Nanostructural CoSnC anode prepared by CoSnO3 with improved cyclability for high-performance Li-ion batteries

Wangjun Cui, Fei Wang, Jie Wang, Congxiao Wang, Yongyao Xia

Research output: Contribution to journalArticlepeer-review

Abstract

Stannate, CoSnO3, which mixes the elements Co and Sn evenly at the atomic level, was used as precursor to prepare CoSnC by a modified carbothermal reduction method. The synthesis process was characterized by differential thermal analysis (DTA) and X-ray diffraction (XRD). The particle feature was evaluated by transmission electron microscopy (TEM). The results indicated the as-prepared composite has a well-coated carbon layer that effectively prevents the encapsulated, low melting point alloy from out-flowing in a high-temperature treatment process. In addition, this structure, CoSn x grains surrounded by carbon, prevents aggregation and pulverization of nanosized, tin-based alloy particles during charge/discharge cycling and improves the cycling stability of the alloy. The synthesized CoSnC integrates the merits of intermetallic compounds and nanosized anode materials and delivers a reversible capacity of 450 mA h g-1 with a capacity retention of 72% after 50 cycles.

Original languageEnglish
Pages (from-to)4812-4818
Number of pages7
JournalElectrochimica Acta
Volume56
Issue number13
DOIs
Publication statusPublished - 2011 May 1
Externally publishedYes

Keywords

  • Carbothermal reduction
  • Hydrophobic powders
  • Intermetallic compounds
  • Lithium-ion battery

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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