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Effect of surface treatment on the structure and high-rate dischargeability properties of ABs-type hydrogen storage alloy |
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| Authors: | ZHANG Peilong WANG Xiuli TU Jiangping CHEN Guoliang |
| Affiliation: | 1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083. China; 2. Hold Fortune (Beifing) Industry Co., Ltd., Beijing 100083, China; 3. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China) |
| Abstract: | Surface-treated MmNi3.55Co0.75Mn0.4Al0.3 alloy as negative electrode material of nickel-metal hydride battery was employed to improve the high-rate dischargeability. Surface treatment was realized by dipping and stirring the alloy into a HCl aqueous solution with various concentrations at room temperature. The microstructure of the alloy before and after surface treatment was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical properties before and after surface treatment were comparedand the alloy treated in 0.025 mol/L HCl solution showed the optimal high-rate dischargeability. |
| Keywords: | hydrogen storage alloys surface treatment electrochemical properties high-rate dischargeability rare earths |
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