NiCoSe4@CFF with excellent properties prepared by microwave method for flexible supercapacitors and oxygen evolution reaction

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2023, 120(0), , pp.467-476
• Main Authors: Du, Lijun, Lv, Ning, Li, Jiashuai, Zhang, Jiayi, Chen, Yilan, Zhang, Yalin, Li, Zhen, Huang, Xianqiang, Luo, Jujie
• Format: Article
• Language: English
• Subjects: Flexible supercapacitors; Microwave method; NiCoSe4@CFF; Oxygen evolution reaction; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2022.12.055

[Display omitted] •●A flexible electrode of NiCoSe4@CFF was prepared at a 120 s heating time via microwave method.•●NiCoSe4@CFF electrodes exhibit superior specific capacitance of 1653.6F g−1 at 1A g−1 and ultra-high cycle life of 87.05 % after 150,000 cycles.•●Low potential of 35.8 mV and a small Tafel slope of 115.93 mV dec–1 at 10 mA cm−2 for OER.•●NiCoSe4@CFF demonstrates superior performance and cycling stability in both supercapacitor and oxygen evolution reaction. NiCoSe4 nanoflowers were synthesized on carbon fiber felt (CFF) by microwave method, and the effects of microwave time and microwave power on the morphology, physical phase and performance of NiCoSe4@CFF were explored. The results display that the nanostructured NiCoSe4 prepared under the microwave irradiation of 1000 W for 120 s is uniformly loaded on the CFF. The NiCoSe4@CFF electrode exhibits a superior specific capacity of 1653.6F g−1 at 1A/g and maintains a superior cycling performance of 87.05 % of the initial capacitance over 150,000 cycles. In addition, the flexible supercapacitor fabricated with NiCoSe4@CFF as the cathode exhibits excellent flexibility and flexural strength. As an effective catalyst for oxygen evolution reaction (OER), NiCoSe4@CFF demonstrates a low overpotential of 0.358 V, a relatively small Tafel slope of 115.93 mV dec−1 and an excellent lifetime at 10 mA cm−2.