Abstract Copper sulfide is one of the promising cathode materials for the next-generation secondary batteries due to its high electrical conductivity and relatively high capacity. The outstanding cycling performance of sulfur-rich CuS1+x (0.58 ≤ x ≤ 0.61) cathode material obtained by one-step spray pyrolysis was demonstrated in this work. A simple approach of increasing the sulfur content up to CuS1.58 achieved ~900 mAh g−1 for 20 cycles at 0.1C. Furthermore, a small addition of carbon (5 wt%) by wet ball milling extremely enhanced discharge capacity to 1200 mAh g−1.

中文翻译：

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锂电池用富硫 CuS1+x 正极

摘要 硫化铜具有较高的导电性和较高的容量，是下一代二次电池很有前景的正极材料之一。这项工作证明了通过一步喷雾热解获得的富硫 CuS1+x (0.58 ≤ x ≤ 0.61) 正极材料的优异循环性能。一种将硫含量增加到 CuS1.58 的简单方法在 0.1C 下进行 20 次循环后达到 ~900 mAh g-1。此外，通过湿球磨添加少量碳（5 wt%）极大地提高了放电容量至 1200 mAh g-1。