α/β互嵌氢氧化镍电极活性材料的结构和电化学性能

材料研究学报, 2011, 25(1): 51-56.

α/β互嵌氢氧化镍电极活性材料的结构和电化学性能

1.1.桂林理工大学化学与生物工程学院桂林 541004

2.2.桂林理工大学有色金属及材料加工新技术教育部重点实验室桂林 541004>

1.1. College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 5410042. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials of Ministry of Education, Guilin University of Technology, Guilin 541004>

基金项目: 国家自然科学基金20563001、中国博士后科学基金20090450188和广西自然科学基金0991247资助项目。

关键词：无机非金属材料 , nickel hydroxide , electrode active material , microstructure , electrochemical performance

The Structure and Electrochemical Performance of α/β Mutually Embedded Nickel Hydroxide

LI Yanwei LI Yuexiao YAO Jinhuan LIU Changjiu ZHU Wenfeng

Keywords： inorganic non–metallic materials , 氢氧化镍 , 电极活性材料 , 微观结构 , 电化学性能

采用化学共沉淀法制备了具有α相和β相相互嵌套结构的氢氧化镍。用X--射线衍射(XRD), 傅里叶变换红外光谱(FT--IR)和扫描电子显微镜(SEM)分析了样品的微观结构和表面形貌。用循环伏安(CV)、交流阻抗(EIS)和充放电测试表征了样品的电化学性能。结果表明, 与纯β相氢氧化镍相比, α/β互嵌结构的氢氧化镍具有更高的电化学反应活性、更低的电化学反应阻抗和更高的放电比容量和放电电压。同时, α/β互嵌结构氢氧化镍还具有较好的循环性能。

α/β mutually embedded nickel hydroxide has been synthesized by chemical coprecipitation method. The microstructure and surface morphology of the prepared samples were analyzed by X–ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The electrochemical performance of the prepared sample was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge discharge tests. Compared to the pure β nickel hydroxide, the α/β mutually embedded nickel hydroxide shows a higher electrochemical reaction activity, lower electrochemical reaction impedance, higher discharge capacity, and higher discharge voltage. Moreover, α/β mutually embedded nickel hydroxide has better cyclic performance.

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]
[49]
[50]
[51]
[52]
[53]
[54]
[55]
[56]
[57]
[58]
[59]
[60]
[61]
[62]
[63]
[64]
[65]
[66]
[67]
[68]
[69]	XIAO Huiming, WANG Jianming, CHEN Hui, PAN Tao, ZHANG Jianqing, Synthesis of Al&ndash

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网