Structural and Electrochemical Performance of Additives-doped a-Ni(OH)_2  

作　　者：张仲举 朱燕娟 

机构地区：[1]School of Physics and Optoelectronic Engineering, Guangdong University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第3期538-541,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China (No.10774030);Science and Technology Program of Guangzhou City of China (No.2008J1-C161)

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.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.

关 键 词：additives-doped particle size distribution reaction reversibility proton diffusion coefficient charge-transfer resistance 

分 类 号：O614.31[理学—无机化学]