Three-dimensional nanostructured Co_(2)VO_(4)-decorated carbon nanotubes for sodium-ion battery anode materials  

作　　者：Yi Zhang Zhen Zhang Sheng Yu Hannah M.Johnson De-Cheng Zhao Su-Chong Tan Zheng-Dao Pan Zhou-Lu Wang Yu-Tong Wu Xiang Liu 

机构地区：[1]School of Energy Sciences and Engineering,Nanjing Tech University,Nanjing 211816,China [2]Department of Chemistry,Washington State University,Pullman 99164,USA

出　　处：《Rare Metals》2023年第12期4060-4069,共10页稀有金属（英文版）

基　　金：financially supported by the National Key Research and Development Project (No.2018YFE0124800);the National Nature Science Foundation of China (No.51702157)。

摘　　要：Since Co_(2)VO_(4) possesses a solid spinel structure and a high degree of stability,it has gained interest as a possible anode material for sodium-ion batteries.However,the application of this electrode material is still hampered by its poor electrical conductivity and severe volume expansion.Uniform Co_(2)VO_(4) nanoparticles(CVO)were grown on carbon nanotubes(CNTs)by a simple solvothermal method to form string-like conductive networks(CVO/CNTs).The flexible and highly conductive three-dimensional(3D)carbon nano tubes and small-sized CVO NPs can enhance the rapid transport of electrons,thereby enhancing the conductivity of the composite.String-like conductive network structures have a larger specific surface area,enhancing electron/ion transmission by fully contacting the electrolyte.The findings demonstrate the superior Na^(+)storing capability of the CVO/CNTs composite.The battery has a great rate performance(148.2 mAh·g^(-1)at 5 A·g^(-1))and outstanding long-term cycling performance(147.3 mAh·g^(-1)after 1000 cycles at 1A·g^(-1)).In high-rate,long-cycle sodium-ion batteries,CVO/CNTs composites offer a wide range of possible applications.

关 键 词：Sodium-ion batteries(SIBs) Co_(2)VO_(4) Carbon nanotubes(CNTs) Anode Long-cycle 

分 类 号：TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]