JPH10149813A - Lithium secondary battery - Google Patents
Lithium secondary batteryInfo
- Publication number
- JPH10149813A JPH10149813A JP8323475A JP32347596A JPH10149813A JP H10149813 A JPH10149813 A JP H10149813A JP 8323475 A JP8323475 A JP 8323475A JP 32347596 A JP32347596 A JP 32347596A JP H10149813 A JPH10149813 A JP H10149813A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- solid electrolyte
- electrolyte
- polymer solid
- carbon
- 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]
【発明が属する技術分野】本発明は、正極と、高分子固
体電解質と、炭素をリチウムイオン吸蔵材とする負極と
を備えるリチウム二次電池に係わり、詳しくは充放電サ
イクル特性を改善することを目的とした、負極の改良に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium secondary battery having a positive electrode, a solid polymer electrolyte, and a negative electrode using carbon as a lithium ion storage material. The present invention relates to an improvement of a negative electrode.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来、
リチウム二次電池の電解質として、リチウムイオン伝導
性に優れる液体電解質が使用されているが、液体電解質
には、漏液、電極物質の溶出などの問題がある。2. Description of the Related Art
Liquid electrolytes having excellent lithium ion conductivity are used as electrolytes for lithium secondary batteries, but liquid electrolytes have problems such as liquid leakage and elution of electrode materials.
【０００３】そこで、近年、このような問題が無い固体
電解質、とくに薄膜成形が容易であり、比較的安価であ
る高分子固体電解質が、リチウム二次電池の電解質とし
て注目され、その実用化のための研究が盛んに行われて
いる。[0003] In recent years, a solid electrolyte free from such problems, especially a polymer solid electrolyte which is easy to form a thin film and is relatively inexpensive, has attracted attention as an electrolyte for a lithium secondary battery. Research is being actively conducted.
【０００４】また、従来、リチウム二次電池の負極材料
として、金属リチウムが使用されていたが、金属リチウ
ムには樹枝状の電析リチウムの成長に因り内部短絡が起
こる虞れがあった。そこで、近年、このような問題の無
い黒鉛、コークス等の炭素が負極材料として提案されて
いる。Conventionally, metallic lithium has been used as a negative electrode material of a lithium secondary battery. However, internal short-circuiting may occur in metallic lithium due to the growth of dendritic lithium. Therefore, in recent years, carbon such as graphite and coke which does not have such a problem has been proposed as a negative electrode material.
【０００５】しかしながら、負極のリチウムイオン吸蔵
材として炭素を使用し、電解質として高分子固体電解質
を使用したリチウム二次電池には、充放電サイクル特性
が良くないという問題がある。これは、充放電時のリチ
ウムイオンの吸蔵及び放出に伴う負極の体積変化が大き
いために、炭素が負極から脱落したり、負極と高分子固
体電解質との密着性が低下したりするからである。[0005] However, a lithium secondary battery using carbon as a lithium ion storage material of a negative electrode and using a solid polymer electrolyte as an electrolyte has a problem that charge / discharge cycle characteristics are not good. This is because the volume change of the negative electrode due to occlusion and release of lithium ions during charging and discharging is large, so that carbon may fall off from the negative electrode or the adhesion between the negative electrode and the solid polymer electrolyte may be reduced. .
【０００６】本発明は、上述の問題を解決するべくなさ
れたものであって、負極のリチウムイオン吸蔵材として
炭素を使用し、電解質として高分子固体電解質を使用し
たリチウム二次電池の充放電サイクル特性を改善するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is directed to a charge / discharge cycle of a lithium secondary battery using carbon as a lithium ion storage material of a negative electrode and a solid polymer electrolyte as an electrolyte. The purpose is to improve the characteristics.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めの本発明に係るリチウム二次電池（本発明電池）は、
正極と、高分子固体電解質ＳＡと、炭素をリチウムイオ
ン吸蔵材とする負極とを備え、負極が、ヤング弾性率
０．１×１０4 〜３．５×１０4 ｋｇｆ／ｃｍ2の高分
子固体電解質ＳＢを含有するリチウム二次電池である。To achieve the above object, a lithium secondary battery according to the present invention (battery of the present invention) comprises:
A positive electrode, a polymer solid electrolyte SA, and a negative electrode using carbon as a lithium ion storage material, wherein the negative electrode has a Young's modulus of 0.1 × 10 4 to 3.5 × 10 4 kgf / cm 2 . This is a lithium secondary battery containing an electrolyte SB.
【０００８】炭素としては、黒鉛、石油コークス、クレ
ゾール樹脂焼成炭素、フラン樹脂焼成炭素、ポリアクリ
ロニトリル焼成炭素、気相成長炭素、メソフェーズピッ
チ焼成炭素が例示される。これらの炭素は、充電及び放
電によりリチウムイオンを電気化学的に吸蔵及び放出す
ることが可能なものである。本発明電池の負極は、例え
ば、これらの炭素を結着剤とともに混練してスラリーを
調製し、このスラリーを集電体に塗布し、乾燥して、炭
素をリチウムイオン吸蔵材とする負極（炭素負極）を作
製した後、これに高分子固体電解質ＳＢを含有せしめる
ことにより作製される。Examples of the carbon include graphite, petroleum coke, cresol resin fired carbon, furan resin fired carbon, polyacrylonitrile fired carbon, vapor grown carbon, and mesophase pitch fired carbon. These carbons can electrochemically occlude and release lithium ions by charging and discharging. For the negative electrode of the battery of the present invention, for example, a slurry is prepared by kneading these carbons together with a binder, the slurry is applied to a current collector, and dried to prepare a negative electrode (carbon having carbon as a lithium ion storage material). After the negative electrode) is manufactured, the negative electrode is manufactured by adding a polymer solid electrolyte SB thereto.
【０００９】炭素負極に高分子固体電解質ＳＢを含有せ
しめる方法としては、重合により高分子固体電解質ＳＢ
のマトリクスを形成するオリゴマーに電解質塩を溶かし
た溶液、又は、該オリゴマーと溶媒及び電解質塩からな
る電解液とを混合して得た溶液を、負極内部に浸透せし
めた後、浸透せるオリゴマーを重合する方法が挙げられ
る。重合法としては、電子線重合、熱重合、紫外線重合
が例示される。[0009] As a method for incorporating the polymer solid electrolyte SB into the carbon anode, the polymer solid electrolyte SB is produced by polymerization.
After a solution obtained by dissolving an electrolyte salt in an oligomer that forms a matrix of the above or a solution obtained by mixing the oligomer and an electrolyte solution comprising a solvent and an electrolyte salt is allowed to penetrate inside the negative electrode, the permeated oligomer is polymerized. Method. Examples of the polymerization method include electron beam polymerization, thermal polymerization, and ultraviolet polymerization.
【００１０】炭素負極に含有せしめる高分子固体電解質
ＳＢは、セパレータを兼ねる高分子固体電解質ＳＡと同
種のものであってもよい。高分子固体電解質ＳＢの溶媒
としては、ポリエチレンオキシド、ポリプロピレンオキ
シド、ポリエチレンオキシドとポリプロピレンオキシド
との共重合体、ポリエーテルイミド、ポリエーテルスル
ホン、ポリスルホン、ポリシロキサンが例示される。ま
た、高分子固体電解質ＳＢの電解質塩としては、ＬｉＰ
Ｆ6 、ＬｉＡｓＦ6 、ＬｉＳｂＦ6 、ＬｉＣｌＯ4 、Ｌ
ｉＢＦ4 、ＬｉＣＦ3 ＳＯ3 、ＬｉＮ（ＣＦ3 ＳＯ2 ）
2 が例示される。The solid polymer electrolyte SB contained in the carbon negative electrode may be of the same type as the solid polymer electrolyte SA serving also as a separator. Examples of the solvent for the polymer solid electrolyte SB include polyethylene oxide, polypropylene oxide, a copolymer of polyethylene oxide and polypropylene oxide, polyetherimide, polyether sulfone, polysulfone, and polysiloxane. As the electrolyte salt of the polymer solid electrolyte SB, LiP
F 6 , LiAsF 6 , LiSbF 6 , LiClO 4 , L
iBF 4 , LiCF 3 SO 3 , LiN (CF 3 SO 2 )
2 is exemplified.
【００１１】炭素負極に含有せしめる高分子固体電解質
ＳＢのヤング弾性率は、０．１×１０4 〜３．５×１０
4 ｋｇｆ／ｃｍ2 に規制される。ヤング弾性率がこの範
囲を外れると、良好な充放電サイクル特性が得られな
い。また、炭素負極に含有せしめる高分子固体電解質Ｓ
Ｂの好ましい量は、７．５〜２５重量％である。含有量
が７．５重量％未満の場合は過少なため本発明の効果が
充分に得られず、一方２５重量％を超えた場合は、活物
質の量を減らす必要があり、容量が低下する。The Young's modulus of the solid polymer electrolyte SB contained in the carbon anode is 0.1 × 10 4 to 3.5 × 10 4
Regulated to 4 kgf / cm 2 . If the Young's modulus is out of this range, good charge / discharge cycle characteristics cannot be obtained. Further, the polymer solid electrolyte S contained in the carbon anode
The preferred amount of B is between 7.5 and 25% by weight. When the content is less than 7.5% by weight, the effect of the present invention cannot be sufficiently obtained because the content is too small. On the other hand, when the content exceeds 25% by weight, the amount of the active material needs to be reduced, and the capacity decreases. .
【００１２】本発明は、炭素負極の改良に関する。それ
ゆえ、正極には、Ｌｉ含有コバルト酸化物、Ｌｉ含有バ
ナジウム酸化物、Ｌｉ含有マンガン酸化物、Ｌｉ含有ニ
ッケル酸化物、Ｌｉ含有鉄酸化物、Ｌｉ含有クロム酸化
物、Ｌｉ含有チタン酸化物などの、リチウム二次電池用
として従来公知の正極活物質を特に制限無く用いること
ができる。[0012] The present invention relates to improvements in carbon anodes. Therefore, for the positive electrode, Li-containing cobalt oxide, Li-containing vanadium oxide, Li-containing manganese oxide, Li-containing nickel oxide, Li-containing iron oxide, Li-containing chromium oxide, Li-containing titanium oxide, etc. Conventionally known positive electrode active materials for lithium secondary batteries can be used without any particular limitation.
【００１３】本発明電池は、炭素負極が所定のヤング弾
性率の高分子固体電解質ＳＢを含有しているので、充放
電サイクル特性に優れる。この理由は、高分子固体電解
質ＳＢが発現する弾性が充放電時の炭素の体積変化を吸
収するため、充放電時の負極全体の体積変化が小さくな
り、炭素の極板からの脱落や、負極と高分子固体電解質
ＳＡとの密着性の低下が抑制されるためと推察される。The battery of the present invention is excellent in charge-discharge cycle characteristics because the carbon negative electrode contains the polymer solid electrolyte SB having a predetermined Young's modulus. The reason is that the elasticity expressed by the polymer solid electrolyte SB absorbs the volume change of carbon at the time of charge / discharge, so that the volume change of the whole negative electrode at the time of charge / discharge becomes small, and the carbon drops from the electrode plate, It is speculated that the decrease in adhesion between the polymer and the polymer solid electrolyte SA is suppressed.
【００１４】[0014]
【実施例】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で適宜変更して実施す
ることが可能なものである。EXAMPLES The present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples and can be carried out by appropriately changing the scope of the invention without changing its gist. It is something.
【００１５】〔正極の作製〕正極活物質としてのＬｉＣ
ｏＯ2 粉末８５重量部と、導電剤としての炭素粉末１０
重量部と、結着剤としてのポリフッ化ビニリデン粉末５
重量部のＮＭＰ（Ｎ−メチル−２−ピロリドン）溶液と
を混合してスラリーを調製し、このスラリーをフェライ
ト系ステンレス鋼からなる集電体の片面にドクターブレ
ード法により塗布して活物質層を形成した後、１５０°
Ｃで乾燥して、直径１０ｍｍの円盤状の正極を作製し
た。活物質層の乾固後の厚みは約８０μｍであった。[Preparation of positive electrode] LiC as positive electrode active material
85 parts by weight of oO 2 powder and carbon powder 10 as a conductive agent
Parts by weight and polyvinylidene fluoride powder 5 as a binder
A slurry is prepared by mixing a NPT (N-methyl-2-pyrrolidone) solution in parts by weight with NMP (N-methyl-2-pyrrolidone), and the slurry is applied to one surface of a current collector made of ferritic stainless steel by a doctor blade method to form an active material layer. After forming, 150 °
C to produce a disk-shaped positive electrode having a diameter of 10 mm. The thickness of the active material layer after drying was about 80 μm.
【００１６】〔負極の作製〕黒鉛粉末９５重量部とポリ
フッ化ビニリデン粉末５重量部のＮＭＰ溶液とを混合し
てスラリーを調製し、このスラリーをフェライト系ステ
ンレス鋼からなる集電体の片面にドクターブレード法に
より塗布して活物質層を形成した後、１５０°Ｃで乾燥
して、直径１０ｍｍの円盤状の負極を作製した。活物質
層の乾固後の厚みは約７０μｍであった。[Preparation of Negative Electrode] A slurry was prepared by mixing 95 parts by weight of graphite powder and 5 parts by weight of polyvinylidene fluoride powder to prepare a slurry, and the slurry was applied to one surface of a current collector made of ferritic stainless steel by a doctor. After coating by a blade method to form an active material layer, the active material layer was dried at 150 ° C. to produce a disk-shaped negative electrode having a diameter of 10 mm. The thickness of the active material layer after drying was about 70 μm.
【００１７】次いで、化学式：ＣＨ2 ＝ＣＨ−ＣＯＯ−
（ＣＨ2 −ＣＨ2 −Ｏ）n −ＣＨ2−ＣＨ3 （ｎ：約４
００）で表されるアクリレート系オリゴマー１重量部
と、エチレンカーボネート４００ｍｌとジメチルカーボ
ネート６００ｍｌとの混合溶媒にＬｉＣｌＯ4 を１モル
溶かした電解液５重量部、４．５重量部、４重量部、
３．５重量部、３重量部、２．５重量部、２重量部、
１．５重量部、１重量部、０．７５重量部又は０．５重
量部とを混合し、かくして得た混合液に、上記の負極を
浸漬し、該混合液を負極内部に浸透させた後、エレクト
ロカーテン式電子線照射装置（出力：２００ｋＶ；照射
線量：２Ｍｒａｄ）を使用して、浸透せるアクリレート
系オリゴマーを重合して、ゲル状の高分子固体電解質Ｓ
Ｂを含有する負極を作製した。また、別途、上記と同じ
アクリレート系オリゴマー９４重量部にＬｉＣｌＯ4 ６
重量部を溶かした溶液に、上記の負極を浸漬し、エレク
トロカーテン式電子線照射装置を使用して、浸透せるア
クリレート系オリゴマーを重合して、固形の高分子固体
電解質ＳＢを含有する負極を作製した。なお、負極の理
論容量を正極のそれの約１．１倍とした。Next, the chemical formula: CH 2 ＣＨCH—COO—
(CH 2 —CH 2 —O) n —CH 2 —CH 3 (n: about 4
5 parts by weight of an electrolytic solution obtained by dissolving 1 mol of LiClO 4 in a mixed solvent of 1 part by weight of an acrylate oligomer represented by the formula (00) and 400 ml of ethylene carbonate and 600 ml of dimethyl carbonate, 4.5 parts by weight, 4 parts by weight,
3.5 parts by weight, 3 parts by weight, 2.5 parts by weight, 2 parts by weight,
1.5 parts by weight, 1 part by weight, 0.75 parts by weight or 0.5 parts by weight were mixed, and the above-described negative electrode was immersed in the mixed solution thus obtained, and the mixed solution was permeated into the inside of the negative electrode. Thereafter, the acrylate-based oligomer to be permeated is polymerized by using an electron curtain type electron beam irradiation apparatus (output: 200 kV; irradiation dose: 2 Mrad), and a gel polymer solid electrolyte S
A negative electrode containing B was produced. Separately, 94 parts by weight of the same acrylate oligomer as above was added to LiClO 4
The above negative electrode is immersed in a solution in which parts by weight are dissolved, and an acrylate-based oligomer to be permeated is polymerized using an electro-curtain type electron beam irradiation device to produce a negative electrode containing a solid polymer solid electrolyte SB. did. The theoretical capacity of the negative electrode was about 1.1 times that of the positive electrode.
【００１８】次いで、上記と同じアクリレート系オリゴ
マー９４重量部にＬｉＣｌＯ4 ６重量部を溶かした溶液
を、上記の高分子固体電解質ＳＢを含有する負極の片面
に塗布し、先と同じエレクトロカーテン式電子線照射装
置（出力：２００ｋＶ；照射線量：２Ｍｒａｄ）を使用
して、塗布せるアクリレート系オリゴマーを重合して、
負極の上にセパレータを兼ねる高分子固体電解質ＳＡか
らなる層を形成した。この層の厚みは約５０μｍであっ
た。Next, a solution obtained by dissolving 6 parts by weight of LiClO 4 in 94 parts by weight of the same acrylate-based oligomer as described above is applied to one surface of the negative electrode containing the solid polymer electrolyte SB, and the same electrocurtain-type electron Using an X-ray irradiation device (output: 200 kV; irradiation dose: 2 Mrad), the acrylate oligomer to be applied is polymerized,
On the negative electrode, a layer composed of a polymer solid electrolyte SA also serving as a separator was formed. The thickness of this layer was about 50 μm.
【００１９】〔リチウム二次電池の作製〕高分子固体電
解質ＳＡからなる層に正極の活物質層を重ね合わせて電
極体を作製し、これを使用して、扁平形のリチウム二次
電池Ａ〜Ｍを作製した。各電池の負極に含有させた高分
子固体電解質ＳＢのヤング弾性率を表１に示す。ヤング
弾性率は、引張圧縮試験機を使用して、ＪＩＳ Ｋ６３
０１（試験速度：２００ｍｍ／分；試験温度：２５°
Ｃ）に準拠して、荷重−伸長率曲線より求めた値であ
る。なお、試験片の幅及び厚みはマイクロメーターを使
用して測定した。[Preparation of Lithium Secondary Battery] An electrode body is prepared by superposing a positive electrode active material layer on a layer composed of a polymer solid electrolyte SA, and this is used to form flat lithium secondary batteries A to M was produced. Table 1 shows the Young's modulus of the solid polymer electrolyte SB contained in the negative electrode of each battery. The Young's modulus was measured using a tensile compression tester according to JIS K63.
01 (test speed: 200 mm / min; test temperature: 25 °)
This is a value obtained from a load-elongation rate curve according to C). The width and thickness of the test piece were measured using a micrometer.
【００２０】[0020]
【表１】 [Table 1]
【００２１】図１は、作製したリチウム二次電池の断面
模式図であり、図示の電池ＢＡは、正極１、高分子固体
電解質ＳＢを含有する負極２、負極２と一体形成された
高分子固体電解質ＳＡからなる層３、正極缶４、負極缶
５、正極集電体６、負極集電体７及びポリプロピレン製
の絶縁パッキング８などからなる。FIG. 1 is a schematic cross-sectional view of a manufactured lithium secondary battery. The illustrated battery BA includes a positive electrode 1, a negative electrode 2 containing a polymer solid electrolyte SB, and a polymer solid body integrally formed with the negative electrode 2. It comprises a layer 3, made of an electrolyte SA, a positive electrode can 4, a negative electrode can 5, a positive electrode current collector 6, a negative electrode current collector 7, an insulating packing 8 made of polypropylene, and the like.
【００２２】正極１及び負極２は、高分子固体電解質Ｓ
Ａからなる層３を介して対向して正極缶４及び負極缶５
が形成する電池ケース内に収納されており、正極１は正
極集電体６を介して正極缶４に、又負極２は負極集電体
７を介して負極缶５に接続され、電池内部に生じた化学
エネルギーを正極缶４及び負極缶５の両端子から電気エ
ネルギーとして外部へ取り出し得るようになっている。The positive electrode 1 and the negative electrode 2 are made of a solid polymer electrolyte S
A positive electrode can 4 and a negative electrode can 5
The positive electrode 1 is connected to the positive electrode can 4 via the positive electrode current collector 6, and the negative electrode 2 is connected to the negative electrode can 5 via the negative electrode current collector 7. The generated chemical energy can be taken out from both terminals of the positive electrode can 4 and the negative electrode can 5 as electric energy.
【００２３】〈各電池の１サイクル目及び２００サイク
ル目の放電容量〉各電池を、２５°Ｃにて、電流密度１
００μＡ／ｃｍ2 で４．２Ｖまで充電した後、電流密度
１００μＡ／ｃｍ2 で２．７５Ｖまで放電して、各電池
の１サイクル目及び２００サイクル目の正極１ｃｍ2 当
たりの放電容量（ｍＡｈ／ｃｍ2）を求めた。結果を先
の表１に示す。<Discharge capacity at the first cycle and 200th cycle of each battery> Each battery was subjected to a current density of 1 at 25 ° C.
After charging at 00μA / cm 2 to 4.2 V, a current density of 100 .mu.A / cm 2 and discharged to 2.75V at a discharge capacity of the positive electrode 1 cm 2 per 1 cycle and 200th cycle of each battery (mAh / cm 2 ) Asked. The results are shown in Table 1 above.
【００２４】表１に示すように、負極が含有する高分子
固体電解質ＳＢのヤング弾性率が０．１×１０4 〜３．
５×１０4 ｋｇｆ／ｃｍ2 の場合に、２００サイクル目
の放電容量が大きい。この事実から、炭素をリチウムイ
オン吸蔵材とする負極にヤング弾性率が０．１×１０4
〜３．５×１０4 ｋｇｆ／ｃｍ2 の高分子固体電解質Ｓ
Ｂを含有せしめることにより、充放電サイクル特性に優
れたリチウム二次電池が得られることが分かる。As shown in Table 1, the Young's modulus of the solid polymer electrolyte SB contained in the negative electrode is 0.1 × 10 4 to 3 × 10 4 .
In the case of 5 × 10 4 kgf / cm 2 , the discharge capacity at the 200th cycle is large. From this fact, the Young's modulus of the negative electrode using carbon as the lithium ion storage material is 0.1 × 10 4
~ 3.5 × 10 4 kgf / cm 2 solid polymer electrolyte S
It can be seen that by adding B, a lithium secondary battery having excellent charge / discharge cycle characteristics can be obtained.
【００２５】[0025]
【発明の効果】本発明電池は、充放電サイクル特性に優
れる。The battery of the present invention has excellent charge / discharge cycle characteristics.
【図１】実施例で作製した扁平形のリチウム二次電池の
断面図である。FIG. 1 is a cross-sectional view of a flat lithium secondary battery manufactured in an example.
ＢＡ 扁平形のリチウム二次電池（高分子固体電解質電
池） １ 正極 ２ ヤング弾性率が０．１×１０4 〜３．５×１０4
ｋｇｆ／ｃｍ2の高分子固体電解質ＳＢを含有する負極 ３ セパレータを兼ねる高分子固体電解質ＳＡからな
る層BA Flat lithium secondary battery (polymer solid electrolyte battery) 1 Positive electrode 2 Young's modulus is 0.1 × 10 4 to 3.5 × 10 4
Negative electrode containing kgf / cm 2 of solid polymer electrolyte SB 3 Layer composed of solid polymer electrolyte SA also serving as separator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西尾 晃治 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Nishio 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.
Claims (2)
リチウムイオン吸蔵材とする負極とを備えるリチウム二
次電池において、前記負極が、ヤング弾性率０．１×１
０4〜３．５×１０4 ｋｇｆ／ｃｍ2 の高分子固体電解
質ＳＢを含有していることを特徴とするリチウム二次電
池。1. A lithium secondary battery comprising a positive electrode, a polymer solid electrolyte SA, and a negative electrode using carbon as a lithium ion storage material, wherein the negative electrode has a Young's modulus of 0.1 × 1.
0 4 ~3.5 × 10 4 lithium secondary battery, characterized by containing the solid polymer electrolyte SB of kgf / cm 2.
子固体電解質ＳＢのマトリクスを形成するオリゴマーに
電解質塩を溶かした溶液、又は、該オリゴマーと溶媒及
び電解質塩からなる電解液とを混合して得た溶液を、負
極内部に浸透せしめた後、浸透せるオリゴマーを重合し
て得られたものである請求項１記載のリチウム二次電
池。2. A polymer solid electrolyte SB is a solution in which an electrolyte salt is dissolved in an oligomer which forms a matrix of the polymer solid electrolyte SB by polymerization, or a mixture of the oligomer and an electrolyte solution comprising a solvent and an electrolyte salt. 2. The lithium secondary battery according to claim 1, wherein the solution is obtained by permeating the solution obtained in the negative electrode and then polymerizing the permeating oligomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8323475A JPH10149813A (en) | 1996-11-18 | 1996-11-18 | Lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8323475A JPH10149813A (en) | 1996-11-18 | 1996-11-18 | Lithium secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10149813A true JPH10149813A (en) | 1998-06-02 |
Family
ID=18155109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8323475A Pending JPH10149813A (en) | 1996-11-18 | 1996-11-18 | Lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10149813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027857A1 (en) * | 2000-09-29 | 2002-04-04 | Dai-Ichi Kogyo Seiyaku Co., Ltd. | Process for producing a lithium secondary battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07272757A (en) * | 1994-03-29 | 1995-10-20 | Yuasa Corp | Battery |
| JPH08167415A (en) * | 1994-12-14 | 1996-06-25 | Sanyo Electric Co Ltd | Thin type high polymer solid electrolyte battery and its manufacture |
| JPH08255610A (en) * | 1995-03-17 | 1996-10-01 | Canon Inc | Lithium secondary battery |
-
1996
- 1996-11-18 JP JP8323475A patent/JPH10149813A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07272757A (en) * | 1994-03-29 | 1995-10-20 | Yuasa Corp | Battery |
| JPH08167415A (en) * | 1994-12-14 | 1996-06-25 | Sanyo Electric Co Ltd | Thin type high polymer solid electrolyte battery and its manufacture |
| JPH08255610A (en) * | 1995-03-17 | 1996-10-01 | Canon Inc | Lithium secondary battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027857A1 (en) * | 2000-09-29 | 2002-04-04 | Dai-Ichi Kogyo Seiyaku Co., Ltd. | Process for producing a lithium secondary battery |
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