Self-supported MoO2/MoS2 nano-sheets embedded in a carbon cloth as a binder-free substrate for high-energy lithium–sulfur batteries

Tang, Yanqing; Huang, Yun; Luo, Liu; Fan, Donglei (Emma); Lu, Yangcheng; Manthiram, Arumugam

doi:10.1016/j.electacta.2020.137482

Title: Self-supported MoO₂/MoS₂ nano-sheets embedded in a carbon cloth as a binder-free substrate for high-energy lithium–sulfur batteries

Journal Article · Mon Nov 16 00:00:00 EST 2020 · Electrochimica Acta

DOI:https://doi.org/10.1016/j.electacta.2020.137482· OSTI ID:1850925

Tang, Yanqing ^[1];

^[2]; Luo, Liu ^[2]; Fan, Donglei (Emma) ^[2]; Lu, Yangcheng ^[3];

^[2]

Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program. Texas Materials Inst.; Tsinghua Univ., Beijing (China). Dept. of Chemical Engineering. State Key Lab. of Chemical Engineering
Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program. Texas Materials Inst.
Tsinghua Univ., Beijing (China). Dept. of Chemical Engineering. State Key Lab. of Chemical Engineering

As one of the most prospective candidates for next-generation rechargeable batteries, lithium-sulfur (Li-S) batteries currently still encounter great challenges associated with the low conductivity, severe shuttle effects, and sluggish redox kinetics. Herein, a self-supported sulfur host is fabricated by an in-situ growth of MoO₂/MoS₂ nano-sheets on a carbon cloth (CC). First, carbon cloth serves as a good template for the morphology-controlled synthesis of nanostructured materials, which not only alleviates the agglomeration of MoO2/MoS2, but also enhances the flexibility and mechanical strengthen of the hybrid architecture as a free-standing host. Second, the polysulfide-trapping ability can be greatly enhanced by both physical and chemical adsorption from the MoO₂/MoS₂-anchored carbon cloth. Moreover, the partially sulfurized MoO₂/MoS₂ nano-sheets integrate the benefits of conductive MoO₂ and sulfiphilic MoS₂, thus facilitating fast charge transfer and redox kinetics of polysulfide conversion. As a result, these attributes enable the host to hold a high sulfur loading (up to 7.6 mg cm^-2), which exceeds most of the reported carbon cloth-related cathode work in the literature. Furthermore, the Li-S cells can achieve a high peak capacity of 1350 mA h g^-1, excellent rate capability (C/20 - 2C rate), impressive areal capacity (up to 6.3 mA h cm^-2), and a high capacity retention of 85% after 100 cycles.

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Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0005397

OSTI ID:: 1850925

Alternate ID(s):: OSTI ID: 1775747

Journal Information:: Electrochimica Acta, Vol. 367, Issue C; ISSN 0013-4686

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Self-supported MoO2/MoS2 nano-sheets embedded in a carbon cloth as a binder-free substrate for high-energy lithium–sulfur batteries

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Title: Self-supported MoO₂/MoS₂ nano-sheets embedded in a carbon cloth as a binder-free substrate for high-energy lithium–sulfur batteries