超声波对α-Ni（OH）_2电极结构及电化学性能的影响
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| Published in: | 中国有色金属学报：英文版 Vol. 21; no. 12; pp. 2654 - 2659 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | Get full text |
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| Bibliography: | Al/Co co-doped α-Ni（OH）2; ultrasonic co-precipitation method; proton diffusion coefficient; charge-transfer resistance; electrochemical performance 43-1239/TG Al/Co co-doped α-Ni（OH）2 samples were prepared by either ultrasonic co-precipitation method （Sample B） or co-precipitation method （Sample A）. The crystal structure and particle size distribution of the prepared samples were examined by X-ray diffraction （XRD） and laser particle size analyzer, respectively. The results show that Sample B has more crystalline defects and smaller average diameter than Sample A. The cyclic voltammetry and electrochemical impedance spectroscopy measurements indicate that Sample B has better electrochemical performance than Sample A, such as better reaction reversibility, lower charge-transfer resistance and better cyclic stability. Proton diffusion coefficient of Sample B is 1.96×10-10cm2/s, which is two times as large as that （9.78×10-11cm2/s） of Sample A. The charge-discharge tests show that the discharge capacity （308 mA·h/g） of Sample B is 25 mA·h/g higher than that of Sample A （283 mA·h/g）. ZHANG Zhong-ju, ZHU Yan-juan, BAO Jie, ZHOU Zhuo-jun, YE Xian-cong, XU Qing-sheng School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China |
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| ISSN: | 1003-6326 |