成果報告書詳細
管理番号20110000000981
タイトル*平成22年度中間年報 次世代自動車用高性能蓄電システム技術開発 次世代技術開発 全固体電池のための固体電解質及び三次元メソ構造体電極の研究開発
公開日2012/6/27
報告書年度2010 - 2010
委託先名国立大学法人東京工業大学
プロジェクト番号P07001
部署名スマートコミュニティ部
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
硫黄の理論容量は1672 mAh/g と高容量であり、次世代型電池材料として有望であるが、その特性は達成されていない。全固体電池は、安全性を確保し高出力・高エネルギー密度が可能な電池形態である。
英文要約Title: Development of High-performance Battery System for Next-generation Vehicles / Technical Development for Next-generation / Research & Development of solid electrolyte for all solid-state battery and electrode with three dimensional meso-structure (FY2007-FY2011) FY2010 Annual Report
The present study focused on the following subjects; (i) development of all solid-state lithium batteries with elemental sulfur electrode, and (ii) development of lithium solid electrolyte, thio-LISICON. All solid-state battery was examined for the composites of sulfur and carbon with two and three dimensional structures. Meso-porous carbon and carbon replica were used for the framework structure with the pore size of 6 – 120 nm. The composite electrodes before and after the sulfur vapor treatment were characterized by XRD, SAXS, BET and electrochemical measurements. The optimum pore size for all solid-state lithium battery was evaluated, the composite electrode of about 10 nm pore size showed a capacity over 1000 mAh/g, and the maximum capacity of 1800 mAh/g was obtained for the composites using the carbon of 12 nm pore size. Relationship between the structure and ionic conductivity was studied for Li3PS4. Three modifications were clarified by high temperature X-ray diffraction measurement, and these phases were indexed as  and phases. Li3.35P0.93S4 synthesized at 700°C has the type structure and the conductivity improved with the annealing treatment at 500°C.
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