Electrochemical activation induced multi-valence variation of (NH4)2V4O9 as a high-performance cathode material for zinc-ion batteries

Zhiwei Gan; Lineng Chen; Fangyu Xiong; Xinyin Cai; Wenjun Cui; Xiahan Sang; Qinyou An; Liming Wu

doi:10.1039/d1cc00360g

Electrochemical activation induced multi-valence variation of (NH₄)₂V₄O₉ as a high-performance cathode material for zinc-ion batteries

Chem Commun (Camb). 2021 Apr 14;57(29):3615-3618. doi: 10.1039/d1cc00360g. Epub 2021 Mar 16.

Authors

Zhiwei Gan¹, Lineng Chen, Fangyu Xiong, Xinyin Cai, Wenjun Cui, Xiahan Sang, Qinyou An, Liming Wu

Affiliation

¹ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China. anqinyou86@whut.edu.cn liming_wu@whut.edu.cn.

PMID: 33724281
DOI: 10.1039/d1cc00360g

Abstract

In this paper, we found that (NH₄)₂V₄O₉ undergoes an electrochemical activation process in the first charging process at ∼1.4 V (vs. Zn²⁺/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.