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Issue 22, 2019
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An acetylene black modified gel polymer electrolyte for high-performance lithium–sulfur batteries

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Abstract

Lithium–sulfur (Li–S) batteries are considered to be a promising energy storage system for the future. However, a series of problems, such as sulfur acting as an insulator, the shuttle effect and the growth of lithium dendrites, have hindered their commercial application. To simultaneously tackle these three challenges, a composite quasi-solid/gel polymer electrolyte consisting of a nonporous supporting layer made by lightly cross-linked PMMA and a coated acetylene black layer was prepared to realize high-performance Li–S batteries. The nonporous polymer membrane was used to efficiently suppress the growth of lithium dendrites and promote the formation of a stable solid electrolyte interphase, while the acetylene black layer facing the sulfur cathode can hinder the polysulfide diffusion and promote rapid electron transfer. The as-prepared lithium–sulfur batteries show good cycling stability for 200 cycles, with an initial specific capacity of 994.5 mA h g−1 at 1C and perfect rate performance with a reversible capacity of 657.5 mA h g−1 at 3C. The growth of lithium dendrites was also effectively suppressed. This work provides a new concept for the structural design of Li–S batteries and promises to promote the further commercialization of Li–S batteries.

Graphical abstract: An acetylene black modified gel polymer electrolyte for high-performance lithium–sulfur batteries

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Publication details

The article was received on 22 Mar 2019, accepted on 07 May 2019 and first published on 07 May 2019


Article type: Paper
DOI: 10.1039/C9TA03123E
J. Mater. Chem. A, 2019,7, 13679-13686

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    An acetylene black modified gel polymer electrolyte for high-performance lithium–sulfur batteries

    D. Yang, L. He, Y. Liu, W. Yan, S. Liang, Y. Zhu, L. Fu, Y. Chen and Y. Wu, J. Mater. Chem. A, 2019, 7, 13679
    DOI: 10.1039/C9TA03123E

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