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Leakage‐Proof Electrolyte Chemistry for a High‐Performance Lithium–Sulfur Battery
Author(s) -
Ju Jiangwei,
Dong Shanmu,
Cui Yanyan,
Zhang Yanfen,
Tang Ben,
Jiang Feng,
Cui Zili,
Zhang Huanrui,
Du Xiaofan,
Lu Tao,
Huang Lang,
Cui Guanglei,
Chen Liquan
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202103209
Subject(s) - polysulfide , electrolyte , dimethoxyethane , leakage (economics) , chemistry , battery (electricity) , self discharge , materials science , lithium–sulfur battery , chemical engineering , inorganic chemistry , engineering , power (physics) , physics , electrode , quantum mechanics , economics , macroeconomics
Abstract Electrolyte leakage is a severe safety concern in lithium batteries. With highly volatile 1,2‐dimethoxyethane as solvent, the leakage related hazards are more pronounced in lithium‐sulfur (Li‐S) batteries. To address this concern, a leakage‐proof electrolyte is delicately designed through functionalizing the commercial electrolyte by Li 6 PS 5 Cl‐grafted poly(ethyl cyanoacrylate), which can interact readily with the aluminum‐plastic packing through hydrogen bond to immobilize the electrolyte. The moisture from ambient can also catalyze a further polymerization of the macromolecules to seal the leaking points and thereby to solve the leakage issue, endowing Li‐S batteries superior safety even in an artificial cut pouch cell. With a bare S loading of 4.9 mg cm −2 , the battery can deliver good endurance owing to the suppressed polysulfide shuttle by its polar groups. This work enlightens the design of leakage‐proof electrolyte and makes a milestone for high performance Li‐S batteries.