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Crystalline Multi‐Metallic Compounds as Host Materials in Cathode for Lithium–Sulfur Batteries
Author(s) -
Jiang YiCheng,
Arshad Hafiz Muhammad Umair,
Li HaoJie,
Liu Sheng,
Li GuoRan,
Gao XuePing
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202005332
Subject(s) - polysulfide , materials science , sulfur , metal , chemical engineering , adsorption , cathode , catalysis , inorganic chemistry , lithium (medication) , transition metal , carbon fibers , electrode , composite number , chemistry , organic chemistry , composite material , metallurgy , electrolyte , medicine , engineering , endocrinology
Lithium–sulfur (Li–S) battery is one of the most promising next‐generation rechargeable batteries. Lots of fundamental research has been done for the problems during cycling like capacity fading and columbic efficiency reducing owing to severe diffusion and migration of polysulfide intermediates. In the early stage, a wide variety of carbon materials are used as host materials for sulfur to enhance electrical conductivity and adsorb soluble polysulfides. Beyond carbon materials, metal based polar compounds are introduced as host materials for sulfur because of their strong catalytic activity and adsorption ability to suppress the shuttle effect. In addition, relatively high density of metal compounds is helpful for increasing volumetric energy density of Li–S batteries. This review focuses on crystalline multi‐metal compounds as host materials in sulfur cathodes. The multi‐metal compounds involve not only transition metal composite oxides with specific crystalline structures, binary metal chalcogenides, double or complex salts, but also the metal compounds doped or partially substituted by other metal ions. Generally, for the multi‐metal compounds, microstructure and morphologies in micro–nano scale are very significant for mass transfer in electrodes; moreover, adsorption and catalytic ability for polysulfides make fast kinetics in the electrode processes.