Binderless fabrication of amorphous RuO2 electrode for electrochemical capacitor using spark plasma sintering technique |
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Authors: | K Kuratani N Kuriyama |
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Affiliation: | Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan |
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Abstract: | The spark plasma sintering (SPS) technique was successfully used to mold a hydrous amorphous RuO2electrode without any additives and binders. At the cyclic voltammetry (CV) scan rate of 1 mV s−1, the electrochemical capacitances of the RuO2 electrodes are 600-700 F g−1 for the entire electrode. An increase in the SPS current during the compaction led to the crystallization and dehydration of RuO2, which in turn, resulted in a significant decrease in its capacitance. There is room to improve the rate properties as we observed a steep drop in the capacitance when the CV scan rate was raised. |
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Keywords: | Pseudocapacitor Ruthenium oxide Spark plasma sintering Amorphous Water content |
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