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首页> 外文期刊>International Journal of Electrochemical Science >A Simple Solution-Based Method to Prepare Honeycomb-Like Li2S/Graphene Composite for Lithium-Sulfur Batteries
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A Simple Solution-Based Method to Prepare Honeycomb-Like Li2S/Graphene Composite for Lithium-Sulfur Batteries

机译：基于溶液的简单方法制备锂硫电池蜂窝状Li 2 S /石墨烯复合材料

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In solution-based method, the nature of the solvent may play an important role to the nanostructure of Li2S/graphene composite. In this paper, considering anhydrous N-methylpyrrolidone (NMP) has good wetting ability with graphene and its function groups has high binding energies with Li2S, NMP was used as solvent to prepare Li2S/graphene composite. The structure morphology and electrochemical performance of as-prepared Li2S/graphene composite were investigated. Results show that numerous of nano-Li2S affiliate on graphene surface homogeneously. The existence of these nano-Li2S alleviate π-π interaction between graphene sheets, and Li2S/graphene composite exhibits honeycomb-like structure with abundant micropores. Due to this special structure, without extra treatment, the as- prepared Li2S/graphene composite exhibits improved electrochemical performance, such as high columbic efficiency, high energy capacity, a high rate capability, and a low potential barrier.
机译：在基于溶液的方法中，溶剂的性质可能对Li2S /石墨烯复合材料的纳米结构起重要作用。由于无水N-甲基吡咯烷酮（NMP）与石墨烯具有良好的润湿能力，且其官能团与Li2S的结合能高，因此，NMP被用作溶剂制备Li2S /石墨烯复合材料。研究了制备的Li2S /石墨烯复合材料的结构形态和电化学性能。结果表明，许多纳米Li2S均质地附着在石墨烯表面。这些纳米Li 2 S的存在减轻了石墨烯片之间的π-π相互作用，并且Li 2 S /石墨烯复合物表现出具有丰富微孔的蜂窝状结构。由于这种特殊的结构，无需额外的处理，所制备的Li2S /石墨烯复合材料就具有改善的电化学性能，例如高的库仑效率，高的能量容量，高的倍率能力和低的势垒。

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