首页|Constructing oxygen deficiency-rich V203@PEDOT cathode for high-performance aqueous zinc-ion batteries
Constructing oxygen deficiency-rich V203@PEDOT cathode for high-performance aqueous zinc-ion batteries
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Aqueous zinc-ion batteries(AZIBs)have attracted widespread attention due to the advantages of high safety and environmental friendliness.Although V2O3 is a promising cathode,the strong electrostatic interaction between Zn2+and V2O3 crystal,and the sluggish reaction kinetics still limit their application in AZIBs.Herein,the oxygen defects rich V2O3 with conducive poly(3,4-ethylenedioxythiophene)(PEDOT)shell(V2O3-Od@PE-DOT)was fabricated for AZIBs by combining the sulfur-assisted thermal reduction and in-situ polymerization method.The introduced oxygen vacancies of V2O3-Od@PEDOT weaken the electrostatic interaction between Zn2+and the host material,improving the interfacial electron transport,while the PEDOT coating enhances the structural stability and conductivity of V2O3,thus accel-erating the reaction kinetics.Based on the advantages,V2O3-Od@PEDOT electrode delivers a reversible capacity of 495 mAh·g-1 at 0.1 A·g-1,good rate capability(189 mAh·g-1 at 8.0 A·g-1),and an impressive cycling stability with 90.1％capacity retention over 1000 cycles at 8.0 A·g-1.The strategy may provide a path for exploiting the other materials for high performance AZIBs.
Dong-Fei Sun、Zi-Juan Wang、Tian Tian、Xin Yu、Dan-Dan Yu、Xiao-Zhong Zhou、Guo-Fu Ma、Zi-Qiang Lei
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Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education,Key Laboratory of Eco-environmental Polymer Materials of Gansu Province,School of College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China
国家自然科学基金Nature Science Foundation of Gansu Province
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