標題: Hydrous ruthenium oxide-tantalum pentoxide thin film electrodes prepared by thermal decomposition for electrochemical capacitors
作者: Xie, Jian-De
Hsu, Kai-Hsiang
Patra, Jagabandhu
Su, Ching-Yuan
Lee, Sheng-Wei
Gandomi, Yasser Ashraf
Ger, Ming-Der
Pu, Nen-Wen
Chang, Jeng-Kuei
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Supercapacitors;Pseudocapacitance;Compositional design;Metal oxide;Thin film
公開日期: 1-七月-2020
摘要: In this work, we have fabricated high-performance thin-film electrodes for electrochemical capacitors (ECs) via thermal decomposition syntheses of RuO2-Ta2O5 coating layers on Ti substrates. The influences of decomposition temperature as well as the Ru/Ta molar ratio on material and electrochemical properties of the EC electrodes are systematically investigated. The thermal decomposition of 300 degrees C preserves a large fraction of hydrous RuO2 center dot xH(2)O within the hybrid oxide and consequently improves the electrode capacitance. The amorphous Ta2O5 incorporation can manipulate the RuO2 crystallinity and thus its specific capacitance. An optimal Ru/Ta molar ratio of 7:3 is determined for the RuO2-Ta2O5 electrode, which can deliver an energy density of 4.8 Wh kg(-1) at a power density of 8720 W kg(-1) (or 8.3 Wh L-1 at 15,000 W L-1). In addition, an excellent durability of 97.6% capacitance retention after 3000 charge-discharge cycles is found for this electrode. The proposed RuO2-Ta2O5 thin-film electrode has paved the way for next-generation ECs with superior capacitances, energy/power densities, and cyclability.
URI: http://dx.doi.org/10.1016/j.ceramint.2020.03.236
http://hdl.handle.net/11536/154490
ISSN: 0272-8842
DOI: 10.1016/j.ceramint.2020.03.236
期刊: CERAMICS INTERNATIONAL
Volume: 46
Issue: 10
起始頁: 16636
結束頁: 16643
顯示於類別:期刊論文