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Binder-free electrode architecture design for lithium-sulfur batteries: A review

Abstract

Lithium-sulfur batteries (LSBs) are considered to be one of the most promising next-generation electrochemical power sources to replace commercial lithium-ion batteries because of their high energy density. However, practical application of LSBs is hindered by two critical drawbacks: “redox shuttle reactions” of dissolved polysulfides at the cathode side and Li dendrites at the Li anode side. Therefore, various approaches have been proposed to break down technical barriers in LSB systems. The overall device performance of LSBs depends on not only the development of host materials but also the superior architectures design of electrodes. Among these architectures, binder-free electrodes are verified to be one of the most effective structure designs for high-performance LSBs. Therefore, it is urgent to review recent advances in binder-free electrodes for promoting the fundamental and technical advancements of LSBs. Herein, recently emergent works of using various binder-free architectures in sulfur cathodes and lithium metal anodes are reviewed. These binder-free electrodes, with well-interconnected structure and abundant structural space, can provide a continuous pathway for endowing the fast/uniform electron transport/distribution, load sufficient active materials for ensuring high energy density, and afford large electrochemically active surface area where electron and Li ions can meet with the active materials for fast conversion reactions, thus leading to suitable application for LSBs. Subsequently, the advantages and challenges of binder-free architectures are discussed in several recently emerged works using binder-free structured sulfur cathode or Li metal anode. The future prospects of LSBs with binder-free electrode structures design are also discussed.

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Publication details

The article was received on 22 Jan 2019, accepted on 24 Apr 2019 and first published on 25 Apr 2019


Article type: Review Article
DOI: 10.1039/C9NA00040B
Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Binder-free electrode architecture design for lithium-sulfur batteries: A review

    J. Guo and J. Liu, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C9NA00040B

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