Regeneration of Metal Sulfides in the Delithiation Process: The Key to Cyclic Stability

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• 作者：Xiaomin Li ; Jiantao Zai ; Shijie Xiang ; Yuanyuan Liu ; Xiaobo He ; Zheying Xu ; Kaixue Wang ; Zifeng Ma and Xuefeng Qian
• 刊名：Advanced Energy Materials
• 出版年：2016
• 出版时间：October 12, 2016
• 年：2016
• 卷：6
• 期：19
• 全文大小：6055K
• ISSN：1614-6840

文摘

The regeneration of metal sulfides during the delithiation process is the key to achieving cyclic stability in electrode materials. A graphene-supported peony-like MoS₂ nanocomposite with a long cycle life and a high rate capability is designed for this purpose. The synergistic effects of the MoS₂ hierarchical structure and graphene can effectively improve the lithium diffusion dynamics and conductivity, thus greatly suppressing the oxidation of Li₂S to polysulfides by improving the reversibility of the conversion reaction.