Jie Xu , Qi Kang , Bo Peng , Zechao Zhuang , Dingsheng Wang , Lianbo Ma
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引用次数: 0
Abstract
Metal-sulfur electrochemistry represents a promising energy storage technology due to the natural abundance and unparalleled theoretical specific capacity of 1675 mAh g−1 of sulfur based on two-electron redox reaction (S0 ↔ S2−). Commercially viable metal-sulfur batteries (MSBs) are hindered by sluggish sulfur conversion kinetics, which reduce the utilization efficiency of sulfur and lead to polysulfide shuttling. Single-atom catalysts (SACs) exhibit specific catalytic activity, a high atomic utilization ratio, and flexible selectivity, and are considered exceptional electrocatalysts for addressing the intractable challenges encountered by the MSBs. This review summarizes the recent progress in SACs for boosting the sulfur electrochemistry in MSBs, focusing on sulfur host materials, modified separators and functional interlayers, and analyzes the in-depth mechanisms of SACs. Moreover, the correlation between the coordination environments and the intrinsic activity of SACs is discussed. Finally, the main challenges and potential research directions of SACs for high-energy–density and long-life MSBs are outlined. This study provides significant guidance for constructing novel SACs that can accelerate the sulfur conversion kinetics in MSBs.
金属硫电化学是一种很有前途的储能技术,因为基于双电子氧化还原反应(S0↔S2−)的硫的天然丰度和无与伦比的1675 mAh g−1理论比容量。硫转化动力学缓慢,降低了硫的利用效率,导致多硫穿梭,阻碍了金属硫电池(msb)的商业化。单原子催化剂(SACs)具有特定的催化活性,高原子利用率和灵活的选择性,被认为是解决msb遇到的棘手挑战的特殊电催化剂。本文综述了近年来活性炭在固体固体反应器中促进硫电化学的研究进展,重点介绍了硫宿主材料、改性隔膜和功能夹层的研究进展,并对活性炭的作用机理进行了深入分析。此外,还讨论了协同环境与sac内在活动之间的关系。最后,概述了高能量密度、长寿命MSBs中sac的主要挑战和潜在的研究方向。该研究为构建新型SACs,加速MSBs中硫转化动力学提供了重要的指导。
期刊介绍:
The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies.
This journal focuses on original research papers covering various topics within energy chemistry worldwide, including:
Optimized utilization of fossil energy
Hydrogen energy
Conversion and storage of electrochemical energy
Capture, storage, and chemical conversion of carbon dioxide
Materials and nanotechnologies for energy conversion and storage
Chemistry in biomass conversion
Chemistry in the utilization of solar energy