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Author：

Zu, G. (Zu, G..) | Zhang, M. (Zhang, M..) | Liu, H. (Liu, H..) | Wang, J. (Wang, J..) | Li, Y. (Li, Y..) | Ke, X. (Ke, X..) | Cai, Y. (Cai, Y..) | Chen, X. (Chen, X..) | Li, N. (Li, N..) | Fu, Y. (Fu, Y..) | Tong, M. (Tong, M..) | Li, H. (Li, H..)

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Abstract：

WS2　is　an　attractive　anode　in　alkali　metal　ion　batteries　(AMIBs)　due　to　its　2D-layered　structure　and　high　theoretical　capacity.　However,　the　shuttle　effect　of　sulfur　and　the　spontaneous　growth　of　W　nanoparticles　are　key　issues　that　limit　the　alkali-ion　accommodation　ability.　Now,　it　is　still　a　great　challenge　to　achieve　in　situ　control　of　the　microstructure　evolution　paths　in　enclosed　batteries　for　extending　the　cycling　reversibility/lifespan.　Herein,　the　phase　conversion　paths　of　both　film-　and　powder-type　WS2　anodes　are　investigated　in　lithium-ion　batteries.　It　is　found　that　the　reversible　conversion　mechanism　is　beneficial　for　alleviating　the　shuttle　effect　through　strong　W-LixSy　bonding.　Also,　once　the　size　of　the　phase-converted　W/WS2　redox　pair　exceeds　∼10　nm　inside　the　anode　layer,　the　Li+　storage　ability　will　severely　decay　due　to　uncontrollable　W　precipitation.　To　maintain　high　reversibility,　amorphous　Al2O3　is　introduced　upon　pristine　WS2.　After　initializing　the　battery　test,　the　particle　size　of　the　W/WS2　redox　pair　is　in　situ　modulated　within　the　range　of　∼3-5　nm　because　of　the　refinement　effect　of　gradually　pulverized　Al2O3.　Thus,　the　decay　suppression　effect　lasting　over　750-1400　cycles　is　obtained　with　enhanced　W　↔　WS2　conversion　efficiency　and　good　capacity　retention.　This　is　expected　to　promote　the　optimization　of　Mo-group　sulfides/selenides/tellurides　toward　AMIBs.　©　2024　American　Chemical　Society.

Keyword：

phase conversion paths reversibility Al2O3 lithium-ion batteries WS2

Author Community：

  • [ 1 ] [Zu G.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 2 ] [Zhang M.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 3 ] [Liu H.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 4 ] [Wang J.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 5 ] [Li Y.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 6 ] [Wang J.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 7 ] [Ke X.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 8 ] [Cai Y.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 9 ] [Chen X.]School of Materials & Environmental Engineering, Shenzhen Polytechnic University, Guangdong, Shenzhen, 518055, China
  • [ 10 ] [Li N.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 11 ] [Fu Y.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 12 ] [Tong M.]Shaanxi Key Laboratory of Nanomaterials and Nanotechnology, Xi’an Key Laboratory of Clean Energy, School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi, Xi’an, 710055, China
  • [ 13 ] [Li H.]Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing Key Laboratory of Microstructure and Properties of Solids, College of Material Science and Engineering, Beijing University of Technology, Beijing, 100124, China

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Source ：

ACS Applied Materials and Interfaces

ISSN： 1944-8244

Year： 2024

9 . 5 0 0

JCR@2022

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 5

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