Microdefects evolution and electrochemical performance modulation of Mn doped VO2(B) nanorods

Liu, Dewei; Zhang, Qijie; Ding, Saipeng; Yan, Fufeng; Hirata, Dai; Li, Tao; Xue, Rongjian; Chen, Jing; Gong, Gaoshang; Shang, Cui; Zhai, Xuezhen

doi:10.1016/j.jallcom.2022.164975

Cited by 9 publications

(1 citation statement)

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“…It has been reported that a Co 0.16 Zn 0.09 V 2 O 5 •nH 2 O electrode exhibits an initial capacity of 90 mAh•g −1 at 3.0 A•g −1 , and the capacitance retention is 97% after 1000 cycles [15]. In our previous study, Mn ion-doped VO 2 (B) was used as the electrode of aqueous metal-ion batteries with enhanced electrochemical performance [16]. It is still necessary, however, to verify the mechanism behind the enhancement of stability and cyclability by the metal cation doping process for aqueous metal-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Modulation of Zn Doped VO2(B) Nanorods with Improved Electrochemical Properties towards High Performance Aqueous Batteries

et al. 2022

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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.

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Section: Introductionmentioning

confidence: 99%