Cyclic stability of supercapacitors: materials, energy storage mechanism, test methods, and device

Abstract

Supercapacitors, also known as electrochemical capacitors, have attracted more and more attentions in recent decades due to their advantages of higher power density and long cycle life. For the real...

Multifunctional CeO2incorporated Fe2O3anchored on a rich porous structured carbon backbone for supercapacitors and adsorption of acid orange II

“…For electrochemical experiments, a three-electrode setup with 6 M KOH as the electrolyte solution was utilized at room temperature with an electrochemical analyzer (CHI760E workstation, Shanghai Chenhua), whose data was represented by cyclic voltammetry (CV) with potentials ranging from 0.1 to 0.4 V and at various scan rates, galvanostatic discharge/charge (GDC) tests, and electrochemical impedance spectroscopy (EIS) tests. The specific capacity of the electrode material may be computed using the cyclic voltammetry curve in the three-electrode system test, and the formula for determining the specific capacity of mass is presented in Formula (1): 31 where I is current (A); is the integrated area of the CV curve; ν is the scan rate (V s −1 ); m is the mass of the active material (g); and Δ U is the voltage range (V).…”

Hierarchical Ni(OH)2–MnO2hollow spheres as an electrode material for high-performance supercapacitors

“…1,2 It is notable that electrode materials have been proven to efficiently enhance the performance of supercapacitors. 3 Thus, extensive research on various electrode materials has been published. To date, several metal oxides, including nickel oxides, 4 cobalt oxides and manganese oxides, 5,6 have been exploited in supercapacitors.…”

Interfacial engineering in amorphous/crystalline heterogeneous nanostructures as a highly effective battery-type electrode for hybrid supercapacitors

“…Development of hybrid HSCs that combine battery types and capacitor electrode materials is an effective strategy to improve these parameters. [7][8][9][10] Recently, tremendous efforts have been made to designing novel nanostructured, high-rate performance, and low-cost electrochemical materials, including metal phosphides, metal oxides and metal suldes. [11][12][13] In addition, transition metal phosphates (TMPs) have become the research emphasis due to their higher electrical conductivity and high capacity for HSCs.…”

“…Development of hybrid HSCs that combine battery types and capacitor electrode materials is an effective strategy to improve these parameters. 7–10…”