Nanostructured Si/TiC composite anode for Li-ion batteries |
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Authors: | Z.Y. Zeng Y.Z. Yang J.Y. Xiang X.H. Huang F. Mao M. Ma |
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Affiliation: | Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract: | Si/TiC nanocomposite anode was synthesized by a surface sol-gel method in combination with a following heat-treatment process. Through this process, nanosized Si was homogeneously distributed in a titanium carbide matrix. The electrochemically less active TiC working as a buffer matrix successfully prevented Si from cracking/crumbling during the charging/discharging process. The interspaces in the Si/TiC nanocomposite could offer convenient channels for Li ions to react with active Si. The Si/TiC composite exhibited a reversible charge/discharge capacity of about 1000 mAh g−1 with average discharge capacity fading of 1.8 mAh g−1 (0.18%) from 2nd to 100th cycle, indicating its excellent cyclability when used as anode materials for lithium-ion batteries. |
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Keywords: | Nanosized Si Titanium carbide Nanocomposite anode Lithium-ion battery |
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