Wu Can, Lai Wei-Hong, Cai Xiaolan, Chou Shu-Lei, Liu Hua-Kun, Wang Yun-Xiao, Dou Shi-Xue
Institute of Powder and New Energy Material Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, Innovation Campus, University of Wollongong, Wollongong, NSW, 2500, Australia.
Small. 2021 Dec;17(48):e2006504. doi: 10.1002/smll.202006504. Epub 2021 Apr 28.
Alkali-metal/sulfur batteries hold great promise for offering relatively high energy density compared to conventional lithium-ion batteries. By providing viable sulfur composites that can be effectively used, carbonaceous hosts as a key component play critical roles in overcoming the preliminary challenges associated with the insulating sulfur and its relatively soluble polysulfides. Herein, a comprehensive overview and recent progress on carbonaceous hosts for advanced next-generation alkali-metal/sulfur batteries are presented. In order to encapsulate the highly active sulfur mass and fully limit polysulfide dissolution, strategies for tailoring the design and synthesis of carbonaceous hosts are summarized in this work. The sticking points that remain for sulfur cathodes in current alkali-metal/sulfur systems and the future remedies that can be provided by carbonaceous hosts are also indicated, which can lead to long cycling lifetimes and highly reversible capacities under repeated sulfur reduction reactions in alkali-metal/sulfur during cycling.
与传统锂离子电池相比，碱金属/硫电池在提供相对较高能量密度方面具有巨大潜力。通过提供可有效利用的可行硫复合材料，作为关键组件的碳质主体在克服与绝缘硫及其相对可溶的多硫化物相关的初步挑战中发挥着关键作用。本文对用于先进下一代碱金属/硫电池的碳质主体进行了全面概述和最新进展介绍。为了封装高活性硫物质并充分限制多硫化物溶解，本工作总结了定制碳质主体设计与合成的策略。还指出了当前碱金属/硫系统中硫阴极仍然存在的关键点以及碳质主体可以提供的未来补救措施，这可导致在循环过程中碱金属/硫的反复硫还原反应下具有长循环寿命和高可逆容量。
