期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 967, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.171807
关键词
Photoirradiation enhanced capacity behavior; Photocathode; Alkaline Zn battery
This paper investigates the improvement of electrochemical properties of NiCo2O4 using a light illumination method. The results show that the specific capacity of the NiCo2O4 electrode increases by 27% under light illumination, and an alkaline Zn battery with NiCo2O4 nanorod arrays as photocathode exhibits good performance.
NiCo2O4 has been widely applied in energy storage devices due to high theoretical capacity and excellent electronic conductivity. However, limited kinetics in redox reactions makes the specific capacity of NiCo2O4 much smaller than its theoretical value. In this paper, the electrochemical properties of NiCo2O4 are effectively improved with a light illumination method. The specific capacity (140.8 mA h g-1) of NiCo2O4 electrode under light is larger about-27 % than that in dark, indicating that NiCo2O4 electrode has remarkable photoirradiation enhanced capacity behavior. The reason for this behavior is that generated holes on the photoelectrode under light illumination can promote electrochemical reaction with OH-. In addition, an alkaline Zn battery with NiCo2O4 nanorod arrays as photocathode also shows good PIEC behavior. Under light illumination, this battery exhibits high specific capacity of 130.6 mA h g-1, large energy density of 220.7 Wh kg-1 and good cyclic stability. This work provides a new perspective for improving energy storage performance of semiconductor materials based electrochemical batteries.
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