复合隔膜在锂硫电池中的应用评述

Progress in composite separators for lithium sulfur batteries

电子设备和电动汽车的迅猛发展加速了社会对高比能量储能系统的需求。锂硫电池凭借其高能量密度、较低的活性材料价格和环境友好等特性受到广泛关注。然而,锂硫电池循环过程中较低的库仑效率、较高的正极容量衰减率以及不稳定的负极/电解液界面等问题仍有待解决。通过合理选择和设计复合隔膜材料,可有效改善锂硫电池中的性能缺陷,从而为锂硫电池性能提升和实用化提供新的思路。本文评述了锂硫电池中复合隔膜及隔膜修饰材料方面的研究进展,从碳材料、高分子材料、无机化合物材料等角度分别总结了复合隔膜的结构和性能特点,并讨论了锂硫电池隔膜的发展方向。

The rapid developments of electronic devices and electric vehicles have driven the ever increasing demands on high energy density energy storage system. Lithium-sulfur （Li-S） batteries have been strongly considered due to their high theoretical specific energy density, low cost of active materials, and excellent environmental benignity. However, the electrochemical performance of Li-S batteries suffers from a low coulombic efficiency, a rapid capacity degradation, and unstable anode-electrolyte interfaces, etc. The incorporation of rationally designed composite separator system is beneficial to mitigate these shortcomings towards the practical applications of Li-S batteries. In this contribution, the recent processes of composite separators with functional materials （such as carbon, polymer, inorganic compound, etc.） and novel structures were reviewed. The prospects for the development of separator in Li-S system are also involved.