Microspherical ZnO synthesized from a metal-organic precursor for supercapacitors

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• 作者：Guoyong Huang ; Wenjing Zhang ; Shengming Xu ; Yujing Li ; Yue Yang
• 关键词：ZnO ; Sphere ; Metal ; organic precursor ; Supercapacitor ; Energy storage and conversion
• 刊名：Ionics
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：22
• 期：11
• 页码：2169-2174
• 全文大小：787 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760
• 卷排序：22

文摘

In this paper, ZnO microspheres, which are composed of irregular nanoparticles, have been synthesized successfully from a metal-organic precursor. The average diameter is about 3.5 μm and the specific surface area is 7.53 m2 g−1. Measured by electrochemical tests as electrode materials for supercapacitors, the ZnO powders show high specific capacitances (1017.5 Fg−1 at 5 Ag−1 and 562.5 Fg−1 at 50 Ag−1, respectively) and excellent cycling stability (the specific capacitance was kept at 631.2 Fg−1 and 89.2 % retention after 3000 cycles at 18 Ag−1). These results show that the microspherical ZnO could be a potential electrode material for supercapacitors.