Sulfur Immobilization by “Chemical Anchor” to Suppress the Diffusion of Polysulfides in Lithium–Sulfur Batteries
Sulfur Immobilization by “Chemical Anchor” to Suppress the Diffusion of Polysulfides in Lithium–Sulfur Batteries
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DOI：
10.1002/admi.201701274
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发表时间：
2018-02
影响因子：
5.4
通讯作者：
Zhipeng Zeng;Xingbo Liu
中科院分区：
文献类型：
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作者：
Zhipeng Zeng;Xingbo Liu
锂硫（Li-S）电池因其高理论能量密度（约2600 Wh kg−1）而被认为是下一代高能量存储最有前途的竞争者之一，比商用LiCoO2/石墨电池高出近五倍。然而，一系列问题，特别是多硫化锂（LiPSs）的溶解及其“穿梭效应”极大地限制了其广泛的商业应用。从解决这些问题的传统方法的简要概述开始，本综述重点介绍的成果主要表明，通过在 LiPS 和基质材料之间形成强大的“化学锚”，可以有效抑制 LiPS 的扩散。根据LiPS与主体材料之间不同类型的化学键合，综述了合成方法和表征技术。这里还总结了理论计算方法，以进一步理解这些“化学锚”的作用。本文提出了一些观点和未来的研究工作，希望能够在不久的将来提供深入的理解，并为长循环寿命和高能量/功率密度的锂硫电池的合理设计提供途径。
Lithium–sulfur (Li–S) battery is considered to be one of the most promising contenders for the next generation high‐energy storages due to their high theoretical energy density (≈2600 Wh kg−1), which is nearly five times higher than that of the commercial LiCoO2/graphite batteries. However, a series of issues especially for the dissolution of lithium polysulfides (LiPSs) and their “shuttle effect” greatly limit their widely commercial applications. Starting from a brief overview of conventional methods to solve these problems, the achievements spotlighted in this review mainly show that the diffusion of LiPSs can be effectively suppressed by forming strong “chemical anchor” between LiPSs and host materials. The synthetic methods and characterization techniques are reviewed according to different types of chemical bonding between LiPSs and the host materials. Theoretical calculation methods are also summarized here to further understanding the role of these “chemical anchors.” Proposing with some perspectives and future research efforts, this review is hoped to provide an in‐depth understanding and offer avenues in the rational design of Li–S batteries with long cycle life and high energy/power density in the near future.