JPH08180875A - Lithium secondary battery - Google Patents
Lithium secondary batteryInfo
- Publication number
- JPH08180875A JPH08180875A JP6335905A JP33590594A JPH08180875A JP H08180875 A JPH08180875 A JP H08180875A JP 6335905 A JP6335905 A JP 6335905A JP 33590594 A JP33590594 A JP 33590594A JP H08180875 A JPH08180875 A JP H08180875A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- lithium secondary
- positive electrode
- lithium
- negative electrode
- 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.)
- Pending
Links
Classifications
-
- 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]
【産業上の利用分野】本発明は，リチウムを吸蔵・放出
できる正極及び負極を用いたリチウム二次電池に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium secondary battery using a positive electrode and a negative electrode capable of inserting and extracting lithium.
【０００２】[0002]
【従来技術】種々の二次電池のうち，特にリチウム二次
電池は，電圧が高いうえ，高いエネルギー密度を有して
いる。そのため，多くの分野において有望な二次電池と
して期待されている。従来のリチウム二次電池として
は，正極活物質にＬｉＣｏＯ2 ，ＬｉＮｉＯ2，ＬｉＭ
ｎ2 Ｏ4 等の金属酸化物を，負極活物質にリチウム金
属，リチウム合金，もしくはリチウムイオンを吸蔵・放
出可能な炭素体を用いたものがある（例えば特開昭６３
−１１４０６５号）。2. Description of the Related Art Among various secondary batteries, particularly lithium secondary batteries have high voltage and high energy density. Therefore, it is expected as a promising secondary battery in many fields. The conventional lithium secondary battery has a positive electrode active material such as LiCoO 2 , LiNiO 2 , and LiM.
There are some which use a metal oxide such as n 2 O 4 and a negative electrode active material which is a lithium metal, a lithium alloy, or a carbon body capable of absorbing and desorbing lithium ions (for example, JP-A-63-63).
-114065).
【０００３】[0003]
【解決しようとする課題】しかしながら，上記従来のリ
チウム二次電池においては，次の問題がある。即ち，従
来の正極活物質を用いたリチウム二次電池は，ニッケル
・カドミウム電池と比較して，出力密度が低い。そのた
め，例えば，電気自動車等のように高い出力密度を必要
とする製品への適用が難しい。なお，出力密度とは，単
位重量当たりの電力量をいい，放電平均電位を高くする
ことによりこれを高くすることができる。本発明は，か
かる従来の問題点に鑑みてなれたもので，放電平均電位
が高い，高出力密度のリチウム二次電池を提供しようと
するものである。However, the above-mentioned conventional lithium secondary battery has the following problems. That is, the lithium secondary battery using the conventional positive electrode active material has a lower output density than the nickel-cadmium battery. Therefore, it is difficult to apply to products that require high power density, such as electric vehicles. The power density means the amount of electric power per unit weight, which can be increased by increasing the discharge average potential. The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a lithium secondary battery having a high discharge average potential and a high output density.
【０００４】[0004]
【課題の解決手段】本発明は，リチウム，リチウム合
金，もしくはリチウムイオンを吸蔵・放出できる炭素体
からなる負極と，正極と，両者間に介設されるセパレー
タと，非水電解液とを有するリチウム二次電池におい
て，正極活物質は，Ｌｉx Ｔｉy Ｏ4 （ここに，０＜ｘ
≦２，１＜ｙ≦３），もしくはＬｉa Ｔｉb Ｍc Ｏ
4 （ここに，０＜ａ≦２，０＜ｂ≦３，０＜ｃ≦３）で
表され，上記Ｍは，Ｍｎ，Ｆｅ，Ｃｒ，Ｎｉ，Ｃｏ，Ｍ
ｇ，Ｂのうちから選択される少なくとも一種の元素であ
ることを特徴とするリチウム二次電池にある。The present invention has a negative electrode made of lithium, a lithium alloy, or a carbon body capable of inserting and extracting lithium ions, a positive electrode, a separator interposed therebetween, and a non-aqueous electrolyte. In the lithium secondary battery, the positive electrode active material is Li x Ti y O 4 (where 0 <x
≦ 2,1 <y ≦ 3), or Li a Ti b M c O
4 (where 0 <a ≦ 2, 0 <b ≦ 3, 0 <c ≦ 3), where M is Mn, Fe, Cr, Ni, Co, M
A lithium secondary battery is characterized in that it is at least one element selected from g and B.
【０００５】本発明において最も注目すべきことは，正
極活物質は，上記Ｌｉx Ｔｉy Ｏ4，もしくは上記Ｌｉ
a Ｔｉb Ｍc Ｏ4 で表され，上記Ｍは，Ｍｎ，Ｆｅ，Ｃ
ｒ，Ｎｉ，Ｃｏ，Ｍｇ，Ｂのうちから選択される少なく
とも一種の元素であることにある。What is most noticeable in the present invention is that the positive electrode active material is Li x Ti y O 4 or Li
a Ti b M c O 4, where M is Mn, Fe, C
It is at least one element selected from r, Ni, Co, Mg, and B.
【０００６】また，上記Ｌｉa Ｔｉb Ｍc Ｏ4 における
Ｍに用いる元素は，１種類である場合に限らず，２種以
上にすることもできる。この場合，Ｍを構成する元素の
総和量の割合が上記組成式Ｌｉa Ｔｉb Ｍc Ｏ4 におけ
るｃとなる。即ち，例えばＭが２種類（Ｍ１，Ｍ２とす
る）の元素よりなる場合においては，上記組成式Ｌｉa
Ｔｉb Ｍc Ｏ4 は，Ｌｉa Ｔｉb （Ｍ１d Ｍ２e ）c Ｏ
4 （ここに，ｄ＋ｅ＝１）により表される。その他，Ｍ
が３種以上の元素よりなる場合においても，同様であ
る。Further, the element used for M in the above Li a Ti b M c O 4 is not limited to one kind, but may be two or more kinds. In this case, the ratio of the total amount of the elements constituting M becomes c in the above composition formula Li a Ti b M c O 4 . That is, for example, when M is composed of two kinds of elements (M1 and M2), the above composition formula Li a
Ti b M c O 4 is Li a Ti b (M1 d M2 e ) c O
4 (where d + e = 1). Other, M
The same applies when is composed of three or more elements.
【０００７】また，上記組成式Ｌｉx Ｔｉy Ｏ4 におい
て，ｘが２を越える場合においては，複合酸化物が安定
的に得られなくなり，サイクル特性が悪くなるという問
題がある。また，ｙが１未満の場合には，安定したスピ
ネル構造が得られなくなり，電池容量が低下するという
問題があり，１．５以上が好ましい。また，ｙが３を越
える場合には，安定したスピネル構造が得られなくな
り，電池容量が低下するという問題があり，２．５以下
が好ましい。Further, in the above composition formula Li x Ti y O 4 , when x exceeds 2, there is a problem that the composite oxide cannot be stably obtained and the cycle characteristics deteriorate. Further, when y is less than 1, a stable spinel structure cannot be obtained and the battery capacity is lowered, so that it is preferably 1.5 or more. On the other hand, when y exceeds 3, there is a problem that a stable spinel structure cannot be obtained and the battery capacity decreases, so 2.5 or less is preferable.
【０００８】また，上記組成式Ｌｉa Ｔｉb Ｍc Ｏ4 に
おいて，ａが２を越える場合においては，上記ｘが２を
越える場合と同様に，複合酸化物が安定的に得られなく
なり，サイクル特性が悪くなるという問題がある。ま
た，ｂが３を越える場合には，上記ｙが３を越える場合
と同様に，安定したスピネル構造が得られなくなり，電
池容量が低下するという問題があり，２．５以下が好ま
しい。また，ｃが３を越える場合には，上記ｂが３を越
える場合と同様に，安定したスピネル構造が得られなく
なり，電池容量が低下するという問題があり，２．５以
下が好ましい。Further, in the above composition formula Li a Ti b M c O 4 , when a exceeds 2, as in the case where x exceeds 2, the complex oxide cannot be stably obtained and the cycle There is a problem that the characteristics deteriorate. When b exceeds 3, as in the case where y exceeds 3, there is a problem that a stable spinel structure cannot be obtained and the battery capacity decreases, so 2.5 or less is preferable. When c exceeds 3, there is a problem that a stable spinel structure cannot be obtained and the battery capacity decreases, as in the case where b exceeds 3, and 2.5 or less is preferable.
【０００９】また，上記セパレータとしては，ポリプロ
ピレンの多孔質フィルム等がある。そして，上記セパレ
ータに含浸させる非水電解液としては，非水溶媒に適量
の電解質を溶解したものがある。上記非水溶媒として
は，エチレンカーボネート，ジエチルカーボネート，プ
ロピレンカーボネート，ブチレンカーボネート，テトラ
ヒドロフラン，２−メチルテトラヒドロフラン，ジメト
キシエタン，ジオキソラン及びγ−ブチロラクトンから
選ばれた１種又は２種以上の溶媒が好適である。また，
上記電解質としては，ＬｉＰＦ6 ，ＬｉＣｌＯ4 ，Ｌｉ
ＢＦ4 ，ＬｉＡSＦ6 等がある。As the separator, there is a polypropylene porous film or the like. As the non-aqueous electrolytic solution with which the separator is impregnated, there is a non-aqueous solvent in which an appropriate amount of electrolyte is dissolved. As the non-aqueous solvent, one or more solvents selected from ethylene carbonate, diethyl carbonate, propylene carbonate, butylene carbonate, tetrahydrofuran, 2-methyltetrahydrofuran, dimethoxyethane, dioxolane and γ-butyrolactone are suitable. . Also,
As the electrolyte, LiPF 6 , LiClO 4 , Li
Examples include BF 4 and LiA S F 6 .
【００１０】[0010]
【作用および効果】本発明のリチウム二次電池において
は，上記正極活物質は，上記特定の組成により表される
物質を用いている。そのため，本発明のリチウム二次電
池は，従来よりも高い出力密度，即ち，ニッケル・カド
ミウム電池と同程度の高い出力密度を発揮することがで
きる。従って，本発明によれば，放電平均電位が高い，
高出力密度のリチウム二次電池を提供することができ
る。FUNCTION AND EFFECT In the lithium secondary battery of the present invention, the positive electrode active material is a material represented by the above specific composition. Therefore, the lithium secondary battery of the present invention can exhibit a higher output density than the conventional one, that is, a high output density comparable to that of the nickel-cadmium battery. Therefore, according to the present invention, the discharge average potential is high,
A lithium secondary battery with high output density can be provided.
【００１１】[0011]
実施例１ 本発明の実施例にかかるリチウム二次電池につき，図
１，図２を用いて説明する。本例のリチウム二次電池１
０は，図１に示すごとく，リチウムからなる負極３と，
正極２と，両者間に介設されるセパレータ４と，非水電
解液５とを有する。また，正極活物質は，Ｌｉ1 Ｔｉ2
Ｏ4 で表される物質を用いた。Example 1 A lithium secondary battery according to an example of the present invention will be described with reference to FIGS. 1 and 2. Lithium secondary battery 1 of this example
0 is a negative electrode 3 made of lithium, as shown in FIG.
It has a positive electrode 2, a separator 4 interposed therebetween, and a non-aqueous electrolyte solution 5. In addition, the positive electrode active material is Li 1 Ti 2
A substance represented by O 4 was used.
【００１２】また，上記リチウム二次電池１０は，以下
の手順により作製した。まず，ステンレス鋼製のネット
からなる正極集電体２２をスポット溶接した正極ケース
２５と，同じくステンレス鋼製のネットからなる負極集
電体３２をスポット溶接した負極ケース３５を準備す
る。上記正極ケース２５及び負極ケース３５は，共にス
テンレス鋼製の板を絞り加工したものであり，それぞれ
正極端子及び負極端子を兼ねるものである。The lithium secondary battery 10 is manufactured by the following procedure. First, a positive electrode case 25 in which a positive electrode current collector 22 made of a stainless steel net is spot-welded and a negative electrode case 35 in which a negative electrode current collector 32 also made of a stainless steel net is spot-welded are prepared. Each of the positive electrode case 25 and the negative electrode case 35 is formed by drawing a stainless steel plate, and also serves as a positive electrode terminal and a negative electrode terminal, respectively.
【００１３】次いで，負極３は，厚み０．５ｍｍ，直径
１５ｍｍのリチウムを上記負極集電体３２に圧着したも
のを用いる。また，上記正極集電体２２に圧着成形させ
る正極２は以下の手順により作製する。Next, as the negative electrode 3, one having a thickness of 0.5 mm and a diameter of 15 mm, which is pressed onto the negative electrode current collector 32, is used. Further, the positive electrode 2 to be pressure-molded on the positive electrode current collector 22 is manufactured by the following procedure.
【００１４】まず，二酸化チタンと炭酸リチウムとから
なる出発原料を，生成物のＬｉx Ｔｉ2 Ｏ4 におけるｘ
が１となるような組成に調合し，十分に粉砕混合する。
次いで，上記Ｌｉ1 Ｔｉ2 Ｏ4 よりなる混合物と，導電
剤としての黒鉛粉末と，結着剤としてのポリテトラフル
オロエチレン粉末とを，重量比６５：３０：５の割合で
混合して正極合剤とする。次いで，この正極合剤を，上
記正極集電体２２に圧着成形することによって，正極２
を得る。First, a starting material composed of titanium dioxide and lithium carbonate is used as x in the product Li x Ti 2 O 4 .
The composition is adjusted so that 1 becomes 1, and the mixture is sufficiently pulverized and mixed.
Next, the mixture of Li 1 Ti 2 O 4 described above, graphite powder as a conductive agent, and polytetrafluoroethylene powder as a binder were mixed in a weight ratio of 65: 30: 5 to mix the positive electrode. Use as an agent. Then, this positive electrode mixture is pressure-bonded to the positive electrode current collector 22 to form a positive electrode 2
Get.
【００１５】次いで，正極２と負極３との間に後述する
非水電解液５を含浸させたセパレータ４を介設すると共
に，ポリプロピレンを主体とするガスケット６を介して
上記正極ケース２５と負極ケース３５とを組み合わせ
る。そして，正極ケース２５の開口縁部を内側に折り曲
げてかしめることにより，内容物を密封，閉止する。こ
れにより，外径２０ｍｍ，厚さ２．５ｍｍのコイン型の
リチウム二次電池１０を得る。Next, a separator 4 impregnated with a non-aqueous electrolyte 5 described later is interposed between the positive electrode 2 and the negative electrode 3, and the positive electrode case 25 and the negative electrode case are interposed via a gasket 6 mainly made of polypropylene. Combine with 35. Then, the opening edge of the positive electrode case 25 is bent inward and caulked to seal and close the contents. As a result, a coin-type lithium secondary battery 10 having an outer diameter of 20 mm and a thickness of 2.5 mm is obtained.
【００１６】なお，上記非水電解液５としては，エチレ
ンカーボネートとジエチルカーボネートとを体積比１：
１の割合で混合した非水溶媒に，ＬｉＰＦ6 を１モル／
リットル溶解させたものを用いた。また，上記セパレー
タ４としては，ポリプロピレンの多孔質フィルムを用い
た。As the non-aqueous electrolyte solution 5, ethylene carbonate and diethyl carbonate are used in a volume ratio of 1:
1 mol of LiPF 6 in a non-aqueous solvent mixed at a ratio of 1
What was melt | dissolved in 1 liter was used. A porous polypropylene film was used as the separator 4.
【００１７】次に，本例のリチウム二次電池１０の充放
電試験結果について，図２を用いて説明する。充放電試
験の条件としては，室温において，１ｍＡの定電流によ
る充電と，１ｍＡの定電流による放電を繰り返した。ま
た充電上限電圧は５．２Ｖ（図２，Ａ），放電下限電圧
は３．５Ｖ（図２，Ｃ）とした。Next, the charge / discharge test results of the lithium secondary battery 10 of this example will be described with reference to FIG. As conditions for the charge / discharge test, charging at a constant current of 1 mA and discharging at a constant current of 1 mA were repeated at room temperature. The upper limit voltage of charging was 5.2 V (Fig. 2, A) and the lower limit voltage of discharging was 3.5 V (Fig. 2, C).
【００１８】試験の結果得られた充放電特性を図２に示
す。図２より知られるごとく，本例のリチウム二次電池
１０は，放電平均電位が４．５Ｖという高電位の放電特
性を有することが判る。即ち，図２に示すごとく，放電
開始時の電位５Ｖ（図２，Ｂ）と，放電終了時の電位
３．５Ｖ（図２，Ｃ）の平均が４．５Ｖという高電位と
なった。また，図２に示すごとく，優れた再現性が得ら
れた。The charge / discharge characteristics obtained as a result of the test are shown in FIG. As is known from FIG. 2, it is understood that the lithium secondary battery 10 of this example has a high-potential discharge characteristic with an average discharge potential of 4.5V. That is, as shown in FIG. 2, the average of the potential of 5 V at the start of discharge (FIG. 2, B) and the potential of 3.5 V at the end of discharge (FIG. 2, C) was as high as 4.5 V. Moreover, as shown in FIG. 2, excellent reproducibility was obtained.
【００１９】次に本例の作用効果につき説明する。本例
のリチウム二次電池１０においては，上記正極活物質
は，上記特定の組成により表される物質を用いている。
そのため，本例のリチウム二次電池１０は，従来よりも
高い出力密度，即ち，ニッケル・カドミウム電池と同程
度の高い出力密度を発揮することができる。Next, the function and effect of this example will be described. In the lithium secondary battery 10 of this example, the positive electrode active material is a material represented by the above specific composition.
Therefore, the lithium secondary battery 10 of this example can exhibit a higher output density than the conventional one, that is, a high output density comparable to that of the nickel-cadmium battery.
【００２０】実施例２ 本例のリチウム二次電池においては，実施例１の正極活
物質としてのＬｉ1 Ｔｉ2 Ｏ4 に代えて，Ｌｉ1.7 Ｔｉ
2 Ｏ4 を用いた。このＬｉ1.7 Ｔｉ2 Ｏ4 は，二酸化チ
タンと炭酸リチウムを出発物質として用いて，上記組成
になるように，実施例１と同様の手法により作製した。
その他は，実施例１と同様である。Example 2 In the lithium secondary battery of this example, Li 1.7 Ti was used instead of Li 1 Ti 2 O 4 as the positive electrode active material of Example 1.
2 O 4 was used. This Li 1.7 Ti 2 O 4 was prepared by the same method as in Example 1 using titanium dioxide and lithium carbonate as starting materials so as to have the above composition.
Others are the same as in the first embodiment.
【００２１】本例のリチウム二次電池について，実施例
１と同様の条件により充放電試験を行った。その結果，
図３より知られるごとく，放電平均電位が４．５Ｖを示
す高い放電特性を有することが判った。その他，実施例
１と同様の効果が得られる。The lithium secondary battery of this example was subjected to a charge / discharge test under the same conditions as in Example 1. as a result,
As is known from FIG. 3, it has been found that the battery has high discharge characteristics with an average discharge potential of 4.5V. In addition, the same effect as that of the first embodiment can be obtained.
【００２２】実施例３ 本例のリチウム二次電池においては，実施例１の正極活
物質としてのＬｉ1 Ｔｉ2 Ｏ4 に代えて，Ｌｉ2 Ｔｉ2
Ｏ4 を用いた。このＬｉ2 Ｔｉ2 Ｏ4 は，二酸化チタン
と炭酸リチウムを出発物質として用いて，上記組成にな
るように，実施例１と同様の手法により作製した。その
他は，実施例１と同様である。[0022] In the lithium secondary battery of Example 3 This example, in place of the Li 1 Ti 2 O 4 as a positive electrode active material of Example 1, Li 2 Ti 2
O 4 was used. This Li 2 Ti 2 O 4 was prepared by the same method as in Example 1 using titanium dioxide and lithium carbonate as starting materials so as to have the above composition. Others are the same as in the first embodiment.
【００２３】本例のリチウム二次電池について，実施例
１と同様の条件により充放電試験を行った。その結果，
図４より知られるごとく，放電平均電位が４．５Ｖを示
す高い放電特性を有することが判った。その他，実施例
１と同様の効果が得られる。The lithium secondary battery of this example was subjected to a charge / discharge test under the same conditions as in Example 1. as a result,
As is known from FIG. 4, it has been found that the battery has high discharge characteristics with an average discharge potential of 4.5V. In addition, the same effect as that of the first embodiment can be obtained.
【００２４】実施例４ 本例のリチウム二次電池においては，実施例１の正極活
物質としてのＬｉ1 Ｔｉ2 Ｏ4 に代えて，Ｌｉ1 Ｔｉ
0.9 Ｍｎ1.1 Ｏ4 を用いた。このＬｉ1 Ｔｉ0.9Ｍｎ
1.1 Ｏ4 は，二酸化チタン，二酸化マンガン，及び炭酸
リチウムを出発物質として用いて，上記組成になるよう
に，実施例１と同様の手法により作製した。その他は，
実施例１と同様である。Example 4 In the lithium secondary battery of this example, Li 1 Ti 2 O 4 as the positive electrode active material of Example 1 was replaced with Li 1 Ti.
0.9 Mn 1.1 O 4 was used. This Li 1 Ti 0.9 Mn
1.1 O 4 was produced in the same manner as in Example 1 using titanium dioxide, manganese dioxide, and lithium carbonate as starting materials so as to have the above composition. Others,
This is the same as in the first embodiment.
【００２５】本例のリチウム二次電池について，実施例
１と同様の条件により充放電試験を行った。その結果，
図５より知られるごとく，放電平均電位が４．５Ｖを示
す高い放電特性を有することが判った。その他，実施例
１と同様の効果が得られる。The lithium secondary battery of this example was subjected to a charge / discharge test under the same conditions as in Example 1. as a result,
As is known from FIG. 5, it has been found that the battery has high discharge characteristics with an average discharge potential of 4.5V. In addition, the same effect as that of the first embodiment can be obtained.
【図１】実施例１のリチウム二次電池の断面図。FIG. 1 is a cross-sectional view of a lithium secondary battery of Example 1.
【図２】実施例１のリチウム二次電池にかかる充放電特
性の説明図。FIG. 2 is an explanatory diagram of charge / discharge characteristics of the lithium secondary battery of Example 1.
【図３】実施例２のリチウム二次電池にかかる充放電特
性の説明図。3 is an explanatory diagram of charge / discharge characteristics of the lithium secondary battery of Example 2. FIG.
【図４】実施例３のリチウム二次電池にかかる充放電特
性の説明図。FIG. 4 is an explanatory diagram of charge / discharge characteristics of the lithium secondary battery of Example 3.
【図５】実施例４のリチウム二次電池にかかる充放電特
性の説明図。5 is an explanatory diagram of charge / discharge characteristics of the lithium secondary battery of Example 4. FIG.
１０．．．リチウム二次電池， ２．．．正極， ２２．．．正極集電体， ２５．．．正極ケース， ３．．．負極， ３２．．．負極集電体， ３５．．．負極ケース， ４．．．セパレータ， ５．．．非水電解液， ６．．．ガスケット， 10. . . Lithium secondary battery, 2. . . Positive electrode, 22. . . Positive electrode current collector, 25. . . Positive electrode case, 3. . . Negative electrode, 32. . . Negative electrode current collector, 35. . . Negative electrode case, 4. . . Separator, 5. . . Non-aqueous electrolyte solution, 6. . . gasket,
Claims (1)
ウムイオンを吸蔵・放出できる炭素体からなる負極と，
正極と，両者間に介設されるセパレータと，非水電解液
とを有するリチウム二次電池において，正極活物質は，
Ｌｉx Ｔｉy Ｏ4 （ここに，０＜ｘ≦２，１＜ｙ≦
３），もしくはＬｉa Ｔｉb Ｍc Ｏ4 （ここに，０＜ａ
≦２，０＜ｂ≦３，０＜ｃ≦３）で表され，上記Ｍは，
Ｍｎ，Ｆｅ，Ｃｒ，Ｎｉ，Ｃｏ，Ｍｇ，Ｂのうちから選
択される少なくとも一種の元素であることを特徴とする
リチウム二次電池。1. A negative electrode composed of lithium, a lithium alloy, or a carbon body capable of inserting and extracting lithium ions,
In a lithium secondary battery having a positive electrode, a separator interposed therebetween, and a non-aqueous electrolyte, the positive electrode active material is
Li x Ti y O 4 (where 0 <x ≦ 2, 1 <y ≦
3), or Li a Ti b M c O 4 (where 0 <a
≦ 2,0 <b ≦ 3, 0 <c ≦ 3), and the above M is
A lithium secondary battery comprising at least one element selected from Mn, Fe, Cr, Ni, Co, Mg, and B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6335905A JPH08180875A (en) | 1994-12-24 | 1994-12-24 | Lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6335905A JPH08180875A (en) | 1994-12-24 | 1994-12-24 | Lithium secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08180875A true JPH08180875A (en) | 1996-07-12 |
Family
ID=18293687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6335905A Pending JPH08180875A (en) | 1994-12-24 | 1994-12-24 | Lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08180875A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134723A (en) * | 1995-11-07 | 1997-05-20 | Nippon Telegr & Teleph Corp <Ntt> | Non-aqueous electrolyte secondary battery |
| WO1999004442A1 (en) * | 1997-07-15 | 1999-01-28 | Sony Corporation | Non-aqueous electrolyte secondary cell |
| JP2000090933A (en) * | 1998-07-13 | 2000-03-31 | Ngk Insulators Ltd | Lithium secondary battery |
| US6482546B1 (en) * | 1999-03-19 | 2002-11-19 | Sanyo Electric Co., Ltd. | Rechargeable lithium battery |
| JP2003036847A (en) * | 2001-07-25 | 2003-02-07 | National Institute For Materials Science | Lithium-chromium-titanium oxide having ramsdellite type crystal structure, its production method and lithium secondary battery using its oxide |
| US6720112B2 (en) | 2001-10-02 | 2004-04-13 | Valence Technology, Inc. | Lithium cell based on lithiated transition metal titanates |
| JP2006324258A (en) * | 1996-06-14 | 2006-11-30 | Hitachi Maxell Ltd | Lithium secondary battery and its manufacturing method |
-
1994
- 1994-12-24 JP JP6335905A patent/JPH08180875A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134723A (en) * | 1995-11-07 | 1997-05-20 | Nippon Telegr & Teleph Corp <Ntt> | Non-aqueous electrolyte secondary battery |
| JP2006324258A (en) * | 1996-06-14 | 2006-11-30 | Hitachi Maxell Ltd | Lithium secondary battery and its manufacturing method |
| WO1999004442A1 (en) * | 1997-07-15 | 1999-01-28 | Sony Corporation | Non-aqueous electrolyte secondary cell |
| US6120938A (en) * | 1997-07-15 | 2000-09-19 | Sony Corporation | Non-aqueous electrolyte secondary cell |
| JP2000090933A (en) * | 1998-07-13 | 2000-03-31 | Ngk Insulators Ltd | Lithium secondary battery |
| US6482546B1 (en) * | 1999-03-19 | 2002-11-19 | Sanyo Electric Co., Ltd. | Rechargeable lithium battery |
| JP2003036847A (en) * | 2001-07-25 | 2003-02-07 | National Institute For Materials Science | Lithium-chromium-titanium oxide having ramsdellite type crystal structure, its production method and lithium secondary battery using its oxide |
| US6720112B2 (en) | 2001-10-02 | 2004-04-13 | Valence Technology, Inc. | Lithium cell based on lithiated transition metal titanates |
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