Issue 9, 2023

Highly reversible Li/Li2S3 batteries with an advanced cathode structure

Abstract

In this work, a highly reversible Li/Li2S3 cell utilizing a self-weaving, free-standing nitrogen-doped carbon nanotube (NCNT) paper as an electrode is reported. The highly porous structure with a large surface area and the unique Li2Sx binding capability of the N functional groups make it possible for NCNTs to effectively reserve the polysulfides on the cathode electrode. At the same time, a second “protection net” was constructed in this work through coating nitrogen-doped graphene (NG) on one side of a commercial Celgard polypropylene (PP) separator to further impede the diffusion of polysulfides to the counter electrode. Our designed Li/Li2S3 cell can deliver a reversible discharge capacity approaching 1300 mA h g−1 at 0.2C. More interestingly, in a Li-free system using stainless steel as the counter electrode, the Li2S3 cathode still delivers 150 mA h g−1 discharge capacity. All the excellent performances suggest a potential route to develop highly reversible and high specific capacity lithium sulfur batteries.

Graphical abstract: Highly reversible Li/Li2S3 batteries with an advanced cathode structure

Supplementary files

Article information

Article type
Paper
Submitted
02 1月 2023
Accepted
20 3月 2023
First published
21 3月 2023

Sustainable Energy Fuels, 2023,7, 2074-2079

Highly reversible Li/Li2S3 batteries with an advanced cathode structure

Z. Wang, F. Ye, Z. Ma, Y. Jiang and M. Liu, Sustainable Energy Fuels, 2023, 7, 2074 DOI: 10.1039/D3SE00005B

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