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Type: Journal article
Title: 2D MoN-VN heterostructure to regulate polysulfides for highly efficient lithium-sulfur batteries
Author: Ye, C.
Jiao, Y.
Jin, H.
Slattery, A.
Davey, K.
Wang, H.
Qiao, S.
Citation: Angewandte Chemie International Edition, 2018; 57(51):16703-16707
Publisher: Wiley
Issue Date: 2018
ISSN: 1433-7851
Statement of
Chao Ye, Yan Jiao, Huanyu Jin, Ashley D. Slattery, Kenneth Davey, Haihui Wang and Shi-Zhang Qiao
Abstract: Lithium-sulfur batteries hold promise for next-generation batteries. A problem however is rapid capacity fading. Moreover, atomic-level understanding of the chemical interaction between sulfur host and polysulfides is poorly elucidated from a theoretical perspective. Here, a two-dimensional (2D) heterostructured MoN-VN is fabricated and investigated as a new model sulfur host. Theoretical calculations indicate that electronic structure of MoN can be tailored by incorporation of V. This leads to enhanced polysulfides adsorption. Additionally, in situ synchrotron X-ray Diffraction and electrochemical measurements reveal effective regulation and utilization of the polysulfides in the MoN-VN. The MoN-VN-based lithium-sulfur batteries have a capacity of 708 mA h g⁻¹ at 2 C and a capacity decay as low as 0.068% per cycle during 500 cycles with sulfur loading of 3.0 mg cm⁻².
Keywords: Heterostructure; lithium-sulfur batteries; sulfur host materials; two-dimensional materials
Rights: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
RMID: 0030100495
DOI: 10.1002/anie.201810579
Grant ID:
Appears in Collections:Chemical Engineering publications

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