2011 Fiscal Year Final Research Report
Synthesis of Silicon-Alloy Composite Thick-Film Anodes Using Gas-Deposition for Lithium Secondary Batteries
| Project/Area Number |
21550172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials/Devices
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| Research Institution | Tottori University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
USUI Hiroyuki 鳥取大学, 大学院・工学研究科, 助教 (60423240)
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| Project Period (FY) |
2009 – 2011
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| Keywords | リチウム二次電池 / 負極 / ケイ素 / 合金 / シリサイド / ガスデポジション / 厚膜 |
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| Research Abstract |
Thick-film electrodes of composite active materials consisted of Si and various metal silicides were prepared by mechanical alloying followed by gas deposition for anodes of Li-ion batteries. We investigated a relationship between the performance of these electrodes and properties of the silicides, the electrical resistivity, the referential breaking strength, and the thermodynamic stability. The LaSi_2/Si composite electrode exhibited superb cycling performance. It is suggested that thermodynamically stable LaSi_2 in the composite electrode can improve the electrical conductivity of the electrode and can release the stress induced by a volumetric change of Si for a long period.
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