球磨对ZnO的结构、形貌和电化学性能的影响

doi:10.3724/SP.J.1077.2012.00580

无机材料学报 ›› 2012, Vol. 27 ›› Issue (6): 580-584.DOI: 10.3724/SP.J.1077.2012.00580 CSTR: 32189.14.SP.J.1077.2012.00580

球磨对ZnO的结构、形貌和电化学性能的影响

李佳佳, 赵相玉, 马立群, 杜伟, 丁毅

(南京工业大学材料科学与工程学院, 南京210009)

收稿日期:2011-07-20 修回日期:2011-11-16 出版日期:2012-06-20 网络出版日期:2012-05-07
作者简介:李佳佳(1987-), 女, 硕士研究生. E-mail: nantongyifeng@yahoo.cn
基金资助:
江苏高校优势学科建设工程资助项目; 江苏省2011年度普通高校研究生科研创新计划项目; 稀土资源利用国家重点实验室开放课题(2011010)

Effect of Mechanical Milling on Structure, Morphology and Electrochemical Performance of Zinc Oxide Powders

LI Jia-Jia, ZHAO Xiang-Yu, MA Li-Qun, DU Wei, DING Yi

(College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)

Received:2011-07-20 Revised:2011-11-16 Published:2012-06-20 Online:2012-05-07
About author:LI Jia-Jia. E-mail: nantongyifeng@yahoo.cn
Supported by:
Priority Academic Program Development of Jiangsu Higher Education Institutions; Research Innovative Projects for Average College Graduate Students of 2011 in Jiangsu Province; Open Subject of State Key Laboratory of Rare Earth Resource Utilization(2011010)

摘要/Abstract

摘要： 通过机械球磨对ZnO粉末进行处理. 采用XRD、SEM对不同球磨时间的ZnO粉末的相结构和形貌进行表征, 用恒电流充放电实验研究其在锌镍电池体系中的放电特性和循环稳定性, 并结合循环伏安法探讨其充放电机理. 实验结果表明, 球磨过程中位错的形成和运动导致晶粒尺寸的减小和晶格应变值的增大, 晶粒尺寸由135.6 nm减小至17.9 nm, 晶格应变值相应地从0.06%增加到0.57%. 球磨处理提高了ZnO粉末的电化学反应活性, 因而其放电容量逐渐增加. 当球磨时间达到100 h时, ZnO的放电容量达到300.6 mAh/g, 比未球磨的高50 mAh/g.

关键词: 球磨, ZnO, 结构, 电化学性能

Abstract: ZnO powders were treated by mechanical milling. The structure and morphology of ZnO powders milled for different periods were characterized by XRD and SEM. The discharge behavior and cycle life of ZnO electrodes in Zn/Ni batteries were studied by galvanostatic charge and discharge tests. The incorporation of cycle voltammetry was adopted to investigate charge and discharge mechanisms of ZnO electrodes. The results showed that the grain size of the powders decreased from 135.6 nm to 17.9 nm while the lattice strain increased from 0.06% to 0.57% during milling, which could be attributed to the formation and movement of dislocations. The electrochemical reaction activity of ZnO powders was improved by mechanical milling, resulting in an increase of discharge capacity. ZnO powders milled for 100 h shows a high discharge capacity of 300.6 mAh/g, which is 50 mAh/g higher than that of the unmilled ZnO powders.

Key words: mechanical milling, ZnO powders, structure, electrochemical performance

中图分类号:

TQ174

李佳佳, 赵相玉, 马立群, 杜伟, 丁毅. 球磨对ZnO的结构、形貌和电化学性能的影响[J]. 无机材料学报, 2012, 27(6): 580-584.

LI Jia-Jia, ZHAO Xiang-Yu, MA Li-Qun, DU Wei, DING Yi. Effect of Mechanical Milling on Structure, Morphology and Electrochemical Performance of Zinc Oxide Powders[J]. Journal of Inorganic Materials, 2012, 27(6): 580-584.

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球磨对ZnO的结构、形貌和电化学性能的影响

Effect of Mechanical Milling on Structure, Morphology and Electrochemical Performance of Zinc Oxide Powders

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