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Constructing Binder‐ and Carbon Additive‐Free Organosulfur Cathodes Based on Conducting Thiol‐Polymers through Electropolymerization for Lithium‐Sulfur Batteries
Author(s) -
Ning Jiaoyi,
Yu Hongtao,
Mei Shilin,
Schütze Yannik,
Risse Sebastian,
Kardjilov Nikolay,
Hilger André,
Manke Ingo,
Bande Annika,
Ruiz Victor G.,
Dzubiella Joachim,
Meng Hong,
Lu Yan
Publication year - 2022
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202200434
Subject(s) - organosulfur compounds , thiol , sulfur , lithium (medication) , conductive polymer , carbon fibers , polymer , cathode , materials science , chemistry , lithium–sulfur battery , organic chemistry , electrochemistry , polymer chemistry , electrode , composite material , medicine , composite number , endocrinology
Herein, the concept of constructing binder‐ and carbon additive‐free organosulfur cathode was proved based on thiol‐containing conducting polymer poly(4‐(thiophene‐3‐yl) benzenethiol) (PTBT). The PTBT featured the polythiophene‐structure main chain as a highly conducting framework and the benzenethiol side chain to copolymerize with sulfur and form a crosslinked organosulfur polymer (namely S/PTBT). Meanwhile, it could be in‐situ deposited on the current collector by electro‐polymerization, making it a binder‐free and free‐standing cathode for Li‐S batteries. The S/PTBT cathode exhibited a reversible capacity of around 870 mAh g −1 at 0.1 C and improved cycling performance compared to the physically mixed cathode (namely S&PTBT). This multifunction cathode eliminated the influence of the additives (carbon/binder), making it suitable to be applied as a model electrode for operando analysis. Operando X‐ray imaging revealed the remarkable effect in the suppression of polysulfides shuttle via introducing covalent bonds, paving the way for the study of the intrinsic mechanisms in Li‐S batteries.