The development of all-solid-state lithium–sulfur (Li–S) batteries is a promising way to solve the problems of sulfur dissolution and shuttling. Herein, a carbon matrix (GO–PEG) consisting of a lithium ion conductor (PEG) is synthesized by grafting PEG onto the surface of graphene oxide (GO) via an esterification reaction. Sulfur is in situ precipitated onto the surface of GO–PEG to form GO–PEG@C/S cathode materials in a one-pot reaction. The GO–PEG@C/S cathode materials show uniform distribution of sulfur nanoparticles on ionically and electrically conductive nanosheets. When the cathode is fabricated into an all-solid-state lithium–sulfur battery with a solid polymer electrolyte, the battery exhibits a high initial discharge capacity of 1225 mA h g?1 at 0.2C (80 °C) and good cycling stability with a capacity retention of 86.6% after 100 discharge–charge cycles at 2C and 80 °C. These results demonstrate that the introduction of a lithium ion conductor into the matrix skeleton of the sulfur cathode can enhance the comprehensive electrochemical properties of all-solid-state Li–S batteries.
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机译：开发全固态锂硫（Li–S）电池是解决硫溶解和穿梭问题的一种有前途的方法。本文中，通过酯化反应将PEG接枝到氧化石墨烯（GO）的表面上，从而合成了由锂离子导体（PEG）组成的碳基质（GO-PEG）。一锅法反应中，硫原位沉淀在GO–PEG表面，形成GO–PEG @ C / S阴极材料。 GO–PEG @ C / S阴极材料在离子和导电纳米片上显示出硫纳米粒子的均匀分布。当将阴极制成带有固态聚合物电解质的全固态锂硫电池时，该电池具有1225 mA hg ？1 的高初始放电容量在0.2C（80°C）的温度下保持良好的循环稳定性，在2C和80°C下进行100次充放电循环后，容量保持率为86.6％。这些结果表明，将锂离子导体引入硫阴极的骨架中可以增强全固态Li–S电池的综合电化学性能。
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