JPH0535575Y2 - - Google Patents
Info
- Publication number
- JPH0535575Y2 JPH0535575Y2 JP1985183578U JP18357885U JPH0535575Y2 JP H0535575 Y2 JPH0535575 Y2 JP H0535575Y2 JP 1985183578 U JP1985183578 U JP 1985183578U JP 18357885 U JP18357885 U JP 18357885U JP H0535575 Y2 JPH0535575 Y2 JP H0535575Y2
- Authority
- JP
- Japan
- Prior art keywords
- conductive film
- battery
- electrode
- thin battery
- thin
- 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.)
- Expired - Lifetime
Links
- 239000002904 solvent Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 claims 7
- 239000010409 thin film Substances 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000011231 conductive filler Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- XLLIQLLCWZCATF-UHFFFAOYSA-N ethylene glycol monomethyl ether acetate Natural products COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 description 1
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 description 1
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 description 1
- BJINVQNEBGOMCR-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethyl acetate Chemical compound COCCOCCOC(C)=O BJINVQNEBGOMCR-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- CRWNQZTZTZWPOF-UHFFFAOYSA-N 2-methyl-4-phenylpyridine Chemical compound C1=NC(C)=CC(C=2C=CC=CC=2)=C1 CRWNQZTZTZWPOF-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y02E60/12—
Description
〈産業上の利用分野〉
本考案は薄型電池用電極の改良に関するもので
ある。
〈従来技術〉
薄型電池用電極は、集電体上に電池活物質が載
置されることにより構成されるものである。従来
の集電体は、金属箔あるいは、金属箔に導電性フ
イルムをラミネートしたフイルムが用いられてあ
り、特に炭素フイラーを樹脂に混練してなる導電
性フイルムを用いた集電体は電気化学的に安定で
あり、さらに電池の耐漏液性向上からも有用であ
る。
〈本考案が解決しようとする問題点〉
しかし、従来用いられている該導電性フイルム
は、フイルムのピンホール・導電性フイラーと樹
脂の界面、あるいは導電性フイラーの分散性の悪
い部位から電池電解液がしみ出すおそれがあつ
た。
さらに、薄型電池用電極では、集電体と電池合
剤の間に圧力がかからないため、該集電体と電池
合剤の接着部が経時的に変化し、電池内部抵抗が
増大するなどの欠点を有していた。
〈問題を解決するための手段〉
本考案は、以上の現状に鑑みてなされたもので
あり、集電体をなす導電性フイルムを２層以上の
構造にすることにより、導電性フイルムからの電
解液のしみ出し封止性に優れた電池用電極を提供
するものであり、さらに言えば、二層以上の層構
成からなる導電性フイルムのうち、電池内側の導
電性フイルムが溶剤に可溶な導電性フイルムであ
り、該溶剤に不溶な導電性フイルムを電池外側に
配置するものである。また、ここで本発明でいう
溶剤とは電池合剤をスラリー化し載置後乾燥する
ためのものであり、具体的にはエチレングリコー
ルモノメチルエーテル、エチレングリコールモノ
メチルエーテルアセテート、エチレングリコール
モノエチルエーテル、エチレングリコールモノエ
チルエーテルアセテート、エチレングリコールモ
ノブチルエーテル、エチレングリコールモノブチ
ルエーテルアセテート、エチレングリコールジエ
チルエーテル、エチレングリコールジブチルエー
テル、エチレングリコールモノメチルエーテル、
ジエチレングリコールモノメチルエーテルアセテ
ート、ジエチレングリコールモノエチルエーテ
ル、ジエチレングリコールモノエチルエーテルア
セテート、ジエチレングリコールモノブチルエー
テル、ジエチレングリコールモノブチルエーテル
アセテート、ジエチレングリコールジエチルエー
テル、ジエチレングリコールジブチルエーテル等
が使用できる。
〈実施例 １〉
以下本考案を、実施例に基づき、図面を用いて
更に詳細に説明する。
第１図は本考案による薄型電池用電極の断面図
を示すものである。同図を参照すると、集電体１
０は20μm硬質アルミ箔と導電性フイルムのラミ
ネートによりなる、該導電性フイルムはポリオレ
フイン系樹脂としてポリエチレンを使用し、これ
に炭素フイラーを35重量％混練して作成した厚さ
30μmのフイルムを２枚ラミネートして作成され
たものである。ここで導電性フイルムに用いる樹
脂および導電性フイラーは、電池活物質および電
池電解液に安定な物質であればよい。特に該導電
性フイルムに用いる樹脂としてポリオレフイン系
樹脂を更に該導電性フイラーとして炭素フイラー
を用いることにより、電気化学的に極めて安定な
導電性フイルムを作成でき、さらにラミネートす
るだけの簡単な工程だけで２層以上の構造を有す
る導電性フイルムを作成できる。
次に前記の様に作成した薄型電池用電極Ａおよ
び導電性フイルムを一層しか用いない以外は同一
の従来の薄型電池用電極Ｂを用い薄型電池を作成
し、60℃40日保存後の電解液しみ出し等による不
良率の実験を行ない第１表に示す結果が得られ
た。
<Industrial Application Field> The present invention relates to improvement of electrodes for thin batteries. <Prior Art> A thin battery electrode is constructed by placing a battery active material on a current collector. Conventional current collectors use metal foil or a film in which a conductive film is laminated onto a metal foil. In particular, current collectors using a conductive film made by kneading carbon filler into resin are electrochemically sensitive. It is stable and is also useful for improving the leakage resistance of batteries. <Problems to be solved by the present invention> However, the conventionally used conductive film does not allow battery electrolysis to occur through pinholes in the film, the interface between the conductive filler and the resin, or areas where the conductive filler has poor dispersibility. There was a risk of liquid seeping out. Furthermore, with thin battery electrodes, no pressure is applied between the current collector and the battery mixture, so the bond between the current collector and the battery mixture changes over time, leading to disadvantages such as an increase in battery internal resistance. It had <Means for solving the problem> The present invention was made in view of the above-mentioned current situation, and by making the conductive film that forms the current collector have a structure of two or more layers, electrolysis from the conductive film can be reduced. The purpose is to provide battery electrodes with excellent liquid seepage sealing properties, and more specifically, among conductive films consisting of two or more layers, the conductive film on the inside of the battery is soluble in solvents. A conductive film that is insoluble in the solvent is placed on the outside of the battery. In addition, the solvent referred to in the present invention is one for slurrying the battery mixture and drying it after being placed, and specifically, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether, ethylene Glycol monoethyl ether acetate, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether acetate, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, ethylene glycol monomethyl ether,
Diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, etc. can be used. <Example 1> Hereinafter, the present invention will be described in more detail based on examples and with reference to the drawings. FIG. 1 shows a cross-sectional view of an electrode for a thin battery according to the present invention. Referring to the figure, current collector 1
0 is made of a laminate of 20μm hard aluminum foil and a conductive film.The conductive film is made by using polyethylene as a polyolefin resin and kneading 35% by weight of carbon filler into it.
It is made by laminating two 30μm films. The resin and conductive filler used in the conductive film may be any material as long as it is stable to the battery active material and battery electrolyte. In particular, by using a polyolefin resin as the resin used for the conductive film and a carbon filler as the conductive filler, it is possible to create an electrochemically extremely stable conductive film, and furthermore, it is possible to create a conductive film with a simple process of laminating. A conductive film having a structure of two or more layers can be created. Next, a thin battery was created using the thin battery electrode A created as described above and the conventional thin battery electrode B, which was the same except that only one layer of conductive film was used, and the electrolyte solution was stored at 60°C for 40 days. An experiment was conducted to determine the defective rate due to seepage, etc., and the results shown in Table 1 were obtained.
【表】
前記表より本実施例による薄型電池用電極を用
いることにより、不良率が極めて減少することと
なるが、これは導電性フイルムを２層構造にする
ことにより、導電性フイルムの不良発生部分が重
なり合う確率が極めて少なくなるためである。
〈実施例 ２〉
薄型電池用電極の集電体上を構成する第１図に
示す導電性フイルムＢは実施例１で用いたポリエ
チレンに炭素フイラーを35％混練したものを用い
さらに該導電性フイルムＢの上に、アルキツド系
樹脂に炭素フイラーを35重量％混練した厚さ約
10μの導電性フイルムＡを載置して薄型電池用電
極の集電体を構成したものである。
前記構成の集電体上にジエチレングリコール・
ジエチルエーテル溶剤（H5C2OC2H4OC2H4OC2
H5）に電池合剤をスリラー化し載置後乾燥し、
薄型電池用電極を作成した。
ここで電池合剤を載置すると導電性フイルムＡ
は該溶剤に溶解するため電池合剤と集電体との接
着剤として作用し、接着性の優れたかつ経時変化
の少ない薄型電池用電極が作成される。さらに導
電性フイルムＢの不良部分は導電性フイルムＡを
載置することにより覆われる可能性が大であり、
電解液のしみ出しによる不良が極めて少ない薄型
電池用電極を作成できるものとなる。
前記の様に作成した薄型電池用電極Ｃと、実施
例１で用いた従来の薄型電池用電極Ｂを用い、薄
型電池を作成し、60℃40日保存後の電解液のしみ
出しによる電池不良の発生率ならびに内部抵抗変
化の実験を行ない、第２表に示す結果を得た。[Table] As can be seen from the above table, by using the electrode for a thin battery according to this embodiment, the defective rate is significantly reduced, and this is because the conductive film is made into a two-layer structure, which greatly reduces the probability of defective parts of the conductive film overlapping. <Example 2> The conductive film B shown in Fig. 1 which constitutes the collector of the electrode for a thin battery is made of the polyethylene used in Example 1 mixed with 35% carbon filler, and on top of the conductive film B, a layer of about 1000 mm thick made of alkyd resin mixed with 35% carbon filler by weight is applied.
A 10μ conductive film A was placed on the collector to form a current collector for a thin battery electrode.
Diethyl ether solvent ( H5C2OC2H4OC2H4OC2
H 5 ) and dry the battery mixture.
A thin battery electrode was prepared. When the battery mixture was placed on the conductive film A,
Since the conductive film B dissolves in the solvent, it acts as an adhesive between the battery mixture and the current collector, and a thin battery electrode having excellent adhesion and little change over time is produced. Furthermore, there is a high possibility that defective parts of the conductive film B will be covered by placing the conductive film A thereon.
It is possible to prepare an electrode for a thin battery with very few defects due to electrolyte seepage. Using the electrode C for a thin battery prepared as described above and the conventional electrode B for a thin battery used in Example 1, a thin battery was prepared, and an experiment was carried out on the rate of battery defects due to electrolyte seepage and the change in internal resistance after storage at 60°C for 40 days, and the results are shown in Table 2.
【表】
前記第２表より本実施例による薄型電池用電極
を用いることにより、不良率が極めて少なく、か
つ内部抵抗の経時劣化も少ない薄型電池用電極が
得られる。
〈考案の効果〉
本考案は、上記の如くであり、導電性フイルム
が二層以上の構造を有した薄型電池用電極を用い
ることにより、導電性フイルムからの電解液のし
み出し封止性にすぐれたものとなる。さらに溶剤
に可溶な導電性フイルムと、溶剤に不溶な導電性
フイルムの組合わせ構成にすることで、集電体と
電池合剤との接着性が強固で不良率の少ない、ま
た内部抵抗の維持性にすぐれたものとなる。[Table] From Table 2 above, by using the thin battery electrode according to this example, a thin battery electrode with extremely low defect rate and little deterioration of internal resistance over time can be obtained. <Effects of the invention> The present invention is as described above, and by using a thin battery electrode in which the conductive film has a structure of two or more layers, the sealing property of the electrolyte seeping out from the conductive film is improved. It will be excellent. Furthermore, by combining a conductive film that is soluble in a solvent and a conductive film that is insoluble in a solvent, the adhesiveness between the current collector and the battery mixture is strong, the defect rate is low, and the internal resistance is low. It has excellent maintainability.
第１図は、本考案による薄型電池用電極の断面
図を示す説明図である。
２……電池合剤、４……導電性フイルムＡ、６
……導電性フイルムＢ、８……アルミ箔、１０…
…集電体、１２……電極。
FIG. 1 is an explanatory diagram showing a cross-sectional view of an electrode for a thin battery according to the present invention. 2... Battery mixture, 4... Conductive film A, 6
...Conductive film B, 8...Aluminum foil, 10...
...Current collector, 12... Electrode.
Claims (1)
ムよりなるフイルムを集電体に用いた薄膜電池用
電極において、該導電性フイルムが二層以上の層
構成よりなり、かつ電池内側の導電性フイルムが
電池合剤の溶剤に可溶な導電性フイルムであり、
該溶剤に不溶な導電性フイルムが電池外側にある
ことを特徴とする薄膜電池用電極。 In a thin film battery electrode using a conductive film or a film made of a metal foil and a conductive film as a current collector, the conductive film has a layer structure of two or more layers, and the conductive film inside the battery is It is a conductive film that is soluble in the solvent of the agent.
A thin film battery electrode characterized in that a conductive film insoluble in the solvent is provided on the outside of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985183578U JPH0535575Y2 (en) | 1985-11-28 | 1985-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985183578U JPH0535575Y2 (en) | 1985-11-28 | 1985-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6291356U JPS6291356U (en) | 1987-06-11 |
| JPH0535575Y2 true JPH0535575Y2 (en) | 1993-09-09 |
Family
ID=31130448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985183578U Expired - Lifetime JPH0535575Y2 (en) | 1985-11-28 | 1985-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535575Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4403524B2 (en) * | 2008-01-11 | 2010-01-27 | トヨタ自動車株式会社 | Electrode and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417032B2 (en) * | 1974-01-23 | 1979-06-27 | ||
| JPS56109462A (en) * | 1980-02-01 | 1981-08-29 | Asahi Chem Ind Co Ltd | Manufacture of film-shaped electrode |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417032U (en) * | 1977-07-08 | 1979-02-03 |
-
1985
- 1985-11-28 JP JP1985183578U patent/JPH0535575Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417032B2 (en) * | 1974-01-23 | 1979-06-27 | ||
| JPS56109462A (en) * | 1980-02-01 | 1981-08-29 | Asahi Chem Ind Co Ltd | Manufacture of film-shaped electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6291356U (en) | 1987-06-11 |
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