High-Temperature All Solid-State Microsupercapacitors based on SiC Nanowire Electrode and YSZ Electrolyte

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• 作者：Chun-Hui Chang ; Ben Hsia ; John P. Alper ; Shuang Wang ; Lunet E. Luna ; Carlo Carraro ; Shih-Yuan Lu ; Roya Maboudian
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：7
• 期：48
• 页码：26658-26665
• 全文大小：654K
• ISSN：1944-8252

文摘

We demonstrate a symmetric supercapacitor by using yttria-stabilized zirconia (YSZ) as the electrolyte and silicon carbide nanowires (SiC NWs) as the electrode. The stacked symmetric SiC NWs/YSZ/SiC NWs supercapacitors exhibit excellent thermal stability and high areal capacitance at temperatures above 300 掳C. The supercapacitor functions well at a record high temperature of 450 掳C, yielding an areal capacitance of 92 渭F cm^鈥? at a voltage scan rate of 100 mV s^鈥?. At this temperature, it is also capable of withstanding current densities up to 50 渭A cm^鈥?, yielding a maximum areal power density of 100 渭W cm^鈥?. Good cycling stability is demonstrated with a capacitance retention of over 60% after 10鈥?00 cycles at the operation temperature of 450 掳C and a scan rate of 200 mV s^鈥?.