发明授权
- 专利标题: Electric double layer capacitor and electrolytic solution therefor
- 专利标题(中): 双电层电容器及其电解液
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申请号: US11474351申请日: 2006-06-26
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公开(公告)号: US07436651B2公开(公告)日: 2008-10-14
- 发明人: Masayuki Takeda , Hideo Nagaoka , Hiroo Miyauchi , Takeshi Fujino , Byoungju Lee
- 申请人: Masayuki Takeda , Hideo Nagaoka , Hiroo Miyauchi , Takeshi Fujino , Byoungju Lee
- 申请人地址: JP Tokyo JP Tokyo
- 专利权人: Mitsubishi Chemical Corporation,Honda Motor Co., Ltd.
- 当前专利权人: Mitsubishi Chemical Corporation,Honda Motor Co., Ltd.
- 当前专利权人地址: JP Tokyo JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2005-192208 20050630; JP2006-170299 20060620
- 主分类号: H01G9/00
- IPC分类号: H01G9/00
摘要:
The present invention provides an electric double layer capacitor which has electrodes made of an alkali-activated carbon, prepared from a graphitic material, useful in manufacturing high-capacitance capacitors and which has an electrolytic solution containing chain carbonate and/or cyclic carbonate. Even if the electric double layer capacitor is used under high-temperature and high-voltage conditions, chain carbonate and/or cyclic carbonate is prevented from being degraded and the amount of generated gas is slight. The electric double layer capacitor has high initial performance and energy density and the performance of the electric double layer capacitor is maintained high. The electrolytic solution contains a quaternary ammonium salt except for a quaternary ammonium salt containing a carbon atom being bonded to the quaternary nitrogen atom and being bonded to other nitrogen atom than the quaternary nitrogen atom, chain carbonate and/or cyclic carbonate, and a solvent containing a carboxylic ester which contains five or more carbon atoms and which has two or more carboxylic ester bonds.