JPH0636799A - Lithium secondary battery - Google Patents
Lithium secondary batteryInfo
- Publication number
- JPH0636799A JPH0636799A JP3298928A JP29892891A JPH0636799A JP H0636799 A JPH0636799 A JP H0636799A JP 3298928 A JP3298928 A JP 3298928A JP 29892891 A JP29892891 A JP 29892891A JP H0636799 A JPH0636799 A JP H0636799A
- Authority
- JP
- Japan
- Prior art keywords
- nitride
- negative electrode
- battery
- secondary battery
- lithium 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
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、リチウム二次電池に係
わり、詳しくはＬｉを吸蔵放出可能な金属カルコゲン化
物又は金属酸化物を正極主材とするリチウム二次電池の
負極材料の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium secondary battery, and more particularly to improvement of a negative electrode material for a lithium secondary battery, which contains a metal chalcogenide or a metal oxide capable of occluding and releasing Li as a positive electrode main material.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】近時、
リチウム二次電池の負極材料として、可撓性に優れるこ
と、モッシー状のリチウムが電析するおそれがないこと
などの理由から、コークス等の層状構造を有する炭素材
料が、従来のリチウムやリチウム合金に代わる負極材料
として検討されている。2. Description of the Related Art Recently, in recent years,
As a negative electrode material for a lithium secondary battery, a carbon material having a layered structure such as coke is used as a conventional lithium or lithium alloy for reasons such as excellent flexibility and no possibility of mossy lithium being electrodeposited. It is being investigated as a negative electrode material that replaces.
【０００３】しかしながら、炭素材料の層間隔は総じて
小さいため（たとえばグラファイトのＸ線回折における
格子面（００２）面のｄ値（ｄ002 ）は３．３５〜３．
５Å程度である）、リチウムの吸蔵放出が円滑に行われ
ず、高容量の電池を得難いなどの問題があった。However, the layer spacing of the carbon material is generally small (for example, the d-value (d 002 ) of the lattice plane (002) plane in X-ray diffraction of graphite is 3.35-3.
There is a problem in that lithium is not occluded and released smoothly and it is difficult to obtain a high-capacity battery.
【０００４】また、充放電サイクルを重ねるうちに層状
構造が徐々に崩壊して、電池容量が漸減するという問題
も指摘されていた。It has also been pointed out that the layered structure gradually collapses during repeated charge / discharge cycles, resulting in a gradual decrease in battery capacity.
【０００５】本発明は、これらの問題を解決するべくな
されたものであって、その目的とするところは、従来の
炭素材料を負極主材とするリチウム二次電池に比し、容
量の大きいリチウム二次電池を提供するにある。The present invention has been made to solve these problems, and an object thereof is to provide a lithium battery having a large capacity as compared with a conventional lithium secondary battery using a carbon material as a negative electrode main material. To provide a secondary battery.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明に係るリチウム二次電池は、Ｌｉを吸蔵放出可
能な金属カルコゲン化物又は金属酸化物を主材とする正
極と、Ｌｉを吸蔵放出可能な無機化合物を主材とする負
極と、これら正負両極間に介装されたセパレータとを備
えてなるリチウム二次電池であって、前記無機化合物が
窒化物又は炭化物であることを特徴とする。A lithium secondary battery according to the present invention for achieving the above object comprises a positive electrode mainly composed of a metal chalcogenide or a metal oxide capable of occluding and releasing Li, and a occlude Li. A lithium secondary battery comprising a negative electrode containing a releasable inorganic compound as a main material, and a separator interposed between these positive and negative electrodes, wherein the inorganic compound is a nitride or a carbide. To do.
【０００７】本発明における正極材料たるＬｉを吸蔵放
出可能な金属カルコゲン化物又は金属酸化物は、Ｌｉを
吸蔵放出可能なものであれば特に制限されず、金属カル
コゲン化物としてはＴｉＳ2 、ＭｏＳ2 等の層状構造の
金属カルコゲン化物が例示され、また金属酸化物として
はＬｉＣｏＯ2 、ＬｉＭｎＯ2 、ＬｉＮｉＯ2 、ＬｉＦ
ｅＯ2 、ＴｉＯ2 、Ｖ2 Ｏ5 等の所謂トンネル状の空孔
を有する金属酸化物が例示される。これらの金属カルコ
ゲン化物又は金属酸化物は、それぞれを一種単独で用い
てもよく、必要に応じて二種以上を併用してもよい。上
記金属カルコゲン化物又は金属酸化物は、アセチレンブ
ラック、カーボンブラック等の導電剤及びＰＴＦＥ（ポ
リテトラフルオロエチレン）、ＰＦＶ（ポリフッ化ビニ
リデン）等の結着剤と混練して正極合剤として使用され
る。The metal chalcogenide or metal oxide capable of occluding and releasing Li as the positive electrode material in the present invention is not particularly limited as long as it can occlude and release Li, and the metal chalcogenide can be TiS 2 , MoS 2 or the like. Examples of the metal chalcogenide having a layered structure are as follows, and the metal oxides include LiCoO 2 , LiMnO 2 , LiNiO 2 , and LiF.
Examples are metal oxides having so-called tunnel-shaped holes such as eO 2 , TiO 2 , and V 2 O 5 . These metal chalcogenides or metal oxides may be used alone or in combination of two or more if necessary. The above metal chalcogenide or metal oxide is kneaded with a conductive agent such as acetylene black or carbon black and a binder such as PTFE (polytetrafluoroethylene) or PFV (polyvinylidene fluoride) to be used as a positive electrode mixture. .
【０００８】本発明における負極活物質たるＬｉを吸蔵
放出可能な窒化物としては、窒化ホウ素（ＢＮ）、窒化
マンガン（Ｍｎ4 Ｎ、Ｍｎ2 Ｎなど）、窒化リチウム
（Ｌｉ 3 Ｎ）が例示される。また、Ｌｉを吸蔵放出可能
な炭化物としては、炭化ホウ素（ＢＣ、Ｂ4 Ｃなど）、
炭化リチウム（Ｌｉ2 Ｃ2 ）が例示される。層状構造を
有するこれらの窒化物又は炭化物は、炭素材料に比し層
間隔が大きいため、充放電時の負極へのＬｉの吸蔵放出
が円滑に進行する。因みに、窒化物のＸ線回折における
格子面（００２）面のｄ値（ｄ002 ）は１０〜１５Åで
あり、炭素材料の３．３５〜３．５Åに比し極めて大き
な値である。これらの窒化物又は炭化物は、一種単独を
用いてもよく、必要に応じて２種以上を併用してもよ
い。上記窒化物又は炭化物は、常法により、ＰＴＦＥ、
ＰＦＶ等の結着剤と混練して負極合剤として使用され
る。なお、窒化物は半導体としての性質を有するものが
多いので、その場合はアセチレンブラック等の導電剤を
添加して導電性を付与する必要がある。Storage of Li as the negative electrode active material in the present invention
Boron nitride (BN), nitride
Manganese (MnFourN, Mn2N, etc.), lithium nitride
(Li 3N) is illustrated. Also, Li can be occluded and released
Examples of such carbides include boron carbide (BC, BFourC etc.),
Lithium carbide (Li2C2) Is illustrated. Layered structure
These nitrides or carbides that have a layer compared to carbon materials
Due to the large interval, the absorption and release of Li to the negative electrode during charging and discharging
Will proceed smoothly. Incidentally, in X-ray diffraction of nitride
D value of the lattice plane (002) plane (d002) Is 10 to 15Å
Yes, extremely large compared to 3.35 to 3.5 liters of carbon material
Value. These nitrides or carbides may be used alone.
May be used, or may be used in combination of two or more if necessary.
Yes. The above-mentioned nitrides or carbides can be obtained by using conventional methods such as PTFE,
Used as a negative electrode mixture after kneading with a binder such as PFV
It It should be noted that the nitride has a property as a semiconductor.
In that case, use a conductive agent such as acetylene black.
It is necessary to add it to give conductivity.
【０００９】電解質としては、プロピレンカーボネート
にＬｉＰＦ6 を溶かした溶液など、リチウム二次電池用
として従来使用されている種々の非水電解液を用いるこ
ともできるが、ＬｉＩ（ヨウ化リチウム）等の固体電解
質を用いるようにすれば、これをセパレータに兼用する
ことができるため、電池のエネルギー密度を高めること
ができるとともに、オールソリッドステート化により、
液漏れのない、メンテナンスフリーのリチウム二次電池
が得られるので、信頼性の点で有利である。As the electrolyte, various non-aqueous electrolytes conventionally used for lithium secondary batteries, such as a solution of LiPF 6 in propylene carbonate, can be used, but LiI (lithium iodide) or the like can also be used. If a solid electrolyte is used, it can also be used as a separator, so that it is possible to increase the energy density of the battery, and by using an all solid state,
Since a maintenance-free lithium secondary battery without liquid leakage can be obtained, it is advantageous in terms of reliability.
【００１０】[0010]
【作用】本発明に係るリチウム二次電池においては、層
間隔の大きい窒化物又は炭化物が負極材料として使用さ
れているので、負極においてＬｉの吸蔵放出が円滑に進
行する。このため、活物質の利用率が高く、電池の容量
が大きくなる。In the lithium secondary battery according to the present invention, since a nitride or a carbide having a large layer gap is used as a negative electrode material, the occlusion and release of Li in the negative electrode progress smoothly. Therefore, the utilization rate of the active material is high, and the capacity of the battery is large.
【００１１】[0011]
【実施例】以下、本発明を実施例に基づいてさらに詳細
に説明するが、本発明は下記実施例により何ら限定され
るものではなく、その要旨を変更しない範囲において適
宜変更して実施することが可能なものである。The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited by the following examples, and various modifications can be made without departing from the scope of the invention. Is possible.
【００１２】（実施例１） 〔正極の作製〕炭酸コバルトと炭酸リチウムとをＣｏ：
Ｌｉの原子比１：１で混合した後、空気中にて９００°
Ｃで２０時間熱処理してＬｉＣｏＯ2 を得た。このよう
して得た正極材料としてのＬｉＣｏＯ2 に、導電剤とし
てのアセチレンブラックと、結着剤としてのＰＴＦＥと
を、重量比９０：５：５の比率で混合して正極合剤を得
た。この正極合剤を集電体としてのアルミニウムのラス
板に圧延し、２５０°Ｃで２時間真空下で熱処理して正
極を作製した。Example 1 [Preparation of Positive Electrode] Cobalt carbonate and lithium carbonate were mixed with Co:
After mixing Li at an atomic ratio of 1: 1 in air, 900 °
To obtain a LiCoO 2 and 20 hours heat treatment at C. LiCoO 2 as a positive electrode material thus obtained was mixed with acetylene black as a conductive agent and PTFE as a binder in a weight ratio of 90: 5: 5 to obtain a positive electrode mixture. . This positive electrode mixture was rolled into an aluminum lath plate as a current collector and heat-treated under vacuum at 250 ° C. for 2 hours to produce a positive electrode.
【００１３】〔負極の作製〕４００メッシュパスの３種
の窒化物（Ｍｎ4 Ｎ、ＢＮ、Ｌｉ3 Ｎ）のそれぞれに、
導電剤としてのアセチレンブラックと、結着剤としての
ＰＴＦＥとを、重量比９０：５：５の比率で混合して負
極合剤を得た。これらの負極合剤を、集電体としてのア
ルミニウムのラス板にそれぞれ圧延し、２５０°Ｃで２
時間真空下で熱処理して、各窒化物を主材とする３種の
負極を作製した。[Fabrication of Negative Electrode] Each of three kinds of nitrides (Mn 4 N, BN, Li 3 N) of 400 mesh pass
Acetylene black as a conductive agent and PTFE as a binder were mixed in a weight ratio of 90: 5: 5 to obtain a negative electrode mixture. These negative electrode mixtures were each rolled on a lath plate of aluminum as a current collector, which was heated at 250 ° C for 2 hours.
Heat treatment was performed under vacuum for 3 hours to prepare three types of negative electrodes containing each nitride as a main material.
【００１４】〔電解液の調製〕プロピレンカーボネート
に、ＬｉＰＦ6 を１モル／リットル溶かして非水電解液
を調製した。[Preparation of Electrolyte Solution] LiPF 6 was dissolved in propylene carbonate at 1 mol / liter to prepare a non-aqueous electrolyte solution.
【００１５】〔電池ＢＡ１〜３の作製〕以上の正負両極
及び電解質を用いて円筒形非水電解液二次電池を作製し
た。窒化物としてＭｎ4 Ｎを用いたものをＢＡ１、ＢＮ
を用いたものをＢＡ２、Ｌｉ3Ｎを用いたものをＢＡ３
で表す。なお、イオン透過性のポリプロピレン製の微孔
性薄膜をセパレータとして用いた。[Production of Batteries BA1 to 3] A cylindrical non-aqueous electrolyte secondary battery was produced using the positive and negative electrodes and the electrolyte described above. BA1, BN using Mn 4 N as a nitride
That using a the BA2, Li 3 N those using BA3
It is represented by. An ion-permeable polypropylene microporous thin film was used as a separator.
【００１６】図１は作製した電池ＢＡ１（２，３）の断
面図であり、同図に示す電池ＢＡ１は、正極１及び負極
２、これら両電極を離隔するセパレータ３、正極リード
４、負極リード５、正極外部端子６、負極缶７などから
なる。正極１及び負極２は非水電解液が注入されたセパ
レータ３を介して渦巻き状に巻き取られた状態で負極缶
７内に収容されており、正極１は正極リード４を介して
正極外部端子６に、また負極２は負極リード５を介して
負極缶７に接続され、電池ＢＡ１内部で生じた化学エネ
ルギーを電気エネルギーとして外部へ取り出し得るよう
になっている。FIG. 1 is a cross-sectional view of the manufactured battery BA1 (2, 3). The battery BA1 shown in FIG. 1 includes a positive electrode 1 and a negative electrode 2, a separator 3 separating these two electrodes, a positive electrode lead 4 and a negative electrode lead. 5, a positive electrode external terminal 6, a negative electrode can 7 and the like. The positive electrode 1 and the negative electrode 2 are housed in the negative electrode can 7 in a state of being spirally wound via the separator 3 into which the nonaqueous electrolytic solution is injected, and the positive electrode 1 is connected to the positive electrode external terminal via the positive electrode lead 4. 6, and the negative electrode 2 is connected to the negative electrode can 7 via the negative electrode lead 5 so that the chemical energy generated inside the battery BA1 can be taken out as electric energy to the outside.
【００１７】（実施例２）窒化物に代えて３種の炭化物
（Ｌｉ2 Ｃ2 、ＢＣ、Ｂ4 Ｃ）を用いるとともに、アセ
ンチレンブラックを配合せずに炭化物とＰＴＦＥとを重
量比９５：５の比率で混合して負極を作製したこと以外
は、実施例１と同様にして、本発明に係る電池を作製し
た。炭化物としてＬｉ2 Ｃ2 を用いたものをＢＡ４、Ｂ
Ｃを用いたものをＢＡ５、Ｂ4 Ｃを用いたものをＢＡ６
で表す。(Example 2) Three kinds of carbides (Li 2 C 2 , BC, B 4 C) were used in place of the nitride, and the carbide and PTFE were mixed in a weight ratio of 95 without adding atentilen black. A battery according to the present invention was prepared in the same manner as in Example 1 except that the negative electrode was prepared by mixing the mixture at a ratio of 5: 5. BA4 and B using Li 2 C 2 as a carbide
BA5 that using a C, B 4 those using C BA6
It is represented by.
【００１８】（比較例１）負極材料としてコークスを用
い、これとＰＴＦＥとを重量比９５：５の比率で混合し
て負極を作製したこと以外は、実施例１と同様にして、
比較電池ＢＣ１を作製した。Comparative Example 1 Coke was used as the negative electrode material, and this was mixed with PTFE at a weight ratio of 95: 5 to prepare a negative electrode, and the same procedure as in Example 1 was repeated.
A comparative battery BC1 was produced.
【００１９】（各電池の充放電特性）図２及び図３は、
本発明に係る電池ＢＡ１〜６及び比較電池ＢＣ１の２０
０ｍＡ（定電流放電）における２サイクル目以降の充放
電特性を、縦軸に電圧（Ｖ）を横軸に時間（ｈ）をとっ
て表したものであり、同図より本発明に係る電池ＢＡ１
〜６は比較電池ＢＣ１に比し、優れた充放電特性を有す
ることが理解される。なお、比較電池ＢＣ１の充放電特
性は、比較の便宜のために、図２及び図３の両図にそれ
ぞれ示してある。(Charge / Discharge Characteristics of Each Battery) FIGS. 2 and 3 show
20 of the batteries BA1 to 6 according to the present invention and the comparative battery BC1
The charging / discharging characteristics after the second cycle at 0 mA (constant current discharge) are shown by taking the voltage (V) on the vertical axis and the time (h) on the horizontal axis, and the battery BA1 according to the present invention is shown in FIG.
It is understood that the samples Nos. 6 to 6 have excellent charge / discharge characteristics as compared with the comparative battery BC1. The charge / discharge characteristics of the comparative battery BC1 are shown in both FIGS. 2 and 3 for convenience of comparison.
【００２０】叙上の実施例では本発明を円筒形電池に適
用する場合の具体例について説明したが、電池の形状に
特に制限はなく、本発明はコイン形、ボタン形、水平断
面瓢箪形等、種々の形状のリチウム二次電池に適用し得
るものである。In the above embodiment, a specific example in which the present invention is applied to a cylindrical battery is described, but the shape of the battery is not particularly limited, and the present invention is a coin type, a button type, a horizontal cross-section gourd type or the like. It can be applied to lithium secondary batteries of various shapes.
【００２１】[0021]
【発明の効果】本発明に係るリチウム二次電池において
は、負極材料として層間隔の大きい窒化物又は炭化物が
用いられているので、炭素材料を用いたものに比し、負
極におけるＬｉの吸蔵放出が円滑に行われる結果、電池
容量が大きいなど、本発明は優れた特有の効果を奏す
る。INDUSTRIAL APPLICABILITY In the lithium secondary battery according to the present invention, since a nitride or a carbide having a large gap between layers is used as the negative electrode material, the absorption and desorption of Li in the negative electrode is greater than that using the carbon material. As a result, the present invention has excellent unique effects such as a large battery capacity.
【図１】本発明に係る電池ＢＡ１の断面図である。1 is a cross-sectional view of a battery BA1 according to the present invention.
【図２】本発明に係る電池ＢＡ１〜３及び比較電池ＢＣ
１の充放電特性図である。FIG. 2 shows batteries BA1 to BA3 according to the present invention and a comparative battery BC.
It is a charge / discharge characteristic chart of No. 1.
【図３】本発明に係る電池ＢＡ４〜６及び比較電池ＢＣ
１の充放電特性図である。FIG. 3 shows batteries BA4 to BA6 according to the present invention and a comparative battery BC.
It is a charge / discharge characteristic chart of No. 1.
ＢＴ 電池 １ 正極 ２ 負極 ３ セパレータ ４ 正極リード ５ 負極リード ６ 正極外部端子 ７ 負極缶 BT battery 1 positive electrode 2 negative electrode 3 separator 4 positive electrode lead 5 negative electrode lead 6 positive electrode external terminal 7 negative electrode can
───────────────────────────────────────────────────── フロントページの続き (72)発明者 古川 修弘 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Nobuhiro Furukawa 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.
Claims (3)
又は金属酸化物を主材とする正極と、Ｌｉを吸蔵放出可
能な無機化合物を主材とする負極と、これら正負両極間
に介装されたセパレータとを備えてなるリチウム二次電
池であって、前記無機化合物が窒化物又は炭化物である
ことを特徴とするリチウム二次電池。1. A positive electrode mainly composed of a metal chalcogenide or metal oxide capable of occluding and releasing Li, a negative electrode mainly composed of an inorganic compound capable of occluding and releasing Li, and a positive electrode and a negative electrode interposed between the positive and negative electrodes. A lithium secondary battery including a separator, wherein the inorganic compound is a nitride or a carbide.
は窒化リチウムである請求項１記載のリチウム二次電
池。2. The lithium secondary battery according to claim 1, wherein the nitride is boron nitride, manganese nitride or lithium nitride.
である請求項１記載のリチウム二次電池。3. The lithium secondary battery according to claim 1, wherein the carbide is boron carbide or lithium carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3298928A JP3066142B2 (en) | 1991-11-14 | 1991-11-14 | Lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3298928A JP3066142B2 (en) | 1991-11-14 | 1991-11-14 | Lithium secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0636799A true JPH0636799A (en) | 1994-02-10 |
| JP3066142B2 JP3066142B2 (en) | 2000-07-17 |
Family
ID=17866000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3298928A Expired - Fee Related JP3066142B2 (en) | 1991-11-14 | 1991-11-14 | Lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3066142B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0752728A3 (en) * | 1995-07-05 | 1997-01-22 | Nippon Telegraph And Telephone Corporation | Negative electrode material for use in lithium secondary batteries, its manufacture, and lithium secondary batteries incorporating this material |
| WO1997026683A1 (en) * | 1996-01-15 | 1997-07-24 | The University Court Of The University Of St. Andrews | Improvements in or relating to electrochemical cells |
| EP1168472A1 (en) * | 2000-06-30 | 2002-01-02 | Matsushita Electric Industrial Co., Ltd. | Lithium secondary battery |
| JP2011029184A (en) * | 2009-07-22 | 2011-02-10 | Belenos Clean Power Holding Ag | New electrode material, in particular for rechargeable lithium ion battery |
| CN104600308A (en) * | 2015-01-20 | 2015-05-06 | 浙江大学 | Lithium ion battery negative electrode material and method for preparing membrane electrode thereof |
| JP2020198288A (en) * | 2019-05-28 | 2020-12-10 | トヨタ自動車株式会社 | Active material and fluoride ion battery |
-
1991
- 1991-11-14 JP JP3298928A patent/JP3066142B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0752728A3 (en) * | 1995-07-05 | 1997-01-22 | Nippon Telegraph And Telephone Corporation | Negative electrode material for use in lithium secondary batteries, its manufacture, and lithium secondary batteries incorporating this material |
| WO1997026683A1 (en) * | 1996-01-15 | 1997-07-24 | The University Court Of The University Of St. Andrews | Improvements in or relating to electrochemical cells |
| EP1168472A1 (en) * | 2000-06-30 | 2002-01-02 | Matsushita Electric Industrial Co., Ltd. | Lithium secondary battery |
| US6537702B2 (en) | 2000-06-30 | 2003-03-25 | Matsushita Electric Industrial Co., Ltd. | Lithium secondary battery |
| JP2011029184A (en) * | 2009-07-22 | 2011-02-10 | Belenos Clean Power Holding Ag | New electrode material, in particular for rechargeable lithium ion battery |
| CN104600308A (en) * | 2015-01-20 | 2015-05-06 | 浙江大学 | Lithium ion battery negative electrode material and method for preparing membrane electrode thereof |
| JP2020198288A (en) * | 2019-05-28 | 2020-12-10 | トヨタ自動車株式会社 | Active material and fluoride ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3066142B2 (en) | 2000-07-17 |
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