Xiong Xiaosong, Yan Wenqi, You Chaolin, Zhu Yusong, Chen Yuhui, Fu Lijun, Zhang Yi, Yu Nengfei, Wu Yuping
State Key Laboratory of Materials-Oriented Chemical Engineering, School of Energy Science and Engineering, Nanjing Tech University, Nanjing, China.
Front Chem. 2019 Dec 10;7:827. doi: 10.3389/fchem.2019.00827. eCollection 2019.
The lithium-sulfur (Li-S) battery has received a lot of attention because it is characterized by high theoretical energy density (2,600 Wh/kg) and low cost. Though many works on the "shuttle effect" of polysulfide have been investigated, lithium metal anode is a more challenging problem, which leads to a short life, low coulombic efficiency, and safety issues related to dendrites. As a result, the amelioration of lithium metal anode is an important means to improve the performance of lithium sulfur battery. In this paper, improvement methods on lithium metal anode for lithium sulfur batteries, including adding electrolyte additives, using solid, and/or gel polymer electrolyte, modifying separators, applying a protective coating, and providing host materials for lithium deposition, are mainly reviewed. In addition, some challenging problems, and further promising directions are also pointed out for future research and development of lithium metal for Li-S batteries.
锂硫（Li-S）电池因其具有高理论能量密度（2600 Wh/kg）和低成本的特点而备受关注。尽管已经对多硫化物的“穿梭效应”进行了许多研究工作，但锂金属负极是一个更具挑战性的问题，它会导致电池寿命短、库仑效率低以及与枝晶相关的安全问题。因此，改善锂金属负极是提高锂硫电池性能的重要手段。本文主要综述了锂硫电池锂金属负极的改进方法，包括添加电解质添加剂、使用固体和/或凝胶聚合物电解质、改性隔膜、施加保护涂层以及提供锂沉积的主体材料。此外，还指出了一些具有挑战性的问题以及锂硫电池锂金属未来研发的进一步有前景的方向。
