Advanced materials for aqueous supercapacitors in the asymmetric design

By M. Rajkumar, Chun-Tsung Hsu, Tzu-Ho Wu, Ming Chen, Chi-Chang Hu. 2015

206 citations recorded by the source corpus.

Abstract Supercapacitors have been recognized as one of the promising energy storage devices in the future energy technology. In this perspective, rapid progress is made in the development of fundamental and applied aspects of supercapacitors. Various techniques have been developed specifically to estimate the specific capacitance. Numerous efforts have been made in the literature to increase the specific capacitance of electrode materials. Recently, researchers pay more attention on designing supercapacitors of asymmetric type with extending cell voltage and dissimilar materials with complementary working potentials. Researchers try to increase the specific energy of asymmetric supercapacitors (ASCs). Conversely, it is still a challenge to find a suitable operation conditions for ASCs in various designs, especially for the one with battery type electrode. In this review, we describe our recent research works and other reports on the preparation of various nanostructured electrode materials and the performances of both symmetric and asymmetric supercapacitors. Finally, we demonstrate effects of charge balance on the capacitive performances of ASCs which consist of one electrode material of the battery type and one capacitive material. We also demonstrate how to evaluate the charge capacities of both positive and negative electrode materials for this ASC application.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/e2c755df49f641748f4bb779c2bc0c47c07ac469

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Citations in the corpus

Effect of doping on the performance of high-crystalline SrMnO3 perovskite nanofibers as a supercapacitor electrode (2018, methodology): “The specific energy (E) and specific power (P) are calculated using the following equations [70].”
Reviewing the fundamentals of supercapacitors and the difficulties involving the analysis of the electrochemical findings obtained for porous electrode materials (2020, background): “…the anode and cathode operate on different voltage windows during the charge-discharge processes (e.g., the connection of battery-like and capacitor-like electrodes with no signi ﬁ cant overlapping voltage ranges can afford an asymmetrical super-capacitor with high capacitance) [80,245 – 249]).”