Electrochemical activation induced multi-valence variation of (NH4)2V4O9 as a high-performance cathode material for zinc-ion batteries. Issue 29 (16th March 2021)

• Record Type: Journal Article
• Authors: Gan, Zhiwei; Chen, Lineng; Xiong, Fangyu; Cai, Xinyin; Cui, Wenjun; Sang, Xiahan; An, Qinyou; Wu, Liming
• Is Part Of: Chemical communications. Volume 57:Issue 29(2021)
• Page Start: 3615
• Page End: 3618
• Publication Date: 2021-03-16
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d1cc00360g
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Electrochemical activation of (NH4 )2 V4 O9 has been found in the first charging process. After this activation, a high capacity (477 mA h g −1 at 50 mA g −1 ) and stable cycling life (97.7% retention after 5000 cycles at 15 A g −1 ) have been achieved. Abstract : In this paper, we found that (NH4 )2 V4 O9 undergoes an electrochemical activation process in the first charging process at ∼1.4 V ( vs. Zn 2+ /Zn), leading to a significant improvement of capacity and cycling stability. The activated vanadium oxides delivered a high specific capacity of 477 mA h g −1 at 50 mA g −1 and outstanding cycling stability with 97.7% capacity retention after 5000 cycles at 15 A g −1 .