、常温
に静置して自然乾燥にて厚さ２μｍのシート状接着層６
を作成した。次に前記正極塗料を接着層６上に塗布し、
１００μｍのシート状正極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 1 part by weight of the carbon nanotube were stirred to prepare a coating material for an adhesive layer. A sheet-shaped adhesive layer 6 having a thickness of 2 μm is formed by coating the adhesive layer coating material on an aluminum foil with a doctor blade and allowing it to stand at room temperature and air-drying.
It was created. Next, the positive electrode paint is applied onto the adhesive layer 6,
A 100 μm sheet-shaped positive electrode was prepared.
【００９７】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【００９８】（比較例４）比較例４のリチウムイオン二
次電池は、図２に示すような、正極板１、接着層６、正
極層２、電解質層３、負極層４及び負極板５がこの順で
配置されたリチウムイオン二次電池である。Comparative Example 4 The lithium ion secondary battery of Comparative Example 4 has the positive electrode plate 1, the adhesive layer 6, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 as shown in FIG. The lithium-ion secondary batteries are arranged in this order.
【００９９】正極層２は以下のように作成した。The positive electrode layer 2 was prepared as follows.
【０１００】リチウム含有コバルト酸（一次粒子径：５
μｍ）を１００重量部、カーボンブラック（一次粒子
径：０．０５μｍ）を１重量部、ＰＶｄＦを４重量部、
ＮＭＰを４５重量部の比率で撹拌して正極塗料を作成し
た。Lithium-containing cobalt acid (primary particle size: 5
μm), 100 parts by weight, carbon black (primary particle diameter: 0.05 μm) 1 part by weight, PVdF 4 parts by weight,
NMP was stirred at a ratio of 45 parts by weight to prepare a positive electrode coating material.
【０１０１】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１５０重量
部の比率で撹拌して接着層用塗料を作成した。その接着
層用塗料をアルミ箔上にドクターブレードにて成膜し、
常温に静置して自然乾燥にて厚さ２μｍのシート状接着
層６を作成した。次に前記正極塗料を接着層６上に塗布
し、１００μmのシート状正極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 150 parts by weight of the carbon nanotube were stirred to prepare a coating material for an adhesive layer. The adhesive layer paint is deposited on the aluminum foil with a doctor blade,
The sheet-like adhesive layer 6 having a thickness of 2 μm was prepared by allowing to stand at room temperature and natural drying. Next, the positive electrode coating material was applied onto the adhesive layer 6 to prepare a sheet-shaped positive electrode having a thickness of 100 μm.
【０１０２】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１０３】（比較例５）比較例５のリチウムイオン二
次電池は、図１に示すような、正極板１、正極層２、電
解質層３、負極層４及び負極板５がこの順で配置された
リチウムイオン二次電池である。Comparative Example 5 In the lithium ion secondary battery of Comparative Example 5, as shown in FIG. 1, the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 are arranged in this order. It is a rechargeable lithium-ion secondary battery.
【０１０４】負極層４は、以下のように作成した。The negative electrode layer 4 was prepared as follows.
【０１０５】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、導電材であるカー
ボンナノチューブを０．０５重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。この負極塗料を銅箔状にドク
ターブレードにて成膜し、常温に静置して自然乾燥にて
厚さ１５０μｍのシート状負極を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 0.05 part by weight of carbon nanotubes as a conductive material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent. Parts were mixed to obtain a negative electrode paint. This negative electrode coating material was formed into a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped negative electrode having a thickness of 150 μm.
【０１０６】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１０７】（比較例６）比較例６のリチウムイオン二
次電池は、図１に示すような、正極板１、正極層２、電
解質層３、負極層４及び負極板５がこの順で配置された
リチウムイオン二次電池である。Comparative Example 6 In the lithium ion secondary battery of Comparative Example 6, as shown in FIG. 1, the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4 and the negative electrode plate 5 are arranged in this order. It is a rechargeable lithium-ion secondary battery.
【０１０８】負極層４は、以下のように作成した。The negative electrode layer 4 was prepared as follows.
【０１０９】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、導電材であるカー
ボンナノチューブを５重量部、バインダーであるＰＶｄ
Ｆを１０重量部と溶剤であるＮＭＰを１００重量部混合
し負極塗料を得た。この負極塗料を銅箔状にドクターブ
レードにて成膜し、常温に静置して自然乾燥にて厚さ１
５０μｍのシート状負極を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) which is an active material, 5 parts by weight of carbon nanotube which is a conductive material, and PVd which is a binder.
10 parts by weight of F and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. A film of this negative electrode coating is formed on a copper foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 1
A 50 μm sheet-shaped negative electrode was prepared.
【０１１０】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１１１】（比較例７）実施例７のリチウムイオン二
次電池は、正極板１、正極層２、電解質層３、負極層
４、接着層６及び負極板５がこの順で配置されたリチウ
ムイオン二次電池である。(Comparative Example 7) The lithium ion secondary battery of Example 7 is a lithium in which the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4, the adhesive layer 6 and the negative electrode plate 5 are arranged in this order. It is an ion secondary battery.
【０１１２】負極塗料は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode coating material was prepared as follows (the following composition is a ratio based on 100 parts by weight of graphite carbon as an active material).
【０１１３】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。100 parts by weight of graphite carbon (primary particle size: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material.
【０１１４】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１重量部の
比率で撹拌して接着層用塗料を作成した。その接着層用
塗料を銅箔上にドクターブレードにて成膜し、常温に静
置して自然乾燥にて厚さ２μｍのシート状接着層６を作
成した。次に前記負極塗料を接着層６上に塗布し、１５
０μｍのシート状負極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 1 part by weight of the carbon nanotube were stirred to prepare a coating material for an adhesive layer. The adhesive layer coating material was formed into a film on a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped adhesive layer 6 having a thickness of 2 μm. Next, the negative electrode paint is applied onto the adhesive layer 6,
A 0 μm sheet-shaped negative electrode was prepared.
【０１１５】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１１６】（比較例８）実施例８のリチウムイオン二
次電池は、正極板１、正極層２、電解質層３、負極層
４、接着層６及び負極板５がこの順で配置されたリチウ
ムイオン二次電池である。Comparative Example 8 The lithium ion secondary battery of Example 8 is a lithium in which the positive electrode plate 1, the positive electrode layer 2, the electrolyte layer 3, the negative electrode layer 4, the adhesive layer 6 and the negative electrode plate 5 are arranged in this order. It is an ion secondary battery.
【０１１７】負極塗料は以下のように作成した（以下の
組成は活物質であるグラファイトカーボン１００重量部
に対する比率である。）。The negative electrode coating material was prepared as follows (the following composition is a ratio based on 100 parts by weight of graphite carbon as an active material).
【０１１８】活物質であるグラファイトカーボン（一次
粒子径：２０μｍ）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material.
【０１１９】接着層６は以下のように作成した。バイン
ダー１００重量部とカーボンナノチューブを１５０重量
部の比率で撹拌して接着層用塗料を作成した。その接着
層用塗料を銅箔上にドクターブレードにて成膜し、常温
に静置して自然乾燥にて厚さ２μｍのシート状接着層６
を作成した。次に前記負極塗料を接着層６上に塗布し、
１５０μｍのシート状負極を作成した。The adhesive layer 6 was prepared as follows. 100 parts by weight of the binder and 150 parts by weight of the carbon nanotube were stirred to prepare a coating material for an adhesive layer. A sheet of the adhesive layer 6 having a thickness of 2 μm is formed by coating the adhesive layer coating material on a copper foil with a doctor blade, allowing it to stand at room temperature, and naturally drying it.
It was created. Next, the negative electrode paint is applied onto the adhesive layer 6,
A 150 μm sheet-shaped negative electrode was prepared.
【０１２０】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１２１】（比較例９）正極層は、以下のように作成
した。（以下の組成は活物質であるリチウム含有コバル
ト酸１００重量部に対する比率である。）リチウム含有
コバルト酸１００重量部と導電材であるカーボンブラッ
ク（粒子径：０．０５μm）を３重量部、バインダーで
あるポリビニリデンジフロライド（以下ＰＶｄＦ）を４
重量部、溶剤であるＮ−メチル−２−ピロリドン（以下
ＮＭＰ）を４５重量部の比率で撹拌して正極塗料を得
た。この正極塗料をアルミ箔上にドクターブレードにて
成膜し、常温に静置して自然乾燥により厚さ１００μm
のシート状正極を作成した。(Comparative Example 9) The positive electrode layer was prepared as follows. (The following composition is a ratio with respect to 100 parts by weight of lithium-containing cobaltic acid which is an active material.) 3 parts by weight of 100 parts by weight of lithium-containing cobaltic acid and carbon black (particle diameter: 0.05 μm) which is a conductive material, a binder Polyvinylidene difluoride (hereinafter PVdF)
By weight, N-methyl-2-pyrrolidone (hereinafter NMP) as a solvent was stirred at a ratio of 45 parts by weight to obtain a positive electrode coating material. A film of this positive electrode coating is formed on an aluminum foil with a doctor blade, left to stand at room temperature, and naturally dried to a thickness of 100 μm.
A sheet-shaped positive electrode of was prepared.
【０１２２】負極層は以下のように作成した（以下の組
成は活物質であるグラファイトカーボン１００重量部に
対する比率である。）。The negative electrode layer was prepared as follows (the following composition is a ratio based on 100 parts by weight of graphite carbon as an active material).
【０１２３】活物質であるグラファイトカーボン（一次
粒子径：２０μm）を１００重量部、バインダーである
ＰＶｄＦを１０重量部と溶剤であるＮＭＰを１００重量
部混合し負極塗料を得た。この負極塗料を銅箔状にドク
ターブレードにて成膜し、常温に静置して自然乾燥にて
厚さ１５０μmのシート状負極を作成した。100 parts by weight of graphite carbon (primary particle diameter: 20 μm) as an active material, 10 parts by weight of PVdF as a binder and 100 parts by weight of NMP as a solvent were mixed to obtain a negative electrode coating material. This negative electrode coating material was formed into a copper foil with a doctor blade, allowed to stand at room temperature, and naturally dried to form a sheet-shaped negative electrode having a thickness of 150 μm.
【０１２４】それ以外は実施例１と同様にリチウムイオ
ン二次電池を作成した。A lithium ion secondary battery was prepared in the same manner as in Example 1 except for the above.
【０１２５】以上のように作成された電池において、
０．２Ｃ（１００ｍＡ）の定電流モードで充電した後、
４．２Ｖの定電圧モードで充電を行った。次に０．２Ｃ
（１００ｍＡ）１Ｃ（５００ｍＡ）、２Ｃ（１０００ｍ
Ａ）の電流密度でそれぞれについて放電を行い、放電電
圧３Ｖで容量確認を行った。また、１００サイクル後の
容量維持率も測定した。また、電池の電気抵抗も測定し
た。In the battery prepared as described above,
After charging in constant current mode of 0.2C (100mA),
Charging was performed in a constant voltage mode of 4.2V. Next 0.2C
(100mA) 1C (500mA), 2C (1000m
Discharge was performed for each of the current densities of A), and the capacity was confirmed at a discharge voltage of 3V. In addition, the capacity retention rate after 100 cycles was also measured. The electric resistance of the battery was also measured.
【０１２６】これらの結果を表１に示した。The results are shown in Table 1.
【０１２７】[0127]
【表１】 [Table 1]
【０１２８】表１に示すように正極層２、負極層４また
は接着層６内にカーボンナノチューブを含有すると極板
内の導電率が向上し、サイクル特性、レート特性が向上
することが分かる（実施例１〜１２）。特に従来用いら
れてきたカーボンブラックを添加したリチウムイオン二
次電池と比較しても向上する（比較例９）。As shown in Table 1, when carbon nanotubes are contained in the positive electrode layer 2, the negative electrode layer 4 or the adhesive layer 6, the conductivity in the electrode plate is improved and the cycle characteristics and rate characteristics are improved (implementation). Examples 1-12). In particular, it is improved even when compared with a lithium ion secondary battery containing carbon black which has been used conventionally (Comparative Example 9).
【０１２９】正極層２中のカーボンナノチューブが０．
１重量部より少ないと電池の電気抵抗が高くなりサイク
ル寿命が劣化する。（比較例１）また、正極層２中のカ
ーボンナノチューブの含有率が３重量部より多いと正極
層２中の活物質比率が低下し、容量が低くなることが分
かる（比較例２）。When the carbon nanotubes in the positive electrode layer 2 are 0.
If the amount is less than 1 part by weight, the electric resistance of the battery increases and the cycle life deteriorates. (Comparative Example 1) Further, it is understood that when the content of the carbon nanotubes in the positive electrode layer 2 is more than 3 parts by weight, the ratio of the active material in the positive electrode layer 2 is lowered and the capacity is lowered (Comparative Example 2).
【０１３０】接着層中６のカーボンナノチューブが５重
量部より少ないと電池の電気抵抗が高くなりサイクル寿
命が劣化する（比較例３，７）。また、接着層６中のカ
ーボンナノチューブの含有率が１００重量部より多いと
接着性が低下し、正極層２または負極層４が剥がれてサ
イクル寿命が悪化する（比較例４，８）。When the amount of carbon nanotubes 6 in the adhesive layer is less than 5 parts by weight, the electric resistance of the battery increases and the cycle life deteriorates (Comparative Examples 3 and 7). Further, if the content of carbon nanotubes in the adhesive layer 6 is more than 100 parts by weight, the adhesiveness is lowered, the positive electrode layer 2 or the negative electrode layer 4 is peeled off, and the cycle life is deteriorated (Comparative Examples 4 and 8).
【０１３１】負極層４中のカーボンナノチューブが０．
１重量部より少ないと電池の電気抵抗が高くなりサイク
ル寿命が劣化する（比較例１）。また、負極層４中のカ
ーボンナノチューブの含有率が３重量部より多いと＊負
極層４中の活物質比率が低下し、容量が低くなることが
分かる（比較例２）。When the carbon nanotubes in the negative electrode layer 4 are 0.
If the amount is less than 1 part by weight, the electric resistance of the battery increases and the cycle life deteriorates (Comparative Example 1). Further, it can be seen that when the content ratio of the carbon nanotubes in the negative electrode layer 4 is more than 3 parts by weight, the ratio of the active material in the negative electrode layer 4 decreases and the capacity decreases (Comparative Example 2).
【０１３２】[0132]
【発明の効果】以上述べたように本発明は、導電材にカ
ーボンナノチューブを用いることによって、サイクル寿
命、レート特性に優れたリチウムイオン二次電池を実現
するものである。As described above, the present invention realizes a lithium ion secondary battery excellent in cycle life and rate characteristics by using carbon nanotubes as a conductive material.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施の形態１のリチウムイオン二次電
池の構成図FIG. 1 is a configuration diagram of a lithium ion secondary battery according to a first embodiment of the present invention.
【図２】本発明の実施の形態２のリチウムイオン二次電
池の構成図FIG. 2 is a configuration diagram of a lithium ion secondary battery according to a second embodiment of the present invention.
１ 正極板 ２ 正極層 ３ 電解質層 ４ 負極層 ５ 負極板 ６ 接着層 1 Positive plate 2 Positive electrode layer 3 Electrolyte layer 4 Negative electrode layer 5 Negative electrode plate 6 Adhesive layer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H029 AJ02 AJ05 AK02 AK03 AK05 AL06 AM03 AM04 AM05 AM07 BJ12 CJ08 CJ22 DJ08 DJ16 EJ04 HJ01 5H050 AA07 AA08 BA15 CA05 CA07 CA08 CA09 CA11 CB07 DA02 DA03 DA10 EA08 FA02 FA17 GA10 GA22 HA01 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 5H029 AJ02 AJ05 AK02 AK03 AK05 AL06 AM03 AM04 AM05 AM07 BJ12 CJ08 CJ22 DJ08 DJ16 EJ04 HJ01 5H050 AA07 AA08 BA15 CA05 CA07 CA08 CA09 CA11 CB07 DA02 DA03 DA10 EA08 FA02 FA17 GA10 GA22 HA01
Claims (8)
層と、負極板とがこの順で配置されたリチウムイオン二
次電池において、前記正極層には正極活物質と導電材と
バインダーとが含まれており、前記導電材がカーボンナ
ノチューブであるリチウムイオン二次電池。1. A lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, wherein the positive electrode layer contains a positive electrode active material and a conductive material. A lithium ion secondary battery containing a binder and the conductive material being carbon nanotubes.
ブの含有量が、前記正極活物質１００重量部に対して、
０．１重量部以上、３重量部以下である請求項１に記載
のリチウムイオン二次電池。2. The content of the carbon nanotubes in the positive electrode layer is based on 100 parts by weight of the positive electrode active material.
The lithium ion secondary battery according to claim 1, which is 0.1 part by weight or more and 3 parts by weight or less.
層と、負極板とがこの順で配置されたリチウムイオン二
次電池において、前記正極板と前記正極層との間に配置
された接着層を備え、その接着層がカーボンナノチュー
ブとバインダーとを含有するリチウムイオン二次電池。3. A lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, and the lithium ion secondary battery is arranged between the positive electrode plate and the positive electrode layer. Lithium-ion secondary battery comprising the above-mentioned adhesive layer, the adhesive layer containing carbon nanotubes and a binder.
ブの含有量が、前記バインダー１００重量部に対して、
５重量部以上、１００重量部以下である請求項３に記載
のリチウムイオン二次電池。4. The content of the carbon nanotubes in the adhesive layer is based on 100 parts by weight of the binder.
The lithium ion secondary battery according to claim 3, wherein the amount is 5 parts by weight or more and 100 parts by weight or less.
層と、負極板とがこの順で配置されたリチウムイオン二
次電池において、前記負極層には負極活物質と導電材と
バインダーとが含まれており、前記導電材がカーボンナ
ノチューブであるリチウムイオン二次電池。5. A lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, wherein the negative electrode layer contains a negative electrode active material and a conductive material. A lithium ion secondary battery containing a binder and the conductive material being carbon nanotubes.
ブの含有量が、前記負極活物質１００重量部に対して、
０．１重量部以上、３重量部以下である請求項５に記載
のリチウムイオン二次電池。6. The content of the carbon nanotubes in the negative electrode layer is based on 100 parts by weight of the negative electrode active material.
The lithium ion secondary battery according to claim 5, which is 0.1 part by weight or more and 3 parts by weight or less.
層と、負極板とがこの順で配置されたリチウムイオン二
次電池において、前記負極板と前記負極層との間に配置
された接着層を備え、その接着層がカーボンナノチュー
ブとバインダーとを含有するリチウムイオン二次電池。7. A lithium ion secondary battery in which a positive electrode plate, a positive electrode layer, an electrolyte layer, a negative electrode layer, and a negative electrode plate are arranged in this order, and the lithium ion secondary battery is arranged between the negative electrode plate and the negative electrode layer. Lithium-ion secondary battery comprising the above-mentioned adhesive layer, the adhesive layer containing carbon nanotubes and a binder.
ブの含有量が、前記バインダー１００重量部に対して、
５重量部以上、１００重量部以下である請求項７に記載
のリチウムイオン二次電池。8. The content of the carbon nanotubes in the adhesive layer is based on 100 parts by weight of the binder.
The lithium ion secondary battery according to claim 7, which is 5 parts by weight or more and 100 parts by weight or less.
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|---|---|---|---|
| JP2001265288A JP2003077476A (en) | 2001-09-03 | 2001-09-03 | Lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001265288A JP2003077476A (en) | 2001-09-03 | 2001-09-03 | Lithium ion secondary battery |
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| Publication Number | Publication Date |
|---|---|
| JP2003077476A true JP2003077476A (en) | 2003-03-14 |
Family
ID=19091773
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001265288A Pending JP2003077476A (en) | 2001-09-03 | 2001-09-03 | Lithium ion secondary battery |
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| Country | Link |
|---|---|
| JP (1) | JP2003077476A (en) |
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