A modified carbothermal reduction method for preparation of high-performance nano-scale core/shell Cu6Sn5 alloy anodes in Li-ion batteries

Wangjun Cui, Fei Wang, Jie Wang, Haijing Liu, Congxiao Wang, Yongyao Xia*

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

Core-shell structured, carbon-coated, nano-scale Cu6Sn 5 has been prepared by a modified carbothermal reduction method using polymer coated mixed oxides of CuO and SnO2 as precursors. On heat treatment, the mixture oxides were converted into Cu6Sn5 alloy by carbothermal reduction. Simultaneously, the remnants carbon was coated on the surface of the Cu6Sn5 particles to form a core-shell structure. Transmission electron microscope (TEM) images demonstrate that the well-coated carbon layer effectively prevents the encapsulated, low melting point alloy from out flowing in a high-temperature treatment process. Core-shell structured, carbon coated Cu6Sn5 delivers a reversible capacity of 420 mAh g-1 with capacity retention of 80% after 50 cycles. The improvement in the cycling ability can be attributed to the fact that the carbon-shell prevents aggregation and pulverization of nano-sized tin-based alloy particles during charge/discharge cycling.

本文言語English
ページ(範囲)3633-3639
ページ数7
ジャーナルJournal of Power Sources
196
7
DOI
出版ステータスPublished - 2011 4 1
外部発表はい

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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