V_(2)O_(3)/VO_(2)@S/N-C nanofibers with excellent cycling stability and superior rate capability in aqueous zinc ion batteries  

作　　者：Li Chen Zhi Chen Zhaohui Wu Haijun Zeng Yabing Chen Huiyong Yang Wentao Qian Juntong Huang 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China

出　　处：《Journal of Energy Chemistry》2024年第12期83-91,共9页能源化学（英文版）

基　　金：financially supported by the Natural Science Foundation of China (Grant No. 52272063);the Jiangxi Provincial Natural Science Foundation (No. 20224BAB214037, 20232BAB204022, 20232BAB204019)。

摘　　要：The development of aqueous zinc-ion batteries (AZIBs) marks a significant advancement in the field of sustainable and environmentally friendly energy storage.To address the challenges faced by singlephase vanadium-based oxides,such as poor conductivity and dissolution in electrolytes,this study introduces vacuum S/N doping to fabricate V_(2)O_(3)/VO_(2)@S/N-C nanofibers,improving the cycling stability and enhancing the capacity.The V_(2)O_(3)/VO_(2)@S/N-C electrode exhibits exceptional cyclic stability,retaining a capacity of 133.3 m A h g^(-1)after 30,000 cycles at a high current density of 100 A g^(-1)and a capacity retention of 81.8%after 150,000 cycles at 200 A g^(-1).Characterizations using ex-situ X-ray diffraction and ex-situ X-ray photoelectron spectroscopy reveal co-intercalation of H^(+)and Zn^(2+)in the V_(2)O_(3)/VO_(2)@S/N-C electrode.Due to the presence of S_(2)^(2-),more phases changed to V_(10)O_(24).12H_(2)O,making the V_(2)O_(3)/VO_(2)@S/N-C electrode better reversible.By elucidating the zinc storage mechanism and demonstrating the stable performance of the doped electrode,this work contributes valuable insights into the optimization of the electrode materials for future energy storage solutions.

关 键 词：S/N co-doping Biphasic mixed valence vanadium oxides Aqueous zinc-ion battery V_(10)O_(24)·12H_(2)O 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ343[化学工程—化纤工业] TM912[电气工程—电力电子与电力传动]