2012 Fiscal Year Final Research Report
Development of high ion conductive glass-ceramics for realizingall-solid-state batteries
| Project/Area Number |
21246098
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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 | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TADANAGA Kiyoharu 大阪府立大学, 大学院・工学研究科, 准教授 (90244657)
HAYASHI Akitoshi 大阪府立大学, 大学院・工学研究科, 助教 (10364027)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 固体電解質 / 硫化物電解質 / ガラス / ガラスセラミックス / 全固体電池 / リチウム電池 |
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| Research Abstract |
Glass-ceramic Li_2S-P_2S_5 electrolytes with a high conductivity of over 5×10^<-3>S cm^<-1>at room temperature were prepared by optimizing preparation conditions of mother glasses, crystallization conditions, glass compositions. Chemical stability of sulfide electrolytes under exposure to air atmosphere was evaluated. The electrolyte with 75 mol% Li_2S showed the highest chemical stability in the binary system Li_2S-P_2S_5. Furthermore, the addition of metal oxides as H_2S absorbents was effective in reducing H_2S gas generation from the electrolytes. All-solid-state In / LiCoO_2 cells with the prepared electrolytes operated as secondary batteries with good cyclability.
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