Abstract

Li-S batteries (LSBs) have been considering as new and promising energy storage systems because of the high theoretical energy density and low price. Nevertheless, their practical application is inhibited by several factors, including poor electrical conductivity of electrode materials, greatly volumetric variation, as well as the polysulfide formation upon the cycling. To address these problems, it is imperative to develop and design effective and suitable sulfur host anode materials. Metal organic frameworks (MOFs)-based cathode materials, possessing their good conductivity and easy morphology design, have been extensively studied and exhibited enormously potential in LSBs. In this review, a comprehensive overview of MOFs-based sulfur host materials is provided, including their electrochemical reaction mechanisms, related evaluation parameters, and their performances used in LSBs in the past few years. In particular, the recent advances using in-situ characterization technologies for investigating the electrochemical reaction mechanism in LSBs are presented and highlighted. Additionally, the challenges and prospects associated with future research on MOF-related sulfur host materials are discussed. It is anticipated to offer the guidance for the identification of suitable MOFs-based sulfur cathode materials for high-performance LSBs, thereby contributing for the achievement of a sustainable and renewable society.

中文翻译：

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用于先进锂硫电池的金属有机框架正极材料：全面综述

摘要

由于理论能量密度高和价格低廉，锂硫电池（LSB）一直被认为是新型且有前途的储能系统。然而，它们的实际应用受到多种因素的抑制，包括电极材料的导电性差、体积变化大以及循环时形成多硫化物。为了解决这些问题，当务之急是开发和设计有效且合适的硫主体负极材料。基于金属有机框架（MOF）的正极材料具有良好的导电性和易于形貌设计，已被广泛研究并在LSB中展现出巨大的潜力。在这篇综述中，对基于MOFs的硫主体材料进行了全面的概述，包括它们的电化学反应机制、相关的评估参数以及过去几年在LSB中使用的性能。特别是，介绍并强调了使用原位表征技术研究 LSB 电化学反应机制的最新进展。此外，还讨论了 MOF 相关硫主体材料未来研究的挑战和前景。预计将为高性能LSB确定合适的基于MOF的硫正极材料提供指导，从而为实现可持续和可再生社会做出贡献。