Microstructure Modulation of Zn Doped VO<sub>2</sub>(B) Nanorods with Improved Electrochemical Properties towards High Performance Aqueous Batteries
Dewei Liu,
Qijie Zhang,
Xiaohong Chen,
Haiyang Dai,
Xuezhen Zhai,
Jing Chen,
Gaoshang Gong,
Cui Shang,
Xuzhe Wang
Affiliations
Dewei Liu
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Qijie Zhang
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Xiaohong Chen
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Haiyang Dai
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Xuezhen Zhai
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Jing Chen
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Gaoshang Gong
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Cui Shang
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Xuzhe Wang
Laboratory of Magnetoelectronic Information, School of Physics and Electronic Engineering, Henan Key Functional Materials, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Vanadium dioxide with monoclinic structure is theoretically a promising layered cathode material for aqueous metal-ion batteries due to its excellent specific capacity. However, its poor cycling stability limits its application as an electrode material. In this study, a series of Zn-doped VO2 (V1−xZnxO2) nanorods were successfully fabricated by the technology of one-step hydrothermal synthesis. The XRD result indicated that there was a slight lattice distortion caused by doped Zn2+ with a larger ion radius. The positron lifetime spectrum showed that there were vacancy cluster defects in all the samples. The electrochemical measurement demonstrated the enhancement of the specific capacitance of V1−xZnxO2 electrodes compared with the undoped sample. In addition, the discharge capacitance of the sample remained around 86% after 1000 charge/discharge cycles. This work proves that Zn2+ doping is a valid tactic for the application of nano-VO2(B) in energy storage electrode materials.
