JP5514250B2 - 電気化学セル - Google Patents
電気化学セル Download PDFInfo
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- JP5514250B2 JP5514250B2 JP2012101952A JP2012101952A JP5514250B2 JP 5514250 B2 JP5514250 B2 JP 5514250B2 JP 2012101952 A JP2012101952 A JP 2012101952A JP 2012101952 A JP2012101952 A JP 2012101952A JP 5514250 B2 JP5514250 B2 JP 5514250B2
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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
-
- 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
- Y02E60/13—Energy storage using capacitors
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Description
この場合電気化学セルに可能な電圧は、電極材料の電気化学的な特性はもとより、電解液の溶媒の電位窓にも依存する。またコイン型やボタン型などの小型の電気化学セルは、機器の回路基板上に実装されるため、リフロー等の実装方法を可能にすることが求められ、高温耐性も求められる。
(実施例1)
図1は、本発明に係わる電気化学セルの一例であるボタン型セルの断面図である。ガスケット103を介して、負極缶101、正極缶102によりかしめにより封口されている。内部にはセパレータ113を介して負極111及び正極112が対向した構成となっている。電解液は負極111、正極112、セパレータ113に含浸されておりさらにセル内部の空隙を満たした構造となっている。
05)した場合、内部抵抗(交流法、周波数1kHz)の増加を、保存前の内部抵抗に対しての比率を表1に示した。
(実施例2)
図2には、本発明の電気化学セルの電極の対向する面にラジカル捕捉剤層201を設けた構造の一例を示している。具体的には、キシレン等の揮発性溶媒にフラーレンC60を溶解した溶液を、実施例1に示したキャパシタの正極ユニット及び負極ユニットの各電極のセパレータに接する面に前記フラーレン溶液を塗布し、フラーレン層を構築した以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
(実施例3)
図3には、本発明の電気化学セルの電極内にラジカル捕捉剤303が含有された状態を模式的に示した断面図である。具体的には、電極の組成がやしがら活性炭と導電材としてのカーボンブラックと結着剤としてポリテトラフルオロエチレンのディスパージョンとフラーレンC70を重量比で7.9:1:1:0.1とした以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
(実施例4)
図4には、本発明の電気化学セルの電極材料表面にラジカル捕捉剤402が配置された状態を模式的に示した断面図である。具体的には、揮発性溶媒に溶解したフラーレンC60の溶液にヤシガラ活性炭を混合し、溶媒を揮発させることでやしがら活性炭の表面にフラーレン層を設けた。それ以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
(実施例5)
図5には、本発明の電気化学セルのセパレータの電極に接する面にラジカル捕捉剤層501が配置された状態を模式的に示した断面図である。具体的には、揮発性溶媒に溶解したフラーレンC60の溶液をセパレータの両面に塗布し、溶媒を揮発させることでセパレータの表面にフラーレン層を設けた。それ以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
(実施例6)
図6は、本発明の電気化学セルの容器の内側にラジカル捕捉剤層601が配置された状態を模式的に示した断面図である。具体的には、揮発性溶媒に溶解したフラーレンC60の溶液を図6に示すとおり塗布し、溶媒を揮発させることで正極缶及び負極缶の内面にフラーレン層を設けた。それ以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
(実施例7)
フラーレンC60を1重量%混合した電解液を用いた以外は実施例1と同様にキャパシタを作成し、HTV80−05後の内部抵抗の変化を測定した。実施例1と同様に測定結果を表1に示す。
102 負極缶
103 ガスケット
111 正極
112 負極
113 セパレータ
201 ラジカル捕捉剤層
301 電極活物質
302 電子導電剤
303 電極内に含有されたラジカル捕捉剤
401 電極材料
402 電極材料表面のラジカル捕捉剤層
501 セパレータ表面に配置されたラジカル捕捉剤層
601 電気化学セル容器内面に配置されたラジカル捕捉剤層
Claims (3)
- 電気化学セルであって、
正極と、負極と、セパレータと、当該電気化学セル内に含浸され電解質を含む非水電解液と、を備え、
前記正極及び前記負極は、電極活物質と、電子導電剤と、を有し、
前記非水電解液の分解により生成される求核ラジカルを捕捉するラジカル捕捉剤が、前記非水電解液に含有されるとともに、前記電気化学セルの容器内面に前記ラジカル捕捉剤の層を配置したことを特徴とする電気化学セル。 - 前記ラジカル捕捉剤のうち前記非水電解液に含有されたものは、当該非水電解液に溶解されてなることを特徴とする請求項1に記載の電気化学セル。
- 前記ラジカル捕捉剤がフラーレンであることを特徴とする請求項2に記載の電気化学セル。
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