Effect of synthesizing temperature on the electrochemical properties of nitrogen-doped Co-B alloys

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Liao, Y.L.^1 ; Zhao, W.^1 ; Qiu, S.J.^1 ; Chu, H.L.^1 ; Zou, Y.J.^1 ; Xiang, C.L.^1 ; Zhang, H.Z.^1 ; Xu, F.^1 ; Sun, L.X.^1

Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Centre of Structure and Property for New Energy and Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin

541004, China^1

关键词: Alkaline secondary batteries;    Chemical reduction methods;    Discharge specific capacity;    Electrochemical performance;    Galvanostatic charge discharges;    Initial discharge capacities;    Negative electrode material;    Synthesizing temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012035/pdf
DOI  :  10.1088/1757-899X/292/1/012035

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Using urea as nitrogen source, nitrogen-doped Co-B alloys were prepared by chemical reduction method at different reaction temperatures (25, 50, and 75 °C). The structure and surface morphology were characterized by XRD and SEM. Then they were used as negative electrode materials for alkaline secondary batteries (ASBs). The electrochemical properties were measured by galvanostatic charge-discharge, electrochemical impedance spectroscopy (EIS), and anodic polarization (AP). The experimental results show that the lower the synthesizing temperature is, the better the electrochemical performance of nitrogen-doped Co-B alloy is. For example, nitrogen-doped CoB alloy prepared at 25 °C has an initial discharge capacity of 825.8 mAh/g. After 100 charge/discharge cycles, the discharge specific capacity has remained to be 369.5 mAh/g with capacity retention of 44.7%.