Ultrafine nano zirconia as electrochemical pseudocapacitor material

作者：Zhang, Wei; Tan, Yueyue; Gao, Yilong; Wu, Jianxiang; Tang, Bohejin^*

来源：Ceramics International, 2015, 41(2): 2626-2630.

DOI：10.1016/j.ceramint.2014.10.047

• Capacitors
• Electrodes
• ZrO2
• Sol-gel processes

Ultrafine nano zirconia was prepared by a one-step sol-gel method and investigated by powder X-ray diffractions (PXRD) and transmission electron microscope (TEM). The results showed that its shape is spherical with the particle size from 2 to 3 nm. Electrochemical properties of nano zirconium oxide electrodes were measured by cyclic voltammetry, charge/discharge test and EIS in 6 M KOH electrolyte. The results obtained show that the ultrafine nano zirconia has a specific capacitance as high as 95 F g(-1) at scan rate of 5 mV s(-1). The capacitance is more than twice of the conventional zirconia, which was prepared from precipitation. In addition, the pseudocapacitor material exhibits excellent cycling performance, retaining 77% of the initial capacity after 500 cycles.

• 出版日期2015-3
• 单位上海工程技术大学