JPH08321325A - Lithium ion battery - Google Patents
Lithium ion batteryInfo
- Publication number
- JPH08321325A JPH08321325A JP7149578A JP14957895A JPH08321325A JP H08321325 A JPH08321325 A JP H08321325A JP 7149578 A JP7149578 A JP 7149578A JP 14957895 A JP14957895 A JP 14957895A JP H08321325 A JPH08321325 A JP H08321325A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- ion battery
- binder
- porous
- synthetic resin
- 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.)
- Granted
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
Landscapes
- Cell Electrode Carriers And Collectors (AREA)
- 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、リチウムイオン電池に
関するものである。FIELD OF THE INVENTION The present invention relates to a lithium ion battery.
【０００２】[0002]
【従来の技術】リチウムイオン電池は、正極板と負極板
とをセパレーターを介して積層もしくは卷回してなる発
電要素をそなえている。かかる電池は、特開平４−１９
２２５７号や特開平４−２０６２７５号等により公知で
ある。2. Description of the Related Art A lithium-ion battery has a power generating element which is formed by laminating or winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween. Such a battery is disclosed in JP-A-4-19.
It is known from 2257 and JP-A-4-206275.
【０００３】[0003]
【発明が解決しようとする課題】ところが、かかる従来
のリチウムイオン電池は、この３層からなる発電要素を
単に積層または卷回しているのみで、各層が一体に保
持、接続されているのではないので、電池組立中に層間
のズレなどがおこり易く、量産上の課題となっていた。However, in such a conventional lithium-ion battery, the power generation element composed of these three layers is simply laminated or wound, and each layer is not integrally held and connected. Therefore, a gap between layers is likely to occur during battery assembly, which is a problem in mass production.
【０００４】本発明はこのような課題を解決するために
なされたものであり、その目的とすれうところは、発電
要素のハンドリングが容易で生産性にすぐれたリチウム
イオン電池を提供することである。The present invention has been made to solve the above problems, and it is an object of the present invention to provide a lithium ion battery in which the power generation element can be easily handled and which has excellent productivity. .
【０００５】[0005]
【課題を解決するための手段】そこで、金属薄膜からな
る第一層、その上に形成されたリチウムを吸蔵放出する
金属化合物からなる多孔性活物質層である第二層、さら
にその上に電解質を保持する合成樹脂もしくは無機物質
からなる多孔性電解質保持層ある第三層、さらにその上
にリチウムイオンを吸蔵放出するような金属化合物もし
くは炭素材料からなる第四層、さらにその上に金属薄膜
からなる第五層を積層してなるリチウムイオン電池の発
電要素において、この発電要素のすべての各層間もしく
は第一層から第三層までの各層間が合成樹脂からなるバ
インダーによって接合されていることを特徴とするリチ
ウムイオン電池の発明により、上記課題を解決するもの
である。Therefore, a first layer made of a metal thin film, a second layer made of a metal compound which absorbs and releases lithium and is a porous active material layer formed thereon, and an electrolyte formed thereon. A third layer, which is a porous electrolyte holding layer made of a synthetic resin or an inorganic substance that retains, a fourth layer made of a metal compound or a carbon material that absorbs and releases lithium ions, and a thin metal film formed thereon. In a power generation element for a lithium-ion battery that is formed by laminating a fifth layer, the layers of all of the power generation elements or the layers from the first layer to the third layer are joined by a binder made of a synthetic resin. The invention of a featured lithium-ion battery solves the above problems.
【０００６】[0006]
【作用】本発明のリチウムイオン電池は、発電要素を構
成する各機能材料からなる層のの層間が合成樹脂製バイ
ンダーによって接合されているので、組立時の層間のズ
レが少なく生産性が改善されるものである。なお各層間
をつなぐバインダーは、必要とされるイオンや電子の透
過を阻害しないように量や分布を考慮する必要がある。In the lithium-ion battery of the present invention, the layers of the layers comprising the functional materials constituting the power generation element are joined by the synthetic resin binder, so that there is little gap between the layers during assembly and the productivity is improved. It is something. It is necessary to consider the amount and distribution of the binder that connects the layers so as not to impede the required transmission of ions and electrons.
【０００７】[0007]
【実施例】以下に、好適な実施例により本発明を説明す
る（図１参照）。なお、本発明の電池は、円筒型や角形
であっても良いが、下記では薄型リチウムイオン電池に
適用した場合について説明する。The present invention will be described below with reference to preferred embodiments (see FIG. 1). The battery of the present invention may be cylindrical or prismatic, but in the following, the case of application to a thin lithium ion battery will be described.
【０００８】まず、５０μｍのアルミニウム薄膜１に、
正極活物質のＬｉＭｎ2 Ｏ4 粉末と導電助材のアセチレ
ンブラック粉末と合成樹脂バインダーおよび溶剤との混
合物を、乾燥後の直径が１６ｍｍで厚さが２５μｍで多
孔度が３５％であるような多孔性正極活物質層２を塗
布、形成する（実容量１．６ｍＡｈ）。First, on the aluminum thin film 1 of 50 μm,
A mixture of a positive electrode active material, LiMn 2 O 4 powder, a conductive auxiliary material, acetylene black powder, a synthetic resin binder, and a solvent, is dried to have a diameter of 16 mm, a thickness of 25 μm, and a porosity of 35%. A positive electrode active material layer 2 is applied and formed (actual capacity: 1.6 mAh).
【０００９】さらに、その上にＭｇＯ粉末と合成樹脂バ
インダーと溶剤との混合物を、乾燥後の直径が同じく１
６ｍｍで厚さが２０μｍで空孔率が３０％であるような
多孔性電解質保持層３を塗布、形成して、二層塗工体と
する。Further, a mixture of MgO powder, a synthetic resin binder and a solvent was further added thereto, and the diameter after drying was the same.
A porous electrolyte holding layer 3 having a thickness of 6 mm, a thickness of 20 μm, and a porosity of 30% is applied and formed to form a two-layer coated body.
【００１０】さらに、前記の５０μｍのアルミニウム箔
上に、前記の径１６ｍｍの二層塗工体と同心円状に、か
つ二層塗工体と０．１ｍｍのクリアランスを持つよう
に、径１８ｍｍで厚さが乾燥後の二層塗工体と同じ厚さ
になるように、電離放射線硬化型樹脂からなるバインダ
ー層４を塗布、形成する。Further, on the aluminum foil of 50 μm, a diameter of 18 mm is formed concentrically with the two-layer coated body having a diameter of 16 mm and a clearance of 0.1 mm with the two-layer coated body. The binder layer 4 made of an ionizing radiation curable resin is applied and formed so that the thickness becomes the same as that of the two-layer coated body after drying.
【００１１】以上の塗工作業は、各塗工後に乾燥工程を
設けても良いし、一部もしくは全ての塗工をいわゆるウ
エット・オン・ウエットで塗工した後、乾燥工程を通過
させても良い。いずれにせよ５０μｍアルミニウム箔と
正極活物質層と電解質保持層との間は、各塗工体が含有
するバインダーによって密着接続されているものとす
る。また、電離放射線硬化型樹脂からなる同心円状のバ
インダー層は、５０μｍアルミニウム箔と一定の強度で
接合しているものとする。In the above coating operation, a drying step may be provided after each coating, or a part or all of the coating may be applied by so-called wet-on-wet and then the drying step may be passed. good. In any case, it is assumed that the 50 μm aluminum foil, the positive electrode active material layer, and the electrolyte holding layer are closely connected by the binder contained in each coated body. Further, the concentric binder layer made of an ionizing radiation curable resin is bonded to a 50 μm aluminum foil with a certain strength.
【００１２】このような塗工物を真空乾燥して溶剤、水
分などを除去したのち、露点−４００℃以下の乾燥雰囲
気において、１Ｍ・ＬｉＰＦ6 ／プロピレンカーボネー
ト＋ジメチルカーボネート（１：１）有機電解液を前記
二層塗工体に注液する。このとき、電解液が二層塗工体
よりあふれてバインダー層などを汚さないように注意す
る必要がある。すなわち、二層塗工体の補液能力を越え
ない範囲の注液量とする。[0012] Such a coating product is vacuum dried to remove the solvent, water and the like, and then, in a dry atmosphere having a dew point of -400 ° C or lower, 1M LiPF 6 / propylene carbonate + dimethyl carbonate (1: 1) organic electrolysis. The liquid is poured into the two-layer coated body. At this time, it is necessary to take care so that the electrolytic solution does not overflow from the two-layer coated body and stain the binder layer and the like. That is, the amount of liquid to be injected is within a range that does not exceed the liquid replacement capacity of the two-layer coated body.
【００１３】つぎに、二層塗工体の上に径１６ｍｍで厚
さが２０μｍのアルミニウム箔５を設置し、さらに径１
８ｍｍで厚さが３５μｍのステンレス箔６を設置する。
この２０μｍアルミニウム箔と３５μｍステンレス箔と
の間の電子伝導性を改善するために、この間に導電性塗
料からなる導電接着層７を介在させても良い。Next, an aluminum foil 5 having a diameter of 16 mm and a thickness of 20 μm was placed on the two-layer coated body, and further, a diameter of 1
A stainless foil 6 having a thickness of 8 mm and a thickness of 35 μm is installed.
In order to improve the electronic conductivity between the 20 μm aluminum foil and the 35 μm stainless steel foil, a conductive adhesive layer 7 made of a conductive paint may be interposed therebetween.
【００１４】この後、該積層物に電離放射線を照射し、
前記の電離放射線硬化型樹脂バインダー層４を反応硬化
させて５０μｍのアルミニウム箔１と３５μｍのステン
レス箔６とを密着接合し、多孔性正極活物質層と多孔性
電解質保持層と２０μｍアルミニウム箔とからなる電池
発電要素を気密封口する。Thereafter, the laminate is irradiated with ionizing radiation,
The ionizing radiation-curable resin binder layer 4 is reaction-cured to bring the aluminum foil 1 having a thickness of 50 μm and the stainless steel foil 6 having a thickness of 35 μm into close contact with each other. Airtightly seal the battery power generating element.
【００１５】この結果、該電池発電要素は、外部環境か
ら気密保護されるものである。そして、該積層体を５０
μｍアルミニウム箔から打ち抜いて、正極活物質層を正
極側とし、２５μｍアルミニウム箔を負極側として、
０．２ｍＡで４．０Ｖまで充電する。この結果、厚さが
１５０μｍで平均作動電圧が３．５Ｖ、公称容量が１．
２ｍＡｈの薄型リチウムイオン電池を得るものである。As a result, the battery power generating element is hermetically protected from the external environment. Then, the laminated body is 50
Punching from a μm aluminum foil, the positive electrode active material layer on the positive electrode side, the 25 μm aluminum foil on the negative electrode side,
Charge to 4.0V at 0.2mA. As a result, the thickness is 150 μm, the average operating voltage is 3.5 V, and the nominal capacity is 1.
A thin lithium-ion battery of 2 mAh is obtained.
【００１６】上記の薄型リチウムイオン電池は、各塗工
体がバインダーにより密着接続されているので、生産時
のハンドリングが優れており、非常に生産性が高い。The above-mentioned thin lithium-ion battery is excellent in handling at the time of production since each coating is closely connected by the binder, and the productivity is very high.
【００１７】[0017]
【発明の効果】上述のように、本発明のリチウムイオン
電池は、金属薄膜からなる第一層、その上に形成された
リチウムを吸蔵放出する金属化合物からなる多孔性活物
質層である第二層、さらにその上に電解質を保持する合
成樹脂もしくは無機物質からなる多孔性電解質保持層あ
る第三層、さらにその上にリチウムイオンを吸蔵放出す
るような金属化合物もしくは炭素材料からなる第四層、
さらにその上に金属薄膜からなる第五層を積層してなる
リチウムイオン電池の発電要素において、この発電要素
のすべての各層間もしくは第一層から第三層までの各層
間が合成樹脂からなるバインダーによって接合されてい
ることを特徴とするものであり、これによりすぐれた生
産性を有しており、特にハンドリングが難しい薄型電池
の製造等において有用であり、その工業的価値が極めて
大きい。As described above, the lithium ion battery of the present invention comprises the first layer composed of the metal thin film, and the second layer formed on the first layer composed of the metal compound which absorbs and releases lithium. Layer, a third layer which is a porous electrolyte holding layer made of a synthetic resin or an inorganic substance holding an electrolyte thereon, and a fourth layer made of a metal compound or a carbon material which absorbs and releases lithium ions thereon.
Further, in a power generation element for a lithium-ion battery in which a fifth layer made of a metal thin film is further laminated thereon, a binder made of synthetic resin between all layers of the power generation element or layers from the first layer to the third layer. It is characterized in that it is bonded by means of, and it has excellent productivity, and is particularly useful in the production of thin batteries that are difficult to handle, and its industrial value is extremely large.
【図１】本発明の１実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
１ ５０μｍのアルミニウム薄膜 ２ 多孔性正極活物質層 ３ 多孔性電解質保持層 ４ バインダー層 ５ ２０μｍのアルミニウム薄 ６ ３５μｍのステンレス箔 ７ 導電性接着層 1 Aluminum thin film of 50 μm 2 Porous positive electrode active material layer 3 Porous electrolyte holding layer 4 Binder layer 5 Thin aluminum of 20 μm 6 Stainless steel foil of 35 μm 7 Conductive adhesive layer
Claims (1)
たリチウムを吸蔵放出する金属化合物からなる多孔性活
物質層である第二層、さらにその上に電解質を保持する
合成樹脂もしくは無機物質からなる多孔性電解液保持層
である第三層、さらにその上にリチウムイオンを吸蔵放
出する金属化合物もしくは炭素材料からなる第四層、さ
らにその上に金属薄膜からなる第五層を積層してなるリ
チウムイオン電池の発電要素において、この発電要素の
すべての各層間もしくは第一層から第三層までの各層間
が合成樹脂からなるバインダーによって接合されている
ことを特徴とするリチウムイオン電池。1. A first layer formed of a thin film, a second layer formed on the first layer which is a porous active material layer formed of a metal compound that absorbs and releases lithium, and a synthetic resin or an inorganic material holding an electrolyte thereon. A third layer that is a porous electrolyte holding layer made of a substance, a fourth layer that is made of a metal compound or a carbon material that occludes and releases lithium ions, and a fifth layer that is made of a metal thin film are laminated on the third layer. A lithium-ion battery, wherein all the layers of the power-generating element or the layers from the first layer to the third layer are joined by a binder made of a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14957895A JP3743773B2 (en) | 1995-05-24 | 1995-05-24 | Lithium ion battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14957895A JP3743773B2 (en) | 1995-05-24 | 1995-05-24 | Lithium ion battery and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08321325A true JPH08321325A (en) | 1996-12-03 |
| JP3743773B2 JP3743773B2 (en) | 2006-02-08 |
Family
ID=15478267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14957895A Expired - Lifetime JP3743773B2 (en) | 1995-05-24 | 1995-05-24 | Lithium ion battery and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3743773B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10275633A (en) * | 1997-01-28 | 1998-10-13 | Mitsubishi Electric Corp | Lithium ion secondary battery |
| WO2012131972A1 (en) * | 2011-03-31 | 2012-10-04 | 株式会社日立製作所 | Nonaqueous electrolyte battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6431354A (en) * | 1987-07-27 | 1989-02-01 | Sharp Kk | Laminated cell |
| JPH02143769U (en) * | 1989-05-08 | 1990-12-06 | ||
| JPH056775A (en) * | 1991-06-21 | 1993-01-14 | Matsushita Electric Ind Co Ltd | Manufacture of solid secondary battery |
| JPH0652866A (en) * | 1992-07-28 | 1994-02-25 | Yuasa Corp | Thin battery and manufacture thereof |
| JPH06243896A (en) * | 1992-12-25 | 1994-09-02 | Tdk Corp | Lithium secondary battery |
-
1995
- 1995-05-24 JP JP14957895A patent/JP3743773B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6431354A (en) * | 1987-07-27 | 1989-02-01 | Sharp Kk | Laminated cell |
| JPH02143769U (en) * | 1989-05-08 | 1990-12-06 | ||
| JPH056775A (en) * | 1991-06-21 | 1993-01-14 | Matsushita Electric Ind Co Ltd | Manufacture of solid secondary battery |
| JPH0652866A (en) * | 1992-07-28 | 1994-02-25 | Yuasa Corp | Thin battery and manufacture thereof |
| JPH06243896A (en) * | 1992-12-25 | 1994-09-02 | Tdk Corp | Lithium secondary battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10275633A (en) * | 1997-01-28 | 1998-10-13 | Mitsubishi Electric Corp | Lithium ion secondary battery |
| WO2012131972A1 (en) * | 2011-03-31 | 2012-10-04 | 株式会社日立製作所 | Nonaqueous electrolyte battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3743773B2 (en) | 2006-02-08 |
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