2D MoN-VN heterostructure to regulate polysulfides for highly efficient lithium-sulfur batteries
Date
2018
Authors
Ye, C.
Jiao, Y.
Jin, H.
Slattery, A.
Davey, K.
Wang, H.
Qiao, S.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Angewandte Chemie International Edition, 2018; 57(51):16703-16707
Statement of Responsibility
Chao Ye, Yan Jiao, Huanyu Jin, Ashley D. Slattery, Kenneth Davey, Haihui Wang and Shi-Zhang Qiao
Conference Name
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.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim