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A Delicately Designed Sulfide Graphdiyne Compatible Cathode for High‐Performance Lithium/Magnesium–Sulfur Batteries
Author(s) -
Du Huiping,
Zhang Zhonghua,
He Jianjiang,
Cui Zili,
Chai Jingchao,
Ma Jun,
Yang Ze,
Huang Changshui,
Cui Guanglei
Publication year - 2017
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.201702277
Subject(s) - polysulfide , faraday efficiency , electrolyte , sulfur , cathode , sulfide , materials science , electrochemistry , dissolution , lithium (medication) , inorganic chemistry , chemical engineering , nanotechnology , chemistry , electrode , metallurgy , medicine , engineering , endocrinology
Novel sulfur cathodes hold the key to the development of metal–sulfur batteries, the promising candidate of next‐generation high‐energy‐storage systems. Herein, a fascinating sulfur cathode based on sulfide graphdiyne (SGDY) is designed with a unique structure, which is composed of a conducting carbon skeleton with high Li + mobility and short sulfur energy‐storing unites. The SGDY cathode can essentially avoid polysulfide dissolution and be compatible with commercially available carbonate‐based electrolytes and Grignard reagent‐based electrolytes (all phenyl complex (APC) type electrolytes). Both the assembled Li–S and Mg–S batteries exhibit excellent electrochemical performances including large capacity, superior rate capability, high capacity retention, and high Coulombic efficiency. More importantly, this is the first implementation case of a reliable Mg–S system based on nucleophilic APC electrolytes.