Lithium-sulfur battery (Li–S) is considered as one of the new-generation rechargeable batteries with high performance because of its extremely high theoretical capacity, energy density, environmental harmony and low cost. However, low electrical and ionic conductivity of sulfur, safety concerns and parasitic reaction generated by the dissolved polysulfide species in electrolyte hinder the commercialization of Li–S battery. Herein, we report a polyhedral porous structure comprising of carbon coating metal selenide nanoparticles (CoSe₂/C), which could not only host sulfur for Li-S battery owing to its porous and conductive structure, but also mitigate the shuttle phenomenon by polysulfides adsorption and catalytic acceleration of redox kinetics. As a result, a performance enhanced CoSe₂/C-S electrode for Li-S battery is achieved.

锂硫电池（Li–S）具有极高的理论容量，能量密度，环境和谐性和低成本，因此被认为是高性能的新一代可充电电池之一。但是，硫的低电导率和离子电导率，安全性问题以及电解质中溶解的多硫化物种类产生的寄生反应阻碍了Li-S电池的商业化。本文中，我们报道了一种由碳包覆的金属硒化物纳米颗粒（CoSe ₂ / C）构成的多面体多孔结构，由于其多孔和导电结构，它不仅可以容纳Li-S电池中的硫，而且可以缓解多硫化物吸附带来的穿梭现象和催化氧化还原动力学。结果，性能增强了CoSe ₂实现了锂电池的/ CS电极。