期刊
JOURNAL OF POWER SOURCES
卷 507, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.230286
关键词
Energy storage; Vanadium nitrogen; Cathode materials; Electrochemical performance
资金
- Natural Science Foundation of Hunan Province [2020JJ4734]
By modifying the electrode with graphene oxide, the study showed improved cycle stability and performance of the battery. Additionally, graphene oxide was found to accelerate redox reactions and enhance pseudocapacitive properties of the electrode, resulting in improved electron transport rate.
Aqueous zinc ion batteries (ZIBs) have the advantages of environmental friendliness, high safety and high energy density. In this work, we modify the industrial vanadium nitride (VN) with the high conductivity of realized graphene oxide (rGO), and the VN@rGO electrode has high rate capability and long cycle stability. Through the charge-discharge test, VN@rGO has 267.0 mA h g(-1) specific capacity and 94.68% capacity retention rate at 1 A g(-1) current density after 585 cycles, and 125.6 mA h g(-1) specific capacity and 91.24% capacity retention rate at 20 A g(-1) current density after 10,900 cycles. Through kinetic study, rGO can accelerate the redox reaction on the electrode surface and improve the electrode pseudocapacitive by accelerating the electron transport. Through ex situ characterization, VN will convert to V5O12 center dot 6H(2)O in the first charge, and the electrode activation process is creating holes in the electrode surface by deposition/dissolution of Zn4SO4(OH)(6)center dot 5H(2)O. The VN@rGO electrode can provide 69.28-246.5 W h kg(-1) energy density and 78.16-10938.95 W kg(-1) power density, which can drive light emitting diode and motors, and have good practicality.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据