Bifunctional Separator with Ultra-Lightweight MnO 2 Coating for Highly Stable Lithium-Sulfur Batteries.

Autor:	Tian YW; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Zhang YJ; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Wu L; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Dong WD; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Huang R; Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, Wuhan Institute of Technology, 206 Guanggu 1st Road, Wuhan430205, China., Dong PY; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Yan M; Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, Wuhan Institute of Technology, 206 Guanggu 1st Road, Wuhan430205, China., Liu J; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Mohamed HSH; Physics Department, Faculty of Science, Fayoum University, El Gomhoria Street, Fayoum63514, Egypt., Chen LH; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Li Y; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China., Su BL; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan430070, Hubei, China.; Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, 61 Rue de Bruxelles, NamurB-5000, Belgium.
Jazyk:	angličtina
Zdroj:	ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2023 Feb 08; Vol. 15 (5), pp. 6877-6887. Date of Electronic Publication: 2023 Jan 27.
DOI:	10.1021/acsami.2c20461
Abstrakt:	The severe shuttling behavior in the discharging-charging process largely hampers the commercialization of lithium-sulfur (Li-S) batteries. Herein, we design a bifunctional separator with an ultra-lightweight MnO 2 coating to establish strong chemical adsorption barriers for shuttling effect alleviation. The double-sided polar MnO 2 layers not only trap the lithium polysulfides through extraordinary chemical bonding but also ensure the uniform Li + flux on the lithium anode and inhibit the side reaction, resulting in homogeneous plating and stripping to avoid corrosion of the Li anode. Consequently, the assembled Li-S battery with the MnO 2 -modified separator retains a capacity of 665 mA h g -1 at 1 C after 1000 cycles at the areal sulfur loading of 2.5 mg cm -2 , corresponding to only 0.028% capacity decay per cycle. Notably, the areal loading of ultra-lightweight MnO 2 coating is as low as 0.007 mg cm -2 , facilitating the achievement of a high energy density of Li-S batteries. This work reveals that the polar metal oxide-modified separator can effectively inhibit the shuttle effect and protect the Li anode for high-performance Li-S batteries.
Databáze:	MEDLINE
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