首页|Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries
Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries
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Rechargeable aqueous zinc-ion batteries are promising candidate for grid-scale energy storage.However,the development of zinc-ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior lifespan.Herein,hexagonal Cs0.3V2O5 cathode is fabricated and investigated in zinc-ion batteries.Compared with the traditional vanadium oxides,the introduction of Cs changes the periodic atomic arrangements,which not only stabilizes the open framework structure but also facilitates the Zn2+diffusion with a lower migration energy barrier.Consequently,high specific capacity of 543.8 mA h g-1 at 0.1 A g-1 is achieved,which surpasses most of reported cathode materials in zinc-ion batteries.The excellent cycle life is achieved over 1000 cycles with about 87.8％capacity retention at 2 A g-1.Furthermore,the morphological evolution and energy storage mechanisms are also revealed via a series of techniques.This work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase-dependent cathodes in zinc-ion batteries.
Gan Qu、Kai Guo、Weijie Chen、Yu Du、Ye Wang、Bingbing Tian、Jianan Zhang
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Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City,College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen 518060,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaDistinguished Young Scholars Innovation Team of Zhengzhou UniversityYouth Talent Support Program of High-Level Talents Special Support Plan in Henan Province
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