2010 Fiscal Year Final Research Report
Development of the Next-generation Highly-Safe Secondary Batteries for Dispersed Energy Systems towards Conquering the Trilemma
| Project/Area Number |
20360126
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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 | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
SAKURAI Yoji Toyohashi University of Technology, 大学院・工学研究科, 教授 (80452217)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 二次電池 / リチウムイオン電池 |
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| Research Abstract |
The electrochemical performances of micron-sized (av.>7μm) carbon-free LiFePO_4 was improved by the novel nitrogen doping. Nitrogen-doped LiFePO_4 (LiFePO_4-N) exhibited discharge capacity of 90 mAhg^<-1>, which is ca.1.5 times higher than that of C-free LiFePO_4 at 1 mAcm^<-2>, 20℃. This improvement was considered as the result of the lattice modification through the partial nitrogen substitution for oxygen, which might leads to the enhanced Li^+ ion diffusivity.
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