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Title:
NONAQUEOUS ELECTROLYTIC CELL AND ITS MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2008/029899
Kind Code:
A1
Abstract:
Gas is not produced in a nonaqueous electrolytic cell having a negative electrode containing a negative electrode active material such as lithium titanate. Especially, gas is not produced during storage at high temperatures to prevent the nonaqueous electrolytic cell from swelling. A nonaqueous electrolytic cell comprises a nonaqueous electrolyte containing an electrolytic salt and a nonaqueous solvent, a positive electrode, and a negative electrode containing a negative electrode material into/from which lithium ions are inserted/desorbed at a potential higher than the lithium potential by 1.2 V. The nonaqueous electrolytic cell is characterized in that the nonaqueous electrolyte contains vinylene carbonate, the negative electrode has a coating thereon, and the nonaqueous electrolytic cell is used in a range of negative electrode potential nobler than the lithium potential by 0.8 V. A nonaqueous electrolytic cell manufacturing method is characterized in that a nonaqueous electrolyte containing vinylene carbonate is used, the initial charging/discharging is carried out under a condition that the negative potential in the completed charged state exceeds the lithium potential by 0.8 V, a coating is formed on the surface of the negative electrode or a coating is formed on the surface of the negative electrode at the initial charging/discharging in such a way at least once, the negative potential is lowered below the lithium potential by 0.4 V.

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Inventors:
KOZONO, Suguru (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
小園卓 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
YUKIMOTO, Kazusa (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
行本和紗 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
YAMATE, Shigeki (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
山手茂樹 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
YAMAFUKU, Taro (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
Application Number:
JP2007/067452
Publication Date:
March 13, 2008
Filing Date:
August 31, 2007
Export Citation:
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Assignee:
GS YUASA CORPORATION (1 Inobaba-cho, Nishinosho Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
株式会社ジーエス・ユアサコーポレーション (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地 Kyoto, 6018520, JP)
KOZONO, Suguru (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
小園卓 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
YUKIMOTO, Kazusa (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
行本和紗 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
YAMATE, Shigeki (1 Inobaba-cho, Nishinosho, Kisshoin, Minami-ku, Kyoto-sh, Kyoto 20, 6018520, JP)
山手茂樹 (〒20 京都府京都市南区吉祥院西ノ庄猪之馬場町１番地株式会社ジーエス・ユアサコーポレーション内 Kyoto, 6018520, JP)
International Classes:
H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M4/66; H01M10/0525; H01M10/36
Attorney, Agent or Firm:
MATSUMOTO, Satoru (KYOBASHI PATENT OFFICE, Taiho Building 5th Floor17-6, Kyobashi 1-Chome, Chuo-K, Tokyo 31, 1040031, JP)
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