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タイトル: | All solid-state electrochemical capacitors using N,N-dimethylpyrrolidinium fluorohydrogenate as ionic plastic crystal electrolyte |
著者: | Taniki, Ryosuke Matsumoto, Kazuhiko https://orcid.org/0000-0002-0770-9210 (unconfirmed) Nohira, Toshiyuki https://orcid.org/0000-0002-4053-554X (unconfirmed) Hagiwara, Rika https://orcid.org/0000-0002-7234-3980 (unconfirmed) |
著者名の別形: | 松本, 一彦 |
キーワード: | Electrochemical capacitor Ionic plastic crystal Fluorohydrogenate salt Activated carbon Double-layer Redox capacitor |
発行日: | Jan-2014 |
出版者: | Elsevier B.V. |
誌名: | Journal of Power Sources |
巻: | 245 |
開始ページ: | 758 |
終了ページ: | 763 |
抄録: | An electrochemical capacitor using an ionic plastic crystal of N, N-dimethylpyrrolidinium fluorohydrogenate (DMP_{yr}(FH)_{2}F) as a solid electrolyte has been successfully operated with activated carbon electrodes at 298 K. Typical square-shapes for electric double-layer capacitors are observed in the cyclic voltammogram within the narrow potential regions. In the wide potential regions, the redox reactions involving fluorohydrogenate anions occur on both the positive and negative electrodes. The galvanostatic charge–discharge test confirms stable operation of the electrochemical capacitor using the present ionic plastic crystal. The capacitances of the positive and negative electrodes are 263 and 221 F g^{−1} (capacitance per gram of electrode weight), respectively, at the 300th cycle when the cell is charged up to the voltage of 2.5 V with a current density of 238 mA g^{−1}. The ac impedance test shows that ions in the ionic plastic crystal form double-layer between electrolyte and internal surface of the pore of activated carbon. The open-circuit voltage decreases proportionally to the square root of time within the first 10 s after galvanostatic charging, which confirms that the ions inhomogeneously distributed in the pore of activated carbon migrate to be homogeneous under a diffusion-limited process. |
著作権等: | © 2013 Elsevier B.V. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/178039 |
DOI(出版社版): | 10.1016/j.jpowsour.2013.07.020 |
出現コレクション: | 学術雑誌掲載論文等 |
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