1997 Fiscal Year Final Research Report Summary
ALL SOLID BATTERIES USING IONIC CONDUCTIVE THIN FILM
| Project/Area Number |
07555270
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
工業物理化学
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| Research Institution | MIE UNIVERSITY |
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Principal Investigator |
YAMAMOTO Osamu MIE UNIVERSITY FACULTY OF ENGINEERING,DEPARTMENT OF CHEMISTRY,PROFESSOR, 工学部, 教授 (70023116)
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| Co-Investigator(Kenkyū-buntansha) |
KONNDO Sigeo Head researcher, Technical Laboratory, Matsushita Battery Co., 技術研究所, 主幹技師
IMANISHI Nobuyuki INSTRUMENTAL ANALYSIS CENTER,ASSOCIATE PROFESSOR, 機器分析センター, 助教授 (20223331)
TAKEDA Yasuo MIE UNIVERSITY FACULTY OF ENGINEERING,DEPARTMENT OF CHEMISTRY,ASSOCIATE PROFESSO, 工学部, 助教授 (60093051)
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| Project Period (FY) |
1995 – 1997
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| Keywords | SOLID ELECTROLYTE BATTERY / LITHIUM ION CONDUCTOR / SOLID STATE LITHIUM SECONDARY BATTERY / LITHIUM CALCOGENIDE GLASS / TEPE-CASTING METHOD / THIN FILM BATTERY |
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| Research Abstract |
Oxysulfide glass, Li_3PO_4-Li_2S-SiS_2, shows a high ionic conductivity of 1.4x10^<-3>S/cm at ambient temperature and a wide electrochemical window. It is chemically and electrochemically stable against lithium metal. Li_xCoO_2 and In-Li_x, were found to be good candidates for the electrode materials in solid state batteries with the glass for their electrode reaction with high reversibility. The operation voltage was 3.3V,which was a high voltage for a solid state battery. The solid state battery constructed with the materials reveals excellent cycling property, high rate capability up to almost 1mA/cm^2, and extremely small residual current. The preparation of the thin film was tried using the tape-casting method. The composite with the lithium ion conductive polymer such as PEO-lithium salts brought the thin film electrolyte and electrode with around ten mum thick and showed high lithium ionic conductivity of 10^<-4>S/cm at room temperature. These results make us expect the possibility of high safety lithium secondary battery.
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Research Products
(12 results)
