Nano-Micro Letters

A High Capacity Ammonium Vanadate Cathode for Zinc-Ion Battery

Qifei Li1, Xianhong Rui1, 2, *, Dong Chen1, Yuezhan Feng3, Ni Xiao4, Liyong Gan5, Qi Zhang1, Yan Yu2, 6, 7, *, Shaoming Huang1, *

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Nano-Micro Lett. (2020) 12: 67

First Online: 04 March 2020 (Article)

DOI:10.1007/s40820-020-0401-y

*Corresponding author. E-mail: xhrui@gdut.edu.cn (X.H. Rui); yanyumse@ustc.edu.cn (Y. Yu); smhuang@gdut.edu.cn (S.M. Huang)

 

Abstract

 


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Given the advantages of being abundant in resources, environmental benign and highly safe, rechargeable zinc-ion batteries (ZIBs) enter the global spotlight for their potential utilization in large-scale energy storage. Despite their preliminary success, zinc-ion storage that is able to deliver capacity >400 mAh g-1 remains a great challenge. Here, we demonstrate the viability of NH4V4O10 (NVO) as high capacity cathode that breaks through the bottleneck of ZIBs in limited capacity. The first-principles calculations reveal that layered NVO is a good host to provide fast Zn2+ ions diffusion channel along its [010] direction in the interlayer space. On the other hand, to further enhance Zn2+ ion intercalation kinetics and long-term cycling stability, a three-dimensional (3D) flower-like architecture that is self-assembled by NVO nanobelts (3D-NVO) is rationally designed and fabricated through a microwave-assisted hydrothermal method. As a result, such 3D-NVO cathode possesses high capacity (485 mAh g-1), and superior long-term cycling performance (3,000 times) at 10 A g-1 (~50 s to full discharge/charge). Additionally, based on the excellent 3D-NVO cathode, a quasi-solid-state ZIB with capacity of 378 mAh g-1 is developed.


 

Keywords

Zinc-ion battery; Cathode material; Ammonium vanadate; NH4V4O10; High capacity

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