Versatile electrochemical activation strategy for high-performance supercapacitor in a model of MnO₂

Abstract

Electrochemical activation was used to boost surface- and diffusion-controlled capacitance of MnO2 by optimized charge–discharge cycling operations.

Nickel/Cobalt Molybdate Hollow Rods Induced by Structure and Defect Engineering as Exceptional Electrode Materials for Hybrid Supercapacitor

“…The special structure displayed a larger specific surface area and more active sites, enhancing the surface capacitance of the D−H−NiMoO 4 @CoMoO 4. [28–31] Such a hollow structure reduces the potential collapse of the material, caused by large volume expansion/contraction phenomenon, and also provides a shortened ion/charge transport path [15,32–34,38] . High‐resolution TEM (HRTEM) image and selected area electron diffraction (SAED) pattern (Figure 2e and Figure 2f) showed the corresponding lattice spacing, suggesting an optimal composite synthesis, with interplanar spacing at 0.31 nm and 0.27 nm, corresponding to (220) plane of NiMoO 4 and (022) plane of CoMoO 4 , respectively [15,22,23,25,42] .…”

Cu-MOF derived Cu–C nanocomposites towards high performance electrochemical supercapacitors

“…As a new type of energy storage equipment between traditional capacitors and batteries, supercapacitors have the advantages of high power density, fast charge and discharge, long cycle time and low environmental pollution, thus they have wide application in the elds of spare power systems, portable electronic equipment, information technology and hybrid electric vehicles. [1][2][3][4][5][6][7][8][9][10][11][12][13] However, the low energy density and multiplier performance of supercapacitors restrict their practical application. Therefore, it is important to develop new electrode materials with high electrochemical performance.…”

Ultra-thin NiS nanosheets as advanced electrode for high energy density supercapacitors

“…The relationship between the measured current (i) and sweep rate (v) could be described by the power law. 22,23 i ¼ av b…”