Cationic polymer-grafted graphene oxide/CNT cathode-coating material for lithium-sulfur batteries.

ABSTRACT: A cathode-coating material composed of cationic polymer-grafted graphene oxide (CPGO) and carbon nanotube (CNT) was prepared, where the CPGO was synthesized by grafting quaternized 2-(dimethylamino)ethyl methacrylate (QDMAEMA) onto graphene oxide (GO) via atom transfer radical polymerization (ATRP). GO has good compatibility with carbon black, the main component of the cathode in lithium-sulfur (Li-S) batteries. Here, the cationic polymer having the QDMAEMA unit was intentionally grafted onto GO to decrease the shuttle effect by increasing the chemical adsorption of polysulfide (PS). In addition, when CNT was mixed with CPGO, the compatibility with carbon black was found to be further increased. The lithium-sulfur (Li-S) battery with a sulfur-deposited Super P® carbon black (S/C) ca

SUBMITTER: Jeong D 

PROVIDER: S-EPMC9036968 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature