Preparation and electrochemical performance of VO2(A) hollow spheres as a cathode for aqueous zinc ion batteries. Issue 60 (30th October 2019)

• Record Type: Journal Article
• Authors: Li, Runxia; Yu, Xin; Bian, Xiaofei; Hu, Fang
• Is Part Of: RSC advances. Volume 9:Issue 60(2019)
• Page Start: 35117
• Page End: 35123
• Publication Date: 2019-10-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra07340j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : VO2 (A) hollow spheres exhibit superior zinc ion storage performance, large reversible capacity of 357 mA h g −1 at 0.1 A g −1, and good cycling stability with a capacity retention of 76% over 500 cycles at 5 A g −1 Abstract : Rechargeable aqueous zinc ion batteries (ZIBs), owing to their low-cost zinc metal, high safety and nontoxic aqueous electrolyte, have the potential to accelerate the development of large-scale energy storage applications. However, the desired development is significantly restricted by cathode materials, which are hampered by the intense charge repulsion of bivalent Zn 2+ . Herein, the as-prepared VO2 (A) hollow spheres via a feasible hydrothermal reaction exhibit superior zinc ion storage performance, large reversible capacity of 357 mA h g −1 at 0.1 A g −1, high rate capability of 165 mA h g −1 at 10 A g −1 and good cycling stability with a capacity retention of 76% over 500 cycles at 5 A g −1 . Our study not only provides the possibility of the practical application of ZIBs, but also brings a new prospect of designing high-performance cathode materials.