首页|Graphene-like ultrathin bismuth selenide nanosheets as highly stable anode material for sodium-ion battery
Graphene-like ultrathin bismuth selenide nanosheets as highly stable anode material for sodium-ion battery
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NSTL
Elsevier
Sodium-ion batteries have high potential for next-generation battery system because of their cost-effective and similar energy-storage mechanism to lithium-ion batteries. However, the commercial graphite anode for lithium-ion batteries cannot be applied to sodium-ion batteries. The lower rate performance and poor cycling life of existing anode materials are major bottlenecks to prospective application in sodium-ion batteries. To address this issues, we synthesize a novel ultrathin Bi2Se3 layered nanosheets that enhance sodium-ion storage performance due to its stable graphene-like structure. Benefiting from the layered nanosheets morphology, as-prepared anode material exhibit excellent electrochemical performance, which can deliver an initial high capacity of 650 mA h g?1 (Na+ storage) at 0.1 A/g along with outstanding stability. The ultrathin Bi2Se3 layered nanosheets with a thickness of ~6 nm offer a large electrode-electrolyte contact interface due to its porous morphology. Ex-situ transmission electron microscopy analysis and electrochemical impedance spectroscopy measurement reveals the structural stability of bismuth selenide nanosheets during repeated sodium-ion insertion and extraction process. The superior electrochemical performance and unique graphene-like architecture of the layered bismuth selenide nanosheets offer a promising anode for commercial sodium-ion batteries.
Energy storageGraphene-like structureNanosheetsPorous materialSodium-ion batteries
Ud Din M.A.、Jamil S.、Cheng N.、Irfan S.、Dar S.U.、Khan Q.U.、Saleem M.S.
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School of Materials and Energy Southwest University
School of Materials Science and Engineering Dongguan University of Technology
Department of Chemistry Guandong Technion Israel Institute of Technology
Key Laboratory of Optoelectronics Devices and Systems Ministry of Education and Guandong Province College of Physics and Optoelectronics Engineering Shenzhen University
EMPA Swiss Fedral Laborateries for Material Science and Technology
NSTL
Elsevier
