High-rate performance and super long-cycle stability of Na_(3)V_(2)(PO_(4))_(3)cathode material coated by diatomic doped carbon

作     者：Jia Kang Ling Zhu Fei-Yang Teng Si-Qi Wang Yong-Gang Huang Yan-Hong Xiang Zhe Chen Xian-Wen Wu Jia Kang;Ling Zhu;Fei-Yang Teng;Si-Qi Wang;Yong-Gang Huang;Yan-Hong Xiang;Zhe Chen;Xian-Wen Wu

作者机构：School of Physics and Electromechanical EngineeringJishou UniversityJishou416000China School of Chemistry and Chemical EngineeringJishou UniversityJishou416000China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第5期

页      面：1570-1582页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.11964010,11464014,51862008,52064014,52064013) the Natural Science Foundation of Hunan Province(No.2020JJ4495) the Youth Program of Hunan Provincial Education Department(No.21B0522) 

主　　题：Sodium ion battery(SIB) Cathode material Na_(3)V_(2)(PO_(4))_(3) Diatomic doping Carbon coating 

摘      要：Na_(3)V_(2)(PO_(4))_(3)is considered as one of the most promising cathodes for sodium ion batteries due to its excellent thermal stability,long cycle life and high energy ***,the inferior intrinsic electronic conductivity which brings about the poor rate capability and cycling performance hinders its commercial ***,the S-N co-doped carbon-coated Na_(3)V_(2)(PO_(4))_(3)(NVP@SNC)has been synthesized to resolve the *** prepared NVP@SNC forms a hierarchical structure assembled with nanosheets,which is in favor of the electrolyte infiltration and shortening the Na^(+)transmission *** lattice defects can be induced in carbon layer by the co-doped elements(S-N),which reduce the Na^(+)diffusion energy barriers and provide adequate Na^(+)migration channels,thus jointly boosting the Na^(+)diffusion ***,the NVP@SNC cathode shows a high reversible capacity with outstanding rate performance and super long-cycle *** discharged at 2.0C,it delivers the capacity near to the theoretical value with a capacity retention of 88.7%after *** if the current is as high as 50.0C,a high capacity of 58.6 mAh·g^(-1)has been released,and41.4 mAh·g^(-1)has been remained after the super long cycling of 4000 *** study is expected to supply a new thought of developing high-performance cathodes by diatomic doping for sodium ion battery.