Abstract
In the past decades, the energy consumption of nonrenewable fossil fuels has been increasing, which severely threatens human life. Thus, it is very urgent to develop renewable and reliable energy storage devices with features of environmental harmlessness and low cost. High power density, excellent cycle stability, and a fast charge/discharge process make supercapacitors a promising energy device. However, the energy density of supercapacitors is still less than that of ordinary batteries. As is known to all, the electrochemical performance of supercapacitors is largely dependent on electrode materials. In this review, we firstly introduced six typical transition metal oxides (TMOs) for supercapacitor electrodes, including RuO2, Co3O4, MnO2, ZnO, XCo2O4 (X = Mn, Cu, Ni), and AMoO4 (A = Co, Mn, Ni, Zn). Secondly, the problems of these TMOs in practical application are presented and the corresponding feasible solutions are clarified. Then, we summarize the latest developments of the six TMOs for supercapacitor electrodes. Finally, we discuss the developing trend of supercapacitors and give some recommendations for the future of supercapacitors.
Highlights
The main purpose of developing supercapacitors is to meet the requirement of storing renewable energy
Supercapacitors have the advantages of high-power density, excellent cycle stability, and fast charge/discharge process
The performance of supercapacitors largely depends on the electrode materials
Summary
Ruibin Liang 1 , Yongquan Du 1 , Peng Xiao 1,2, *, Junyang Cheng 1 , Shengjin Yuan 1 , Yonglong Chen 1 , Jian Yuan 1,2 and Jianwen Chen 3. Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528225, China
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have