Electrochemical characteristics of ternary compound CoSbS for application in Li secondary batteries

The ternary compound cobalt antimony sulfide (CoSbS; mineral name: paracostibite) and CoSbS/C nanocomposite were prepared using simple solid-state synthetic routes, and their potential as electrode materials for rechargeable Li batteries was investigated. The reaction mechanism between CoSbS and Li was examined using ex situ X-ray diffraction and extended X-ray absorption fine structure analyses. The fabricated CoSbS/C nanocomposite electrode exhibited good electrochemical performances such as high capacity, long cycling behavior, and high rate capability.

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► The ternary compound CoSbS and CoSbS/C nanocomposite were prepared using simple solid-state synthetic routes.
► Their potential as electrode materials for rechargeable Li batteries was investigated.
► The reaction mechanism between CoSbS and Li was examined using ex situ XRD and EXAFS analyses.
► The fabricated CoSbS/C nanocomposite electrode exhibited excellent electrochemical properties.