Freestanding strontium vanadate/carbon nanotube films for long-life aqueous zinc-ion batteries

查看全文 作　　者：Ye-Hong [1]Du;Xian-Yu [3]Liu;Xin-Yu [1]Wang;Jun-Cai [2]Sun;Qiong-Qiong [3]Lu;Jian-Zhi [4]Wang;Ahmad [3]Omar;Daria [3]Mikhailova

机构地区：[1]Institute of Materials and Technology,Dalian Maritime University,Dalian 116026,China e-mail:wangxinyu@dlmu.edu.cn;[2]School of Chemistry and Chemical Engineering,Lanzhou City University,Lanzhou 730070,China;[3]Leibniz Institute for Solid State and Materials Research(IFW)Dresden E.V,Helmholtzstraße 20,01069 Dresden,Germany e-mail:q.lu@ifw-dresden.de;[4]Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China

出　　处：《Rare Metals》索引2022年第41卷第2期,共10页

基　　金：This study was financially supported by the National Natural Science Foundation of China(No 21905037);the Doctoral Research Startup Fund of Liaoning Province(No.2020-BS-066);the Doctoral Research Fund of Lanzhou City University(No.LZCU-BS2020-03);the Fundamental Research Funds for the Central Universities(No.3132019328);Q.L.acknowledges the financial support from China Scholarship Council(CSC). 摘　　要：Aqueous rechargeable zinc-ion battery(ZIB)is considered to be a potential energy storage system for large-scale applications due to its environmental friendliness,high safety,and low cost.However,it remains challenging to develop suitable cathode materials with high specific capacity and long-term cyclic stability.Herein,we have fabricated freestanding Sr0.19V2O51.3H2O/carbon nanotubes(SrVO/CNTs)composite films with different mass ratios by incorporating SrVO into CNTs network.The synthesized SrVO possesses a large interlayer spacing of 1.31 nm,which facilitates Zn(2+)diffusion.Furthermore,the SrVO/CNTs composite film with conductive network structure promotes electron transfer and ensures good contact between SrVO and CNTs during the long-term cycling process.As a result,the battery based on the SrVO/CNTs composite cathode with a mass ratio of 7:3 delivers a specific capacity of 326 mAh·g^(-1)at 0.1 A·g^(-1)and 145 mAh·g^(-1)at 5 A·g^(-1),demonstrating a high capacity and excellent rate capability.Remarkably,the assembled ZIB shows good capacity retention of 91%even after ultra-long cycling for 7500 cycles at a high current rate of 5 Ag^(-1).More importantly,the battery also delivers a high energy density and power density,as 290 Wh·kg^(-1)at 125 W·kg^(-1)(0.1 A·g^(-1)),or 115 Wh·kg^(-1)at 6078 W·kg^(-1)(5 Ag^(-1)).The results demonstrate that the SrVO/CNTs composite is a promising cathode toward large-scale energy storage applications. 关键词：Aqueous zinc-ion battery Strontium vanadate Carbon nanotubes network Freestanding composite film Long cycle life

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Freestanding strontium vanadate/carbon nanotube films for long-life aqueous zinc-ion batteries

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