Issue 31, 2017, Issue in Progress
From the journal:

RSC Advances

Improved lithium-ion and electrically conductive sulfur cathode for all-solid-state lithium–sulfur batteries

Cheng Zhang,a   Yue Lin,a   Yuewu Zhu,a   Zhi Zhanga  and  Jin Liu ORCID logo *a  

* Corresponding authors

a School of Metallurgy and Environment, Central South University, Changsha, China
E-mail: jinliu@csu.edu.cn

Abstract

The development of all-solid-state lithium–sulfur (Li–S) batteries is a promising way to solve the problems of sulfur dissolution and shuttling. Herein, a carbon matrix (GO–PEG) consisting of a lithium ion conductor (PEG) is synthesized by grafting PEG onto the surface of graphene oxide (GO) via an esterification reaction. Sulfur is in situ precipitated onto the surface of GO–PEG to form GO–PEG@C/S cathode materials in a one-pot reaction. The GO–PEG@C/S cathode materials show uniform distribution of sulfur nanoparticles on ionically and electrically conductive nanosheets. When the cathode is fabricated into an all-solid-state lithium–sulfur battery with a solid polymer electrolyte, the battery exhibits a high initial discharge capacity of 1225 mA h g−1 at 0.2C (80 °C) and good cycling stability with a capacity retention of 86.6% after 100 discharge–charge cycles at 2C and 80 °C. These results demonstrate that the introduction of a lithium ion conductor into the matrix skeleton of the sulfur cathode can enhance the comprehensive electrochemical properties of all-solid-state Li–S batteries.

Graphical abstract: Improved lithium-ion and electrically conductive sulfur cathode for all-solid-state lithium–sulfur batteries

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Article information

DOI
https://doi.org/10.1039/C7RA02174G
Article type
Paper
Submitted
21 Feb 2017
Accepted
21 Mar 2017
First published
31 Mar 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 19231-19236

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Improved lithium-ion and electrically conductive sulfur cathode for all-solid-state lithium–sulfur batteries

C. Zhang, Y. Lin, Y. Zhu, Z. Zhang and J. Liu, RSC Adv., 2017, 7, 19231 DOI: 10.1039/C7RA02174G

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