Yang Xiaofei, Luo Jing, Sun Xueliang
Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON N6A 5B9, Canada.
Chem Soc Rev. 2020 Apr 7;49(7):2140-2195. doi: 10.1039/c9cs00635d.
Solid-state lithium-sulfur batteries (SSLSBs) with high energy densities and high safety have been considered among the most promising energy storage devices to meet the demanding market requirements for electric vehicles. However, critical challenges such as lithium polysulfide shuttling effects, mismatched interfaces, Li dendrite growth, and the gap between fundamental research and practical applications still hinder the commercialization of SSLSBs. This review aims to combine the fundamental and engineering perspectives to seek rational design parameters for practical SSLSBs. The working principles, constituent components, and practical challenges of SSLSBs are reviewed. Recent progress and approaches to understand the interfacial challenges via advanced characterization techniques and density functional theory (DFT) calculations are summarized and discussed. A series of design parameters including sulfur loading, electrolyte thickness, discharge capacity, discharge voltage, and cathode sulfur content are systematically analyzed to study their influence on the gravimetric and volumetric energy densities of SSLSB pouch cells. The advantages and disadvantages of recently reported SSLSBs are discussed, and potential strategies are provided to address the shortcomings. Finally, potential future directions and prospects in SSLSB engineering are examined.
具有高能量密度和高安全性的固态锂硫电池（SSLSBs）被认为是最有前途的储能装置之一，以满足电动汽车苛刻的市场需求。然而，多硫化锂穿梭效应、界面不匹配、锂枝晶生长以及基础研究与实际应用之间的差距等关键挑战仍然阻碍着固态锂硫电池的商业化。本综述旨在结合基础和工程视角，为实用的固态锂硫电池寻找合理的设计参数。综述了固态锂硫电池的工作原理、组成部件和实际挑战。总结并讨论了通过先进表征技术和密度泛函理论（DFT）计算来理解界面挑战的最新进展和方法。系统分析了一系列设计参数，包括硫负载量、电解质厚度、放电容量、放电电压和阴极硫含量，以研究它们对固态锂硫电池软包电池重量和体积能量密度的影响。讨论了最近报道的固态锂硫电池的优缺点，并提供了应对缺点的潜在策略。最后，探讨了固态锂硫电池工程潜在的未来方向和前景。
