JPH04121948A - Separater for alkaline battery and its manufacture - Google Patents
Separater for alkaline battery and its manufactureInfo
- Publication number
- JPH04121948A JPH04121948A JP2242101A JP24210190A JPH04121948A JP H04121948 A JPH04121948 A JP H04121948A JP 2242101 A JP2242101 A JP 2242101A JP 24210190 A JP24210190 A JP 24210190A JP H04121948 A JPH04121948 A JP H04121948A
- Authority
- JP
- Japan
- Prior art keywords
- sulfuric acid
- solution
- polyvinyl alcohol
- nickel
- separater
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 20
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 20
- 229920000098 polyolefin Polymers 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 17
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 8
- -1 polypropylene Polymers 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004744 fabric Substances 0.000 abstract description 9
- 238000003860 storage Methods 0.000 abstract description 8
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 229910018007 MmNi Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 2
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- 239000013543 active substance Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 235000011118 potassium hydroxide Nutrition 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011149 active material Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229920000298 Cellophane Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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 Separators (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はアルカリ電池用セパレータとその製造法に関し
特にニッケルーカドミウム電池 ニッケルー水素電池
などのアルカリ電池に用いる発煙硫酸または濃硫酸で処
理したポリプロピレン製不織布を用いたセパレータに関
すａ
従来の技術
各種の電源として使われる蓄電池として鉛電池とアルカ
リ電池があム このうちアルカリ電池は高信頼性が期待
でき、小形軽量化も可能などの理由で小形電池は各種ポ
ータプル機器月番へ 大形は産業用として広く使われ
てきた
このアルカリ蓄電池において、負極の活物質としてはカ
ドミウムのは力＼ 亜鰍 鉄、水素などが対象となって
いる。正極としては一部空気極や酸化銀極なども取り上
げられているがほとんどの場合ニッケル極であ４ ポケ
ット式から焼結式に代わって特性が向上し さらに密閉
化が可能になるとともに用途も広かっね 焼結式の他に
高容量の発泡式それにフェルト式などが取り上げられ実
用化されていも
セパレータとして（よ おもにポリアミドの繊維布 不
織布 さらにこれらとセロファンやポリビニルアルコー
ルフィルムなどとの併用が採用されてき九 最近とくに
耐アルカリ性や耐酸化性の点でポリオレフィン製の繊維
布や不織布が一部用いられてきた なお密閉形ではガス
の透過が必要なのでフィルム状セパレータは好ましくな
く、また電解液の含浸性の点で好ましい不織布が一般的
であも
発明が解決しようとする課題
セパレータとして（よ 電気抵抗が低く、耐アルカリ性
や耐酸化性に優れ さらに電解液の含浸性がよいことな
どが要望され それに密閉形ではガスの透過が必要であ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a separator for alkaline batteries and a method for producing the same, and particularly to a separator made of polypropylene treated with oleum or concentrated sulfuric acid for use in alkaline batteries such as nickel-cadmium batteries and nickel-hydrogen batteries. Concerning the separator used a. Conventional technology Lead batteries and alkaline batteries are used as storage batteries for various power sources.Of these, alkaline batteries can be expected to have high reliability, and small batteries are used for various reasons such as being able to be made smaller and lighter. Portable Equipment Month Number In large-sized alkaline storage batteries that have been widely used for industrial purposes, the active materials for the negative electrode include cadmium, iron, and hydrogen. Although some air electrodes and silver oxide electrodes have been used as positive electrodes, in most cases nickel electrodes are used.4 The pocket type has been replaced by the sintered type, which has improved characteristics, enables sealing, and has a wider range of uses. In addition to the sintered type, high-capacity foamed type and felt type have been introduced and put into practical use as separators (mainly polyamide fiber cloth, nonwoven fabric, and combinations of these with cellophane, polyvinyl alcohol films, etc.). 9. Recently, polyolefin fiber cloth and non-woven fabric have been used in some cases, especially in terms of alkali resistance and oxidation resistance.Film separators are not preferable in closed types because they require gas permeation, and they are also impregnable with electrolyte. Although non-woven fabrics are generally preferred in this respect, the problems that the invention seeks to solve as separators (such as low electrical resistance, excellent alkali resistance and oxidation resistance, and good impregnability with electrolyte) are also required. In this case, gas permeation is necessary.
そこでこれらの条件を満たすものとしてポリアミドの繊
維布 不織布さらにこれらとセロファンやポリビニルア
ルコールフィルムなどとの併用が採用されてきた しか
し耐アルカリ性や耐酸化性の点で問題があるところから
ポリオレフィン製の繊維布や不織布が一部用いられてき
た しかしポリオレフィン製の繊維布や不織布は電解液
の含浸性の点で不十分であり、これを発煙硫酸や濃硫酸
で処理することで親電解液性を向上させる方式が提案さ
れ九
ところが親電解液性を向上させるためにこれら発煙硫酸
や濃硫酸で極端な処理を行なうと、ポリオレフィン製の
繊維布や不織布でも変質し強度の低下が生じるという問
題がでてきた 本発明はこのような問題を解決するもの
で、活物質の利用率の良好な長寿命のセパレータとその
製造法を提供することを目的とする。Therefore, polyamide fiber fabrics, non-woven fabrics, and combinations of these with cellophane, polyvinyl alcohol films, etc., have been adopted as materials that meet these conditions. However, due to problems with alkali resistance and oxidation resistance, polyolefin fiber fabrics have been adopted. However, polyolefin fiber fabrics and nonwoven fabrics are insufficient in their ability to be impregnated with electrolyte, so treating them with fuming sulfuric acid or concentrated sulfuric acid improves electrolyte affinity. Nine methods have been proposed, but when extreme treatments are carried out using fuming sulfuric acid or concentrated sulfuric acid to improve electrolyte properties, problems have arisen in that even polyolefin fiber cloth and non-woven fabric change in quality and deteriorate in strength. The present invention solves these problems, and aims to provide a long-life separator with good active material utilization and a method for manufacturing the separator.
課題を解決するための手段
この課題を解決するため本発明のアルカリ電池用セパレ
ータとその製造法（友 まず発煙硫酸または濃硫酸で、
強度の極端な低下がない程度でポリオレフィン製多孔体
を処理し その後これをポリビニルアルコールと硫酸を
含む溶液に含浸し これを加熱するものであム これに
より硫酸処理したポリビニルアルコールで被覆す４ こ
の場合電解液を十分用いた電池で（よ この硫酸処理し
たポリビニルアルコールによってフィルムが形成されて
もよい力（密閉形でいわゆるノイマン方式ではガスの透
過が必要であるので、硫酸処理したポリビニルアルコー
ルで被覆した後も多孔体である必要があるので、ポリビ
ニルアルコールと硫酸を含む溶液を含浸した後、余分な
溶液は除去することが必要であも
なおポリオレフィン製多孔体としては ポリエチレンや
ポリプロピレン製が一般的であり耐熱性も考虜にいれ
価格も考えるとポリプロピレン不織布がよ１．′Ｉ。Means for Solving the Problem In order to solve this problem, the separator for alkaline batteries of the present invention and its manufacturing method (companion).
A porous polyolefin material is treated to the extent that its strength does not deteriorate significantly, and then it is impregnated with a solution containing polyvinyl alcohol and sulfuric acid, which is then heated.This process coats the material with sulfuric acid-treated polyvinyl alcohol4. In a battery that uses enough electrolyte, it is possible to form a film with polyvinyl alcohol treated with sulfuric acid. Since the material still needs to be porous, it is necessary to remove the excess solution after impregnating it with a solution containing polyvinyl alcohol and sulfuric acid.However, polyolefin porous materials are generally made of polyethylene or polypropylene. Also, be captivated by its heat resistance.
Considering the price, polypropylene nonwoven fabric is better.1. 'I.
作用
本発明のアルカリ電池用セパレータとその製造法（よ
まず発煙硫酸または濃硫酸で強度の極端な低下がない程
度で、ポリオレフィン製多孔体を処理して親電解液性を
向上させることとなも これは ポリオレフィンのなか
にスルホン基が形成することによると思われも その後
これにポリビニルアルコールと硫酸を含む溶液を含浸し
これを加熱することで硫酸処理したポリビニルアルコー
ルが形成すも ポリビニルアルコールにもスルホン基が
形成すると思われる力（この場合の硫酸は低濃度でよい
のでこの処理でポリオレフィンが強度低下することはま
ったくな（兎 ポリオレフィンの強度低下がない程度で
の発煙硫酸または濃硫酸処理 ポリビニルアルコールの
硫酸処理いずれも単独では十分な親電群成を持たせるこ
とはできない力（画処理の併用でこれが可能になる。Function The separator for alkaline batteries of the present invention and its manufacturing method (like
First, the polyolefin porous material is treated with fuming sulfuric acid or concentrated sulfuric acid to an extent that does not significantly reduce its strength.This is due to the formation of sulfone groups in the polyolefin. Although it may seem that polyvinyl alcohol treated with sulfuric acid is formed by impregnating it with a solution containing polyvinyl alcohol and sulfuric acid and heating it, it seems that sulfonic groups are formed in polyvinyl alcohol as well (in this case, sulfuric acid has a low This treatment does not reduce the strength of the polyolefin at all because the concentration is sufficient (Usagi) Treatment with fuming sulfuric acid or concentrated sulfuric acid without decreasing the strength of the polyolefin Treatment of polyvinyl alcohol with sulfuric acid has sufficient electrophilic grouping when used alone. (This is possible with the combination of image processing.
実施例
以下本発明の一実施例のアルカリ電池用のセパレータと
その製造法について説明する。EXAMPLE A separator for alkaline batteries according to one embodiment of the present invention and a method for manufacturing the same will be described below.
（実施例 １）
市販の厚さ０．１５ｍｍ多孔度約６０％のポリプロピレ
ン不織布を５％発煙硫酸を含む濃硫酸に室温で７分間浸
漬すも 遠心分離機で硫酸を除去し水洗乾燥すム この
処理で不織布は白色から薄い褐色に変わる。これをポリ
ビニルアルコール７％水溶液と、濃硫酸を２倍に希釈し
た水溶液とを容積比１：１組成とした溶液に含浸二 余
分の溶液を除き１１５℃で加熱乾燥する。この処理によ
り不織布は黒褐色に変化する。水洗乾燥してセパレータ
を得も
水酸化ニッケル粉末、コバルト粉末それにニッケル粉末
を充填した公知の発泡式ニッケル極を正極へ 負極とし
てペースト式ＭｍＮｉ系水素吸蔵合金極を用いて密閉形
ニッケルー水素蓄電池を構成した 電解液として比重１
．３０の苛性カリ水溶液に３０ｇ／ｌの水酸化リチウム
を溶解して用い九 電池は５ｕｂＣ型である。この電池
をＡとする。(Example 1) A commercially available polypropylene nonwoven fabric with a thickness of 0.15 mm and a porosity of about 60% was immersed in concentrated sulfuric acid containing 5% oleum for 7 minutes at room temperature.The sulfuric acid was removed using a centrifuge, and the fabric was washed and dried. The treatment changes the nonwoven fabric from white to light brown. This was impregnated with a solution containing a 7% aqueous solution of polyvinyl alcohol and an aqueous solution obtained by diluting concentrated sulfuric acid twice in a volume ratio of 1:1.2 The excess solution was removed and dried by heating at 115°C. This treatment turns the nonwoven fabric blackish brown. A well-known foamed nickel electrode filled with nickel hydroxide powder, cobalt powder, and nickel powder is used as the positive electrode to obtain a separator after washing with water and drying.A sealed nickel-hydrogen storage battery is constructed using a paste-type MmNi hydrogen storage alloy electrode as the negative electrode. The electrolyte has a specific gravity of 1
．． The battery is of the 5ubC type. This battery is called A.
つぎに比較のために発煙硫酸に浸漬し ポリビニルアル
コール水溶液と濃硫酸の含浸を省略し他はＡと同じ製法
で得られた電池をＢとして加えんまず初期の放電電圧と
容量を比較し九 電池は１０セルずつ用（＼ ５時間率
で容量の１３０％定電流充電−１゜ ＯＡで０．９ｖま
での定電流放電を行なったとこへ 平均電圧はいずれも
１．２２〜１．２３Ｖで差はなかった 放電容量はＡが
２゜７５〜２．８０Ａｈであり、Ｂは２．５２〜２゜６
０Ａｈであった
つぎに両電池をやはり１０セルずつ用（＼ この充放電
の条件で寿命特性を比較しれ その結果放電容量が初期
の８０％にまで劣化するサイクル数１よ Ａが１１００
〜１２００サイクルでＢは９９０〜１０５０サイクルで
ありＡの方が優れていた この結果からＡは初期性能に
優れ その持続性も優れていることがわかっ九
（実施例 ２）
市販の厚さ０．１５ｍｍ多孔度約６０％のポリプロピレ
ン不織布を市販の９５％硫酸に１０５℃で１時間浸漬す
も 遠心分離機で硫酸を除去し水洗乾燥する。この処理
で不織布は白色から黒色に変わも これをポリビニルア
ルコール７％水溶液と、濃硫酸を２倍に希釈した水溶液
とを容積比ｌ＝１組成とした溶液に含浸し 余分の溶液
を除き１１５℃で加熱乾燥す４ この処理で不織布は黒
色のままであム 水洗乾燥してセパレータを得る。Next, for comparison, we immersed the battery in fuming sulfuric acid, omitted the impregnation with polyvinyl alcohol aqueous solution and concentrated sulfuric acid, and added a battery obtained by the same manufacturing method as A, except that it was added as B, and compared the initial discharge voltage and capacity. For 10 cells at a time (constant current charging to 130% of capacity at 5 hour rate - 1°) Constant current discharging up to 0.9V at OA The average voltage is 1.22 to 1.23V and the difference is The discharge capacity was 2.75 to 2.80 Ah for A, and 2.52 to 2.6 Ah for B.
Next, both batteries were used for 10 cells each (＼ Compare the life characteristics under these charging and discharging conditions. As a result, the number of cycles at which the discharge capacity deteriorates to 80% of the initial value is 1. A is 1100.
-1200 cycles, B had 990-1050 cycles, and A was superior.From this result, it was found that A had excellent initial performance and excellent durability (Example 2).Commercially available thickness 0. A 15 mm polypropylene nonwoven fabric with a porosity of about 60% is immersed in commercially available 95% sulfuric acid at 105°C for 1 hour, the sulfuric acid is removed using a centrifuge, and the fabric is washed with water and dried. This treatment changed the nonwoven fabric from white to black, but it was impregnated with a solution containing a 7% aqueous solution of polyvinyl alcohol and an aqueous solution diluted twice as much concentrated sulfuric acid at a volume ratio of 1 = 1, and the excess solution was removed and the temperature was raised to 115°C. During this process, the nonwoven fabric remains black and is washed with water and dried to obtain a separator.
実施例１と同様公知の発泡式ニッケル極を正極に 負極
としてペースト式カドミウム極を用いて密閉形ニッケル
ーカドミウム蓄電池を構成した電解液として比重１．３
０の苛性カリ水溶液に２５ｇ／ｌの水酸化リチウムを溶
解して用い九 電池は５ｕｂＣ型であａ この電池をＣ
とする。つぎに比較のために発煙硫酸に浸漬し ポリビ
ニルアルコール水溶液と濃硫酸の含浸を省略し他はＡと
同じ製法で得られた電池をＤとして加え九まず初期の放
電電圧と容量を比較した 電池は１０セル用ｔ、ｋ
５時間率で容量の１３０％定電流充電−１，ＯＡで０．
９Ｖまでの定電流放電を行なったとこへ 平均電圧はい
ずれも１．２３〜１゜２４Ｖで差はなかった 放電容量
はＣが２．２５〜２．３０Ａｈであり、Ｄは２．１２．
〜２，１８Ａｈであった
つぎに両電池をやはり１０セルずつ用１．％ この充
放電の条件で寿命特性を比較し九 その結果放電容量が
初期の８０％にまで劣化するサイクル数は Ｃが１３０
０〜１３５０サイクルでＤは１１００〜１２００サイク
ルであり、Ｃの方が優れていた この結果からＣは初期
性能に優れ その持続性も掻めて優れていることがわが
っななおいずれの実施例の場合も発煙硫酸や濃硫酸によ
る処理を実施例よりも極端に行なうと不織布の強度が低
下し電池組み立て時に破損する場合が生じたので特性の
解明は中止した
発明の効果
以上の実施例の説明で明らかなよう艮 本発明のアルカ
リ蓄電池用セパレータとその製造法によれは 発煙硫酸
または濃硫酸でポリオレフィン製多孔体を処理し その
後これをポリビニルアルコルと硫酸を含む溶液に含浸し
これを加熱して得られたセパレータを用いることによ
り、活物質の利用率が向上し初期特性に優れ 長寿命の
アルカリ電池が得られもAs in Example 1, a sealed nickel-cadmium storage battery was constructed using a known foamed nickel electrode as the positive electrode and a paste cadmium electrode as the negative electrode.The electrolyte had a specific gravity of 1.3.
25g/l of lithium hydroxide was dissolved in a 0.0% caustic potassium aqueous solution.
shall be. Next, for comparison, we immersed the battery in fuming sulfuric acid, omitted the impregnation with polyvinyl alcohol aqueous solution and concentrated sulfuric acid, and added a battery obtained by the same manufacturing method as A as D, except that the initial discharge voltage and capacity were compared. t, k for 10 cells
Constant current charging at 130% capacity at a 5 hour rate -1, OA at 0.
When constant current discharge was performed up to 9V, the average voltage was 1.23 to 1.24V, with no difference.The discharge capacity was 2.25 to 2.30Ah for C, and 2.12Ah for D.
~2.18Ah. Next, both batteries were used for 10 cells each. % Comparing the life characteristics under these charging and discharging conditions9 As a result, the number of cycles at which the discharge capacity deteriorates to 80% of the initial value is 130 for C.
0 to 1350 cycles, D was 1100 to 1200 cycles, and C was better.From this result, it can be seen that C has excellent initial performance and is also superior in its sustainability. In the case of , if the treatment with fuming sulfuric acid or concentrated sulfuric acid was more extreme than in the example, the strength of the nonwoven fabric decreased and it could break during battery assembly, so elucidation of the characteristics was discontinued.Explanation of the example beyond the effect of the invention As is clear from the above, the separator for alkaline storage batteries of the present invention and its manufacturing method are as follows: A porous polyolefin material is treated with oleum or concentrated sulfuric acid, and then it is impregnated with a solution containing polyvinyl alcohol and sulfuric acid, and then heated. By using the obtained separator, the utilization rate of the active material is improved, and an alkaline battery with excellent initial characteristics and long life can be obtained.
Claims (6)
硫酸処理したポリビニルアルコールで被覆してなるアル
カリ電池用セパレータ。(1) Polyolefin porous body treated with fuming sulfuric acid,
A separator for alkaline batteries coated with polyvinyl alcohol treated with sulfuric acid.
酸処理したポリビニルアルコールで被覆してなるアルカ
リ電池用セパレータ。(2) A separator for alkaline batteries comprising a polyolefin porous body treated with concentrated sulfuric acid and coated with polyvinyl alcohol treated with sulfuric acid.
、硫酸を含むポリビニルアルコール溶液に含浸して加熱
するアルカリ電池用セパレータの製造法。(3) A method for producing a separator for alkaline batteries in which a polyolefin porous body is treated with oleum and then impregnated with a polyvinyl alcohol solution containing sulfuric acid and heated.
後、硫酸を含むポリビニルアルコール溶液に含浸して加
熱するアルカリ電池用セパレータの製造法。(4) A method for producing a separator for alkaline batteries in which a polyolefin porous body is immersed in concentrated sulfuric acid at high temperature, and then impregnated with a polyvinyl alcohol solution containing sulfuric acid and heated.
布である請求項１または２記載のアルカリ電池用セパレ
ータ。(5) The separator for alkaline batteries according to claim 1 or 2, wherein the polyolefin porous body is a polypropylene nonwoven fabric.
布である請求項３または４記載のアルカリ電池用セパレ
ータの製造法。(6) The method for producing a separator for alkaline batteries according to claim 3 or 4, wherein the polyolefin porous body is a polypropylene nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242101A JPH04121948A (en) | 1990-09-11 | 1990-09-11 | Separater for alkaline battery and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242101A JPH04121948A (en) | 1990-09-11 | 1990-09-11 | Separater for alkaline battery and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04121948A true JPH04121948A (en) | 1992-04-22 |
Family
ID=17084320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2242101A Pending JPH04121948A (en) | 1990-09-11 | 1990-09-11 | Separater for alkaline battery and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04121948A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62115657A (en) * | 1985-11-13 | 1987-05-27 | Matsushita Electric Ind Co Ltd | Sealed nickel-hydrogen storage battery |
| JPH01255162A (en) * | 1988-04-04 | 1989-10-12 | Matsushita Electric Ind Co Ltd | Battery separator and its manufacture |
| JPH02174056A (en) * | 1988-12-27 | 1990-07-05 | Matsushita Electric Ind Co Ltd | Manufacture of separator for alkaline storage battery |
-
1990
- 1990-09-11 JP JP2242101A patent/JPH04121948A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62115657A (en) * | 1985-11-13 | 1987-05-27 | Matsushita Electric Ind Co Ltd | Sealed nickel-hydrogen storage battery |
| JPH01255162A (en) * | 1988-04-04 | 1989-10-12 | Matsushita Electric Ind Co Ltd | Battery separator and its manufacture |
| JPH02174056A (en) * | 1988-12-27 | 1990-07-05 | Matsushita Electric Ind Co Ltd | Manufacture of separator for alkaline storage battery |
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