Enhanced performance of SnO2 xerogel electrochemical capacitor prepared by novel crystallization process |
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| Affiliation: | 1. Department of General Physics, State Pedagogical University, Lenin Street 86, Voronezh 394043, Russia;2. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow district 142432, Russia;3. Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47 Košice 04001, Slovak Republic;4. School of Mechanics and Civil Architecture, Northwestern Polytechnical University, Xi''an 710072, China |
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| Abstract: | The performance of both blank and RuO2-impregnated SnO2 (Sb-6 mol%) xerogel electrodes are enhanced significantly by improved crystallinity via a novel crystallization process, which effectively suppresses grain coarsening and hence allows the xerogel to be crystallized at high temperatures while maintaining a high surface area. The improved SnO2 electrodes show maximum specific capacitances which exceed 10 F g−1 in 1 M KOHaq at 200 mV s−1 after firing at 800 °C. The enhancement becomes increasingly pronounced with increasing charge–discharge rate due to improved oxide conductivity. |
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