Structural and electrochemical performance of additives-doped α-Ni(OH)2 |
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引用本文: | 张仲举,朱燕娟.Structural and electrochemical performance of additives-doped α-Ni(OH)2[J].武汉理工大学学报(材料科学英文版),2012,27(3):538-541. |
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作者姓名: | 张仲举 朱燕娟 |
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作者单位: | School of Physics and Optoelectronic Engineering, Guangdong University of Technology |
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基金项目: | Funded by National Natural Science Foundation of China (No.10774030);Science and Technology Program of Guangzhou City of China (No.2008J1-C161) |
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摘 要: | The additives-doped α-nickel hydroxides were prepared by supersonic co-precipitation method. The crystal structure and grain size of the prepared samples were characterized by X-ray diffraction (XRD) and Particle size distribution (PSD), respectively. Cyclic voltammetry (CV) tests show that Al-Co-Y doped Ni(OH)2 has better reaction reversibility, higher proton diffusion coefficient than those of Al-Co doped Ni(OH)2. Al-Co-Y doped Ni(OH)2 also has lower charge-transfer resistance as shown by electrochemical impedance spectroscopy (EIS). Charge/discharge tests show that the discharge capacity of Al-Co-Y doped Ni(OH)2 reaches 328 mAh/g at 0.2 C and 306 mAh/g at 0.5 C, while Al-Co doped Ni(OH)2 can only discharge a capacity of 308 mAh/g at 0.2 C and 267 mAh/g at 0.5 C.
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关 键 词: | additives-doped particle size distribution reaction reversibility proton diffusion coefficient charge-transfer resistance |
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