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Interfacially Polymerized Polyamide Interlayer onto Ozonated Carbon Nanotube Networks for Improved Stability of Sulfur Cathodes
Author(s) -
Rana Harpalsinh H.,
Jana Milan,
Yeon Jeong Seok,
Park Jeong Hee,
Qing Liu,
Park Ho Seok
Publication year - 2020
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.201902236
Subject(s) - cathode , faraday efficiency , chemical engineering , materials science , carbon nanotube , sulfur , polyamide , dissolution , polymerization , electrode , carbon fibers , lithium (medication) , anode , nanotechnology , polymer , chemistry , polymer chemistry , composite material , composite number , metallurgy , engineering , medicine , endocrinology
Lithium–sulfur (Li–S) batteries are considered promising energy‐storage devices owing to the high specific capacity and low cost of the S cathode. However, they suffer from capacity decay and poor coulombic efficiency arising from the dissolution of long‐chain polysulfides and their shuttling. A facile and scalable method was developed to directly coat a thin (≈57.3 nm) and porous polyamide (PA) interlayer onto a S cathode by interfacial polymerization. This PA interlayer prevented the shuttling of polysulfides by creating a physical barrier and, through chemical interactions between the amide functionalities of PA and the polysulfides, allowing access to the S electrode by the Li ions. The resulting PA‐coated cathode exhibited approximately 64.2 % capacity retention over 1000 cycles at 1 C with only 0.0358 % decay per cycle and a moderate capacity of 1008 mAh g −1 at 0.1 C.