添加有NiOOH的混合晶型Ni(OH)2的电化学性能研究

doi:10.3724/SP.J.1077.2010.01099

无机材料学报 ›› 2010, Vol. 25 ›› Issue (10): 1099-1104.DOI: 10.3724/SP.J.1077.2010.01099

添加有NiOOH的混合晶型Ni(OH)₂的电化学性能研究

袁国霞, 黄可龙, 刘素琴, 仲晓玲

(中南大学化学化工学院, 长沙 410083)

收稿日期:2010-02-03 修回日期:2010-04-11 出版日期:2010-10-20 网络出版日期:2010-09-26
基金资助:
国家自然科学基金(50772133)

Electrochemical Performance of Multiphase Ni(OH)₂Added with NiOOH

YUAN Guo-Xia, HUANG Ke-Long, LIU Su-Qin, ZHONG Xiao-Ling

(College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, China)

Received:2010-02-03 Revised:2010-04-11 Published:2010-10-20 Online:2010-09-26
Supported by:
National Nature Science Foundation of China (50772133)

摘要/Abstract

摘要： 采用络合沉淀法制备了具有特殊表面纳米片状结构的微米级混合晶型氢氧化镍, 并研究了添加化学氧化NiOOH纳米颗粒对上述材料电化学性能的影响. 采用SEM、XRD等手段表征了样品的形貌及物相特征, 并考察了其作为镍氢电池正极活性材料的电化学性能. 结果表明: 添加的纳米片状β-NiOOH随机分布在氢氧化镍表面. 以制备的样品为正极材料组装成镍氢模拟电池, 在0.2C充放电条件下, 制备材料的放电比容量可达306mAh/g; 添加NiOOH能有效地改善镍电极的电化学性能, 添加量为7wt%时, 0.2C充放电条件下样品放电比容量为326mAh/g, 在2C充放电条件下放电比容量可达311mAh/g.

关键词: 氢氧化镍, 羟基氧化镍, 化学氧化

Abstract: Micron-size multiphase nickel hydroxides with nanosheets structure were synthesized by coordination homogeneous precipitation method. Chemically oxidized NiOOH nanoparticles were added subsequently in order to improve their electrochemical performance. The samples were characterized by XRD and SEM. The results show that the NiOOH particles with flake-like morphology are dispersed randomly on the surface of the multiphase Ni(OH)₂. The simulated Ni/MH battery with the multiphase Ni(OH)₂ as positive active material has the discharge capacity of 306 mAh/g at 0.2C charge/discharge rate. The existence of chemically oxidized NiOOH in the nickel electrode exert great effect on the improvement of electrochemical performance. The discharge capacity of the sample added with 7 wt% NiOOH reaches 326 mAh/g at 0.2C and 311mAh/g at 2C.

Key words: nickel hydroxide, nickel oxyhydroxide, chemical oxidation

中图分类号:

TM912

袁国霞, 黄可龙, 刘素琴, 仲晓玲. 添加有NiOOH的混合晶型Ni(OH)₂的电化学性能研究[J]. 无机材料学报, 2010, 25(10): 1099-1104.

YUAN Guo-Xia, HUANG Ke-Long, LIU Su-Qin, ZHONG Xiao-Ling. Electrochemical Performance of Multiphase Ni(OH)₂Added with NiOOH[J]. Journal of Inorganic Materials, 2010, 25(10): 1099-1104.

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添加有NiOOH的混合晶型Ni(OH)₂的电化学性能研究

Electrochemical Performance of Multiphase Ni(OH)₂Added with NiOOH

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