2014 Fiscal Year Final Research Report
Preparation of pyrocarbon/silicon/carbon-fiber composite materials for anode of lithium-ion battery
| Project/Area Number |
24550238
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic industrial materials
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| Research Institution | Aichi Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | リチウムイオン電池 / 炭素 / シリコン / CVD / コーティング |
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| Outline of Final Research Achievements |
In present study, silicon and pyrocarbon was coated on the low crystalline carbon fibers as core carbon using chemical vapor deposition technique, and effect of the thin film silicon / pyrocarbon coating on electrochemical properties was examined.
Crystalline silicon was deposited on core carbon without the formation of SiC that was inert with lithium. Charge capacity (Li de-intercalation) of the pristine carbon fiber was successfully increased up to 1150 mAh/g by coating with 22 mass% silicon and 7 mass% pyrocarbon. Capacity fade was occurred during the charge-discharge cycling for the sample of carbon fiber coated with silicon only. Cycle ability was improved for the sample coated with both silicon and pyrocarbon. It is considered that thin pyrocarbon film is preferable for preventing the particle fracturing.
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| Free Research Field |
電気化学、無機材料合成
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