2001 Fiscal Year Final Research Report Summary
RESEARCH ON CERAMICS BATTERIES
| Project/Area Number |
10555311
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
無機工業化学
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| Research Institution | KOBE UNIVERSITY |
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Principal Investigator |
KANNO Ryoji KOBE UNIVERSITY, Science, Associate Professor, 理学部, 助教授 (90135426)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEDA Yasuo Mie University, Professor, 工学部, 教授 (60093051)
TAKANO Mikio Kyoto University, Professor, 化学研究所, 教授 (70068138)
KAWAMOTO Yoji KOBE UNIVERSITY, Science, Professor, 理学部, 教授 (00030776)
NITTA Yoshiaki Matsushita electric co., Leader, 電池開発センター, 室長
NAKAMURA Tatsuya Toda Kogyo ind., Resercher, 創造本部, 主任研究員
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| Project Period (FY) |
1998 – 2000
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| Keywords | THIO-LISICON / LITHIUM ION CONDUCTOR / LITHIUM SECONDARY BATTERY / ALL SOLID STATE CELL / 超イオン導電体 |
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| Research Abstract |
The new crystalline material-family, the 'thio-LISICON' (Lithium SuperIonic CONductor), was found in the Li_2S-GeS_2-P_2S_s system. The solid solution at x = 0.75 in Li_<4-x>Ge_<1-2>P_2S_4 shows the highest conductivity of 2.2 x 10^<-3> Scm^<-1> at 25℃ amongst sintered ceramics, together with negligible electronic conductivity, high electrochemical stability, no reaction with lithium metal, and no phase transition up to 500℃. Its material-design concepts of changing constituent ions with various ionic radii, valence, and polarizability are studied.
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