JPH1079262A - Non-aqueous electrolyte secondary battery - Google Patents
Non-aqueous electrolyte secondary batteryInfo
- Publication number
- JPH1079262A JPH1079262A JP8234023A JP23402396A JPH1079262A JP H1079262 A JPH1079262 A JP H1079262A JP 8234023 A JP8234023 A JP 8234023A JP 23402396 A JP23402396 A JP 23402396A JP H1079262 A JPH1079262 A JP H1079262A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- battery
- lithium
- secondary battery
- aqueous electrolyte
- 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
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- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非水電解液二次電
池において、ハイレート充放電を可能にする技術分野に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a non-aqueous electrolyte secondary battery capable of high-rate charging and discharging.
【０００２】[0002]
【従来の技術】近年、ＡＶ機器あるいはパソコン等の電
子機器のポータブル化，コードレス化が急速に進んでお
り、これらの駆動用電源として小型，軽量で高エネルギ
ー密度を有する二次電池への要求が高くなっている。こ
の中でリチウムを活物質とする負極を用いた非水電解液
二次電池は、とりわけ高電圧，高エネルギー密度を有す
る電池としての期待が大きくなっている。2. Description of the Related Art In recent years, portable and cordless electronic devices such as AV devices and personal computers have been rapidly advanced, and there is a demand for a small, lightweight, high energy density secondary battery as a power supply for driving these devices. Is getting higher. Among them, a non-aqueous electrolyte secondary battery using a negative electrode containing lithium as an active material has been particularly expected to be a battery having a high voltage and a high energy density.
【０００３】上記の電池では、正極活物質にＬｉＣｏＯ
2 ，ＬｉＮｉＯ2 ，ＬｉＭｎ2Ｏ4等のリチウムに対して
４Ｖ級の電圧を示すリチウム含有金属酸化物が用いら
れ、負極にはリチウムをインターカレート，デインター
カレートできる炭素材料等が用いられている。In the above battery, LiCoO is used as a positive electrode active material.
2 , LiNiO 2 , LiMn 2 O 4, etc., a lithium-containing metal oxide exhibiting a voltage of 4V class with respect to lithium is used, and a carbon material capable of intercalating and deintercalating lithium is used for a negative electrode. ing.
【０００４】これらの二次電池では、高電圧においても
電気分解されないようにするため、非水系の有機溶媒を
用いる必要がある。一般に、有機溶媒は水溶液に比べ比
誘電率が小さいが、比誘電率の大きさは、溶媒中でのイ
オン対の解離し易さに大きく関与しており、この値が大
きければ、多くのイオン対を溶解することができる。In these secondary batteries, it is necessary to use a non-aqueous organic solvent in order to prevent electrolysis even at a high voltage. In general, an organic solvent has a lower relative dielectric constant than an aqueous solution, but the relative dielectric constant has a large effect on the dissociation of ion pairs in the solvent. The pair can be dissolved.
【０００５】しかし、上記のように有機溶媒は比誘電率
が小さく、水溶液に比べるとわずかのイオン対しか溶解
できない。すなわち、非水系の有機電解液は電荷の担い
手であるイオンがわずかしか溶解できないため、電解液
としての電気伝導度は水溶液系に比べ小さくなる。However, as described above, the organic solvent has a small relative dielectric constant, and can dissolve only a few ion pairs as compared with an aqueous solution. That is, in the non-aqueous organic electrolytic solution, only a small amount of ions that carry electric charges can be dissolved, so that the electric conductivity as the electrolytic solution is smaller than that in the aqueous solution type.
【０００６】このため、水溶液系二次電池であるニッケ
ル−カドミウム電池や鉛蓄電池と比較して電解液による
内部抵抗が大きくなり、大電流で放電を行うと過電圧が
大きく容量が低下する原因となる。For this reason, the internal resistance due to the electrolytic solution becomes larger than that of a nickel-cadmium battery or a lead storage battery which is an aqueous secondary battery, and when a large current is discharged, an overvoltage is large and the capacity is reduced. .
【０００７】また、高い比誘電率を有する有機溶媒は一
般に粘度が高く、電解液の粘度は、イオンの移動抵抗に
直接関わるため、電解液の電気伝導度が溶液粘度によっ
てほぼ決定づけられることが多い。An organic solvent having a high relative dielectric constant generally has a high viscosity, and the viscosity of the electrolytic solution is directly related to the ion migration resistance. Therefore, the electric conductivity of the electrolytic solution is almost determined by the viscosity of the solution. .
【０００８】従って、従来の非水電解液二次電池にあっ
ては、低粘度の溶媒を混合して電解液の電気伝導度を最
適化し、大電流における放電特性を確保するようにして
いる。Therefore, in a conventional non-aqueous electrolyte secondary battery, a low-viscosity solvent is mixed to optimize the electric conductivity of the electrolyte and to secure discharge characteristics at a large current.
【０００９】[0009]
【発明が解決しようとする課題】従来の非水系の二次電
池では、上記で説明したように、より高い電気伝導度を
示す有機電解液が熱望されており、低粘度の有機溶媒を
組み合わせて電解液の粘度を下げ、より高い電気伝導度
を獲得してきたが、低粘度の有機溶媒は、比誘電率が低
いため、電解液自身の比誘電率も低下して溶質のイオン
解離が進まず、電解液の伝導度にほとんど関与すること
がなく、添加量に対して電気伝導性の増加が期待できな
いという問題点があった。As described above, in a conventional non-aqueous secondary battery, an organic electrolyte having a higher electric conductivity is desired, and a low-viscosity organic solvent is used in combination. Although the viscosity of the electrolyte has been lowered and higher electric conductivity has been obtained, the low-viscosity organic solvent has a low relative dielectric constant, so the relative dielectric constant of the electrolyte itself also decreases, and the ionic dissociation of the solute does not proceed. In addition, there is a problem that the conductivity is hardly involved in the conductivity of the electrolytic solution, and the increase in the electrical conductivity cannot be expected with respect to the added amount.
【００１０】[0010]
【課題を解決するための手段】上記の問題点を解決する
ために、本発明はリチウム含有酸化物を活物質とする正
極と、リチウムの吸蔵，放出が可能な炭素材料を用いた
負極と、非水電解液とを有する非水電解液二次電池にお
いて、電解液の添加剤として炭素以外の異種元素を含む
ことにより非共有電子対を一つ以上有する芳香族系化合
物、例えばピリジン，ピリミジン，フラン，チオフェン
等を０．１〜２０容量％の範囲において添加することと
している。そして、このような芳香族系化合物を添加す
ることにより、電解液の電気伝導度が向上し、電池の内
部抵抗が減少し、効率の良い充放電を行うことができ、
結果として合剤の利用率が改善され、急速充放電が可能
な高容量の非水電解液二次電池を得ることができる。In order to solve the above problems, the present invention provides a positive electrode using a lithium-containing oxide as an active material, a negative electrode using a carbon material capable of absorbing and releasing lithium, In a non-aqueous electrolyte secondary battery having a non-aqueous electrolyte, an aromatic compound having at least one lone pair of electrons by including a different element other than carbon as an additive of the electrolyte, for example, pyridine, pyrimidine, Furan, thiophene and the like are added in the range of 0.1 to 20% by volume. By adding such an aromatic compound, the electric conductivity of the electrolytic solution is improved, the internal resistance of the battery is reduced, and efficient charging and discharging can be performed.
As a result, the availability of the mixture is improved, and a high-capacity nonaqueous electrolyte secondary battery capable of rapid charging and discharging can be obtained.
【００１１】[0011]
【発明の実施の形態】本発明は、リチウム含有酸化物を
活物質とする正極と、リチウムを吸蔵，放出する炭素材
料を用いた負極と、非水電解液とを有する非水電解液二
次電池において、環内に炭素以外の異種元素を含んで形
成する非共有電子対を一つ以上有する芳香族系化合物を
１〜２０容量％非水電解液に添加したものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a non-aqueous electrolyte secondary battery having a positive electrode using a lithium-containing oxide as an active material, a negative electrode using a carbon material that absorbs and releases lithium, and a non-aqueous electrolyte. In a battery, an aromatic compound having at least one lone pair of electrons forming a heterogeneous element other than carbon in a ring is added to a 1 to 20% by volume nonaqueous electrolyte.
【００１２】さらに、非共有電子対を一つ以上有する芳
香族系化合物としては、ピリジン,ピリミジン, フラン,
チオフェンもしくはそれらの誘導体のいずれかが好ま
しい。Further, aromatic compounds having at least one lone pair include pyridine, pyrimidine, furan, and the like.
Thiophene or any of their derivatives is preferred.
【００１３】電解液の電気伝導性を確保するためには、
電解質を高濃度に溶解する必要があるが、電解液の粘度
を下げるためには、低粘度の溶媒を混入する必要があ
り、低粘度の溶媒は、誘電率が低いため電解液の誘電率
も低くなる。この場合、高濃度で電解質を溶解すると会
合度が高くなるので、濃度に対して電気伝導度の上昇が
期待できなくなる。In order to ensure the electrical conductivity of the electrolyte,
Although it is necessary to dissolve the electrolyte at a high concentration, it is necessary to mix a low-viscosity solvent in order to lower the viscosity of the electrolyte, and the low-viscosity solvent has a low dielectric constant, so the dielectric constant of the electrolyte is also low. Lower. In this case, when the electrolyte is dissolved at a high concentration, the degree of association increases, so that an increase in the electrical conductivity with respect to the concentration cannot be expected.
【００１４】また、リチウムイオンは、原子半径が小さ
いためにエチレンカーボネート等の高極性溶媒により溶
媒和されるので、イオン半径が増大し、イオンの移動度
が落ち、電解液の電気伝導度が低下している。Since lithium ions are solvated by a highly polar solvent such as ethylene carbonate because of their small atomic radius, the ionic radius increases, the mobility of ions decreases, and the electric conductivity of the electrolyte decreases. doing.
【００１５】そこで、炭素以外の異種元素を含むことに
より非共有電子対を一つ以上有する芳香族系化合物を
０．１〜２０容量％の範囲において電解液に添加するこ
とにより、以下に説明するように作用する。なお、ここ
では特にピリジンを例にとってその作用について説明す
る。Therefore, the following description is made by adding an aromatic compound having at least one lone pair of electrons by containing a heterogeneous element other than carbon to the electrolyte in the range of 0.1 to 20% by volume. Act like so. In addition, here, the action will be described by taking pyridine as an example.
【００１６】ピリジンは、ヒュッケルの法則による（４
ｎ＋２）個の共役π電子の他に２個の非共有電子対を有
し、この２個の非共有電子対がカチオンと結合し、全体
として正に帯電したピリジニュウムイオンを形成する。Pyridine is determined by Hückel's law (4
It has two lone pairs in addition to (n + 2) conjugated π electrons, and these two lone pairs are combined with cations to form a positively charged pyridinium ion as a whole.
【００１７】そのため、ピリジンを電解液に混入する
と、電解液中のカチオンと結合してピリジニュウムイオ
ンが形成され、このピリジニュウムイオンは、リチウム
イオンに比べるとイオン半径が大きくなり、共役電子の
存在のため正の電荷が分散し溶媒和され難くなる。リチ
ウムイオンが、通常２分子以上の溶媒に溶媒和されてい
ることを考えると、ピリジニュウムイオンとなること
で、溶媒和したリチウムイオンに比較して半径が小さく
なり、溶液中でのイオンの移動抵抗が減少する。Therefore, when pyridine is mixed into the electrolytic solution, it binds to cations in the electrolytic solution to form pyridinium ions, which have a larger ionic radius than lithium ions and have a conjugated electron. , Positive charges are dispersed and solvation becomes difficult. Considering that lithium ions are usually solvated in two or more molecules of a solvent, the pyridinium ion has a smaller radius than the solvated lithium ion, and the ion Movement resistance is reduced.
【００１８】また、ピリジンはカチオンと結合して正に
帯電するため、他の求核剤の攻撃を受け難く、非常に安
定であり、なおかつ正極において酸化もされ難くなり、
またリチウムイオンがピリジニュウムイオンとしてトラ
ップされるため、イオン対の解離も促進され、電解液の
電気伝導率も増加するようになる。Further, since pyridine is positively charged by binding to a cation, it is hardly attacked by other nucleophiles, very stable, and hardly oxidized at the positive electrode.
Further, since lithium ions are trapped as pyridinium ions, dissociation of ion pairs is promoted, and the electric conductivity of the electrolytic solution also increases.
【００１９】高い比誘電率を示す溶媒は様々に考え得る
が、本発明では、非共有電子対を持つ共役π電子系に注
目した点に特徴がある。Although various solvents having a high relative permittivity can be considered, the present invention is characterized by focusing on a conjugated π-electron system having an unshared electron pair.
【００２０】すなわち、このような化合物を用いること
により、イオンの移動抵抗を減少させると同時にイオン
対の解離も促進させ、電解液の電気伝導度を向上させる
ことができる。That is, by using such a compound, it is possible to reduce the ion migration resistance and at the same time promote the dissociation of ion pairs, thereby improving the electric conductivity of the electrolytic solution.
【００２１】上記のような作用により、高い電気伝導性
を示す電解液を得て、充放電特性に優れた電池を提供す
ることができる。By the above-described operation, an electrolyte having high electric conductivity can be obtained, and a battery having excellent charge / discharge characteristics can be provided.
【００２２】[0022]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００２３】（実施例１）図１に本実施例で用いた円筒
形渦巻非水電解液二次電池の縦断面図を示す。図におい
て、１は耐有機電解液性のステンレス鋼板を加工した電
池ケース、２は安全弁を設けた封口板、３は絶縁パッキ
ング、４は極板群で、正極板５および負極板６がセパレ
ータ７を介して複数回渦巻状に巻回して形成され、電池
ケース１内に収納されている。そして、上記正極板５か
らは正極リード８が引き出されて封口板２に接続され、
負極板６からは負極リード９が引き出されて電池ケース
１の底部に接続されている。１０は絶縁リングで、極板
群４の上下部にそれぞれ設けられている。以下、正極
板，負極板について詳しく説明する。Example 1 FIG. 1 is a longitudinal sectional view of a cylindrical spiral nonaqueous electrolyte secondary battery used in this example. In the figure, reference numeral 1 denotes a battery case made of a stainless steel sheet having resistance to organic electrolyte, 2 denotes a sealing plate provided with a safety valve, 3 denotes an insulating packing, 4 denotes an electrode plate group, and a positive electrode plate 5 and a negative electrode plate 6 are separators 7. And is formed into a spiral shape a plurality of times, and is housed in the battery case 1. Then, the positive electrode lead 8 is pulled out from the positive electrode plate 5 and connected to the sealing plate 2,
A negative electrode lead 9 is pulled out from the negative electrode plate 6 and connected to the bottom of the battery case 1. Reference numeral 10 denotes an insulating ring provided on the upper and lower portions of the electrode plate group 4, respectively. Hereinafter, the positive electrode plate and the negative electrode plate will be described in detail.
【００２４】正極は、Ｌｉ2ＣＯ3 とＣｏ3Ｏ4 とを混合
し、９００℃で１０時間焼成して合成したＬｉＣｏＯ2
粉末の重量に対して、アセチレンブラック３％，フッ素
樹脂系結着剤７％を混合し、カルボキシメチルセルロー
ス水溶液に懸濁させて正極合剤ペーストとした。この正
極合剤ペーストを、厚さ３０μｍのアルミ箔に塗工し乾
燥した後、圧延して、厚さ０．１８ｍｍ，幅３７ｍｍ，
長さ３９０ｍｍの正極板５とした。The positive electrode is LiCoO 2 synthesized by mixing Li 2 CO 3 and Co 3 O 4 and firing at 900 ° C. for 10 hours.
With respect to the weight of the powder, 3% of acetylene black and 7% of a fluororesin-based binder were mixed and suspended in an aqueous solution of carboxymethylcellulose to prepare a positive electrode mixture paste. This positive electrode mixture paste is applied to an aluminum foil having a thickness of 30 μm, dried, and then rolled to a thickness of 0.18 mm, a width of 37 mm,
The positive electrode plate 5 was 390 mm in length.
【００２５】負極は、メソフェーズ小球体を２８００℃
の高温で黒鉛化したもの（以下、メソフェーズ黒鉛と称
す）を用いた。このメソフェーズ黒鉛の重量に対して、
スチレン／ブタジエンゴム５％を混合した後、カルボキ
シメチルセルロース水溶液に懸濁させてペースト状にし
て負極合剤ペーストとした。そして、この負極合剤ペー
ストを厚さ０．０２ｍｍのＣｕ箔の両面に塗工し乾燥し
た後、圧延して、厚さ０．２０ｍｍ，幅３９ｍｍ，長さ
４２０ｍｍの負極板６とした。The negative electrode was prepared by heating mesophase spheres at 2800 ° C.
(Hereinafter, referred to as mesophase graphite) was used. For the weight of this mesophase graphite,
After mixing 5% of styrene / butadiene rubber, the mixture was suspended in an aqueous solution of carboxymethylcellulose to form a paste to obtain a negative electrode mixture paste. Then, this negative electrode mixture paste was applied to both sides of a Cu foil having a thickness of 0.02 mm, dried, and then rolled to obtain a negative electrode plate 6 having a thickness of 0.20 mm, a width of 39 mm, and a length of 420 mm.
【００２６】そして、正極板５にはアルミニウム製の正
極リード８、負極板６にはニッケル製の負極リード９を
それぞれ取り付け、厚さ０．０２５ｍｍ，幅４５ｍｍ，
長さ９５０ｍｍのポリプロピレン製セパレータ７を介し
て渦巻状に巻回して極板群４とし、直径１７．０ｍｍ，
高さ５０．０ｍｍの電池ケース１に納入した。電解液に
はエチレンカーボネート（ＥＣ）とジエチルカーボネー
ト（ＤＥＣ）とプロピオン酸メチル（ＭＰ）とを３０：
５０：２０の体積比で混合した溶媒に１モル／リットル
のＬｉＰＦ6 を溶解したものを用い、電解液の添加剤と
して、２容量％のピリジンを用い、これを注液した後、
封口し、実施例の電池Ａとした。A positive electrode lead 8 made of aluminum is mounted on the positive electrode plate 5, and a negative electrode lead 9 made of nickel is mounted on the negative electrode plate 6, each having a thickness of 0.025 mm, a width of 45 mm and a width of 45 mm.
It is spirally wound through a polypropylene separator 7 having a length of 950 mm to form an electrode group 4 having a diameter of 17.0 mm,
Delivered to a battery case 1 with a height of 50.0 mm. Ethylene carbonate (EC), diethyl carbonate (DEC) and methyl propionate (MP) were used as the electrolyte solution.
A solution obtained by dissolving 1 mol / L of LiPF 6 in a solvent mixed at a volume ratio of 50:20 was used, and 2% by volume of pyridine was used as an additive of an electrolytic solution.
The battery was sealed and the battery A of the example was obtained.
【００２７】（実施例２）電解液の添加剤として、２容
量％のフランを用いた以外は実施例１の場合と同様の円
筒形渦巻非水電解液二次電池を構成した。これを実施例
の電池Ｂとした。Example 2 A cylindrical spiral non-aqueous electrolyte secondary battery was constructed in the same manner as in Example 1 except that 2% by volume of furan was used as an electrolyte additive. This was designated as Battery B of the example.
【００２８】（実施例３）電解液の添加剤として、２容
量％のチオフェンを用いた以外は実施例１の場合と同様
の円筒形渦巻非水電解液二次電池を構成した。これを実
施例の電池Ｃとした。Example 3 A cylindrical spiral non-aqueous electrolyte secondary battery was constructed in the same manner as in Example 1 except that 2% by volume of thiophene was used as an electrolyte additive. This was designated as Battery C of Example.
【００２９】（比較例）添加剤を加えていない電解液を
用いた以外は、実施例１の場合と同様の円筒形渦巻非水
電解液二次電池を構成し、これを比較例の電池Ｄとし
た。Comparative Example A cylindrical spiral non-aqueous electrolyte secondary battery similar to that of Example 1 was used except that an electrolytic solution to which no additive was added was used. And
【００３０】次に、実施例の電池Ａ，Ｂ，Ｃと比較例の
電池Ｄとを各５セルずつ用意して、環境温度２０℃で、
充電電圧４．１Ｖ，充電時間２時間，制限電流５００ｍ
Ａの定電圧充電を行った充電状態の電池について放電特
性を調べた。Next, the batteries A, B, and C of the example and the battery D of the comparative example were prepared by 5 cells each,
4.1V charging voltage, 2 hours charging time, 500m limited current
The discharge characteristics of the battery in the charged state where the constant voltage charging of A was performed were examined.
【００３１】この充電状態の電池を０．２Ａ，１Ａ，２
Ａで放電して容量を測定し、０．２Ａでの放電容量を１
００％とした場合、１Ａ，２Ａでの放電容量の維持率は
表１に示す通りである。The batteries in this charged state were charged at 0.2 A, 1 A, 2
A and discharge capacity at 0.2 A, and discharge capacity at 0.2 A is 1
Table 1 shows the maintenance ratio of the discharge capacity at 1A and 2A when the ratio is set to 00%.
【００３２】[0032]
【表１】 [Table 1]
【００３３】表１から、１Ａ／０．２Ａ，２Ａ／０．２
Ａの放電容量の維持率が、それぞれ電池Ａは９７％，９
５％、電池Ｂは９６％，９４％、電池Ｃは９６％，９３
％、電池Ｄは９０％，８３％であり、明らかに添加剤の
効果があることがわかる。From Table 1, 1A / 0.2A, 2A / 0.2
The retention rate of the discharge capacity of battery A was 97% and that of battery A was 9%.
5%, battery B 96%, 94%, battery C 96%, 93
% And Battery D are 90% and 83%, which clearly show the effect of the additive.
【００３４】また、添加剤の濃度に対する検討を行った
結果、１容量％以上で電池の放電特性の向上に効果が現
れ、１５容量％以上では添加剤の効果が現れ難くなり、
２０容量％以上では電解液自身の電気伝導率が減少して
逆に放電特性が悪くなり始めるので、０．１〜２０容量
％が好ましい。Further, as a result of studying the concentration of the additive, the effect of improving the discharge characteristics of the battery appears at 1% by volume or more, and the effect of the additive hardly appears at 15% by volume or more.
If the content is 20% by volume or more, the electric conductivity of the electrolytic solution itself decreases, and conversely, the discharge characteristics start to deteriorate. Therefore, 0.1 to 20% by volume is preferable.
【００３５】以上のような効果は、ピリジン，フラン，
チオフェンとそれぞれの誘導体、または芳香族系化合物
の中でも環内に炭素以外の異種元素を含むことにより、
非共有電子対を一つ以上有する化合物を電解液に添加す
ることにより期待できる。なお、非共有電子対を一つ以
上有する芳香族系化合物としては、多環性の芳香族系化
合物でも良く、ヒュッケルの法則に従う（４ｎ＋２）個
の共役π電子の他に２個の非共有電子対を持つ有機化学
物質が好ましい。The above effects are obtained by using pyridine, furan,
By including different elements other than carbon in the ring among thiophene and respective derivatives, or aromatic compounds,
This can be expected by adding a compound having one or more lone pairs to the electrolytic solution. The aromatic compound having at least one lone electron pair may be a polycyclic aromatic compound, and in addition to (4n + 2) conjugated π electrons and two lone electrons in accordance with Hückel's law. Paired organic chemicals are preferred.
【００３６】[0036]
【発明の効果】本発明は、以上説明したような形態で実
施され、電解液添加剤として炭素以外の異種元素を含む
ことにより非共有電子対を一つ以上有する芳香族系化合
物を０．１〜２０容量％の範囲において添加することに
より、電解液の電気伝導率を上げ放電特性の良い電池を
提供できる効果を奏する。The present invention is embodied in the form as described above, and contains a heterogeneous element other than carbon as an additive for an electrolyte so that an aromatic compound having at least one lone pair of electrons can be obtained. By adding in the range of 20 to 20% by volume, there is an effect that the electric conductivity of the electrolytic solution can be increased and a battery having good discharge characteristics can be provided.
【図１】本発明の実施例における円筒形渦巻非水電解液
二次電池の縦断面図FIG. 1 is a longitudinal sectional view of a cylindrical spiral nonaqueous electrolyte secondary battery according to an embodiment of the present invention.
５ 正極板 ６ 負極板 5 Positive electrode plate 6 Negative electrode plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹内 崇 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 越名 秀 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Takashi Takeuchi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (2)
と、リチウムの吸蔵，放出が可能な炭素材料を用いた負
極と、非水電解液とを有し、非水電解液には、環内に炭
素以外の異種元素を含んで形成する非共有電子対を一つ
以上有する芳香族系化合物を０．１〜２０容量％添加し
た非水電解液二次電池。1. A positive electrode using a lithium-containing oxide as an active material, a negative electrode using a carbon material capable of inserting and extracting lithium, and a non-aqueous electrolyte. A nonaqueous electrolyte secondary battery in which 0.1 to 20% by volume of an aromatic compound having at least one lone pair of electrons formed by including a heterogeneous element other than carbon therein is added.
化合物が、ピリジン，ピリミジン，フラン，チオフェン
もしくはそれらの誘導体の群から選ばれた少なくとも一
つである請求項１記載の非水電解液二次電池。2. The non-aqueous electrolyte according to claim 1, wherein the aromatic compound having one or more lone pairs is at least one selected from the group consisting of pyridine, pyrimidine, furan, thiophene, and derivatives thereof. Liquid secondary battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8234023A JPH1079262A (en) | 1996-09-04 | 1996-09-04 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8234023A JPH1079262A (en) | 1996-09-04 | 1996-09-04 | Non-aqueous electrolyte secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1079262A true JPH1079262A (en) | 1998-03-24 |
Family
ID=16964355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8234023A Pending JPH1079262A (en) | 1996-09-04 | 1996-09-04 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1079262A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6828175B2 (en) | 2002-08-29 | 2004-12-07 | Micron Technology, Inc. | Semiconductor component with backside contacts and method of fabrication |
| JP2006294374A (en) * | 2005-04-08 | 2006-10-26 | Sony Corp | Electrolyte solution and battery |
| WO2013094445A1 (en) * | 2011-12-22 | 2013-06-27 | シャープ株式会社 | Photoelectric conversion element |
| JP2014523101A (en) * | 2011-07-18 | 2014-09-08 | エルジー・ケム・リミテッド | Non-aqueous electrolyte and lithium secondary battery using the same |
| US11316196B2 (en) | 2018-12-21 | 2022-04-26 | Toyota Jidosha Kabushiki Kaisha | Lithium-ion battery containing electrolyte including capacity restoration additives and method for restoring capacity of lithium-ion battery |
| US12051778B2 (en) | 2018-12-21 | 2024-07-30 | Toyota Jidosha Kabushiki Kaisha | Lithium-ion battery containing electrolyte including capacity restoration additives and method for restoring capacity of lithium-ion battery |
-
1996
- 1996-09-04 JP JP8234023A patent/JPH1079262A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6828175B2 (en) | 2002-08-29 | 2004-12-07 | Micron Technology, Inc. | Semiconductor component with backside contacts and method of fabrication |
| US6903442B2 (en) | 2002-08-29 | 2005-06-07 | Micron Technology, Inc. | Semiconductor component having backside pin contacts |
| US7078266B2 (en) | 2002-08-29 | 2006-07-18 | Micron Technology, Inc. | Method for fabricating semiconductor components with thinned substrate, back side contacts and circuit side contacts |
| US7081665B2 (en) | 2002-08-29 | 2006-07-25 | Micron Technology, Inc. | Semiconductor component having thinned substrate, backside pin contacts and circuit side contacts |
| JP2006294374A (en) * | 2005-04-08 | 2006-10-26 | Sony Corp | Electrolyte solution and battery |
| JP2014523101A (en) * | 2011-07-18 | 2014-09-08 | エルジー・ケム・リミテッド | Non-aqueous electrolyte and lithium secondary battery using the same |
| US9871271B2 (en) | 2011-07-18 | 2018-01-16 | Lg Chem, Ltd. | Non-aqueous electrolyte and lithium secondary battery using the same |
| WO2013094445A1 (en) * | 2011-12-22 | 2013-06-27 | シャープ株式会社 | Photoelectric conversion element |
| US11316196B2 (en) | 2018-12-21 | 2022-04-26 | Toyota Jidosha Kabushiki Kaisha | Lithium-ion battery containing electrolyte including capacity restoration additives and method for restoring capacity of lithium-ion battery |
| US12051778B2 (en) | 2018-12-21 | 2024-07-30 | Toyota Jidosha Kabushiki Kaisha | Lithium-ion battery containing electrolyte including capacity restoration additives and method for restoring capacity of lithium-ion battery |
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