Heterostructure VO_(2)@VS_(2) tailored by one-step hydrothermal synthesis for stable and highly efficient Zn-ion storage  

作　　者：Enyan Zhao Kesheng Gao Xuan Luo Lin Li Jinkui Zhao Hongliang Li 

机构地区：[1]College of Materials Science and Engineering,Qingdao University,Qingdao 266071,People’s Republic of China [2]Songshan Lake Materials Laboratory,Dongguan 523808,People’s Republic of China [3]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,People’s Republic of China [4]School of Physical Sciences,Great Bay University,Dongguan 523808,People’s Republic of China

出　　处：《Materials Futures》2024年第4期171-180,共10页材料展望（英文）

基　　金：supported by the College Students’Innovation and Entrepreneurship Training Program of Qingdao University(Grant No.X2023110650038);Guangdong Basic and Applied Basic Research Foundation(Grant No.2023B1515120003).

摘　　要：The increasing demand for advanced energy storage solutions has driven extensive research into Zn-ion batteries due to their safety,cost-effectiveness,and environmental compatibility.This study presents a synthesis and evaluation of VO_(2)@VS_(2) hollow nanospheres as a novel cathode material for Zn-ion batteries.The VO_(2)@VS_(2) composite,synthesized via a one-step hydrothermal method,demonstrates a significant improvement in electrochemical performance.The material exhibits a reversible capacity of 468 mAh g^(-1) at 0.1 A g^(-1) and maintains a high capacity of 237 mAh g^(-1) at 1.0 A g^(-1) over 1000 cycles with a retention rate of 85%.Electrochemical analyses reveal enhanced charge transfer and Zn-ion storage,attributed to the synergistic effect and built-in electric field of the VO2 and VS2 heterostructure.Additionally,the composite shows superior electrochemical kinetics,facilitating rapid ion transport and charge transfer.In-situ Raman analysis confirms the reversible Zn-ion storage mechanism,further validating the composite’s structural stability during cycling.Density functional theory calculations further support these findings,indicating the composite’s potential for high-rate capability and long-term cycling stability.This research highlights the promise of VO_(2)@VS_(2) hollow nanospheres in advancing the performance of aqueous Zn-ion batteries.

关 键 词：Zn-ion batteries vanadium-based cathode hollow nanospheres HETEROSTRUCTURE PSEUDOCAPACITIVE 

分 类 号：TM910.4[电气工程—电力电子与电力传动]