Bimetallic oxides attract significant interest for application in supercapacitors because of their multivalent active sites, which render them highly efficient materials. Herein, we develop a new approach for the synthesis of a bimetallic oxide using a choline chloride and urea (1 : 2)-based deep eutectic solvent. We synthesize a unique amorphous nanofibrous network of RuCo2O4with an effective surface area of 245 m2g−1. By virtue of nanofibrous networks, amorphous behavior and high surface area, RuCo2O4exhibits a superior specific capacity of 372 mA h g−1at 3.3 A g−1with an excellent rate capability (55% after 41 A g−1) and cycling stability (94% after 10 000 cycles). Additionally, an aqueous hybrid supercapacitor cell is fabricated using RuCo2O4and reduced graphene oxide as a positive and negative electrode, respectively. The proposed RuCo2O4//rGO hybrid supercapacitor cell demonstrates an extended potential window of 1.4 V with an excellent energy density of 59.7
|Number of pages||11|
|Journal||Sustainable Energy and Fuels|
|Publication status||Published - 2020 Jun|
Bibliographical noteFunding Information:
This work was supported by a National Research Foundation (NRF) grant funded by the Ministry of Science, ICT, and Future Planning [grant number NRF-2018M3A7B4071535], the Priority Research Centers Program through the National Research Foundation of Korea [grant number NRF-2019R1A6A1A11055660], and the Yonsei University Research Fund (Postdoctoral Researcher Support Program) of 2019 [grant number 2019-12-0006].
© The Royal Society of Chemistry 2020.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology