热液循环
阴极
水热合成
水溶液
材料科学
电解质
电化学
钒
储能
扩散
化学工程
纳米技术
化学
电极
冶金
物理化学
工程类
功率(物理)
物理
热力学
量子力学
作者
Xiaodong Liu,Chunyang Liu,Zhiqiang Wang,Hongming Chen,Zijin Liu,Jiaqi Yang,Woon‐Ming Lau,Dan Zhou
标识
DOI:10.1016/j.jallcom.2021.163071
摘要
Aqueous zinc-ion batteries (AZIBs) are now vigorously explored as a class of novel and competitive candidates for large-scale energy storage in terms of high safety, eco-friendliness and low cost. In order to realize efficient Zn-storage with desirable cycling stability and rate capability, constructing suitable cathode materials that possess reliable host structure and fast Zn2+ diffusion kinetics makes a lot of sense. Herein, novel V2O5 nanofibers were facilely synthesized via a hydrothermal method and employed as a cathode material for AZIBs. By matching with aqueous Zn(CF3SO3)2 electrolyte, the cathode is able to achieve a specific capacity as high as 264.5 mAh g−1 at 200 mA g−1. Even conducted at a large current density of 2000 mA g−1, a considerable rate capability of 132.6 mAh g−1 can also be delivered. In addition, electrochemical reaction kinetics and ion diffusion mechanism were initially conducted to uncover the insights for efficient Zn-storage. This work is anticipated to offer feasible strategy for the design and fabrication of promising vanadium-based cathode materials for rechargeable AZIBs.
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