Abstract To enhance the cycle stability of sulfur cathode for a high energy Li-S battery system, a novel sulfur@carbon nanocube (S@CNC) composite was prepared by encapsulating sulfur into micropores of CNCs by thermal treatment of a mixture of sublimed sulfur and CNCs. Electrochemical results demonstrated that encapsulating sulfur into individual insulated CNCs could effectively inhibit the aggregation of sulfur, eliminate excessive contact of sulfur species with the electrolyte and help confine the soluble lithium polysulfides. Additionally, the large surface area and thin shells of CNC hosts could facilitate rapid transport of Li+ ions and electrons to achieve superior rate capability and stable cycling performance.

中文翻译：

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在具有高循环稳定性的改进型锂硫电池正极材料中作为硫粒子宿主的先进中空碳纳米立方体

摘要 为了提高高能锂硫电池系统硫正极的循环稳定性，通过对升华的硫和硫的混合物进行热处理，将硫包裹在碳纳米管的微孔中，制备了新型硫@碳纳米立方体（S@CNC）复合材料。数控系统。电化学结果表明，将硫封装到单独的绝缘 CNC 中可以有效地抑制硫的聚集，消除硫物质与电解质的过度接触，并有助于限制可溶性多硫化锂。此外，CNC 主体的大表面积和薄壳可以促进锂离子和电子的快速传输，以实现优异的倍率性能和稳定的循环性能。