3D nanoflower-like and core–shell structured MCo₂O₄@MCo₂S₄@polypyrrole (M = Cu, Mn) composites as supercapacitor electrode materials with ultrahigh specific capacitances

Abstract

Herein, we synthesize 3D nanoflower-liked MCo2O4@MCo2S4@Polypyrrole (MC@MS@PPy, M = Cu, Mn) core-shell composites on nickel foam (NF). MC nanowires and MS nanosheets grow vertically on NF as the core by...

Enhancing CO2 photoreduction through unique 2D MOF-based heterostructures with metalloid doping

“…42 The faint peak at 168.6 eV is attributed to the sulfate species. 43 The presence of the sulfate species (SO 4 2− ) is advantageous for enhancing the photocatalytic activity. 44,45 The S 2 2− species, characterized by a higher S chemical state, may possess superior electron trapping capabilities in the photocatalytic process, thereby improving the CO 2 photoreduction performance.…”

Synergistic coupling of NiVAl-layered double hydroxide with few-layered Ti3C2Tx–MXene nanosheets for superior asymmetric supercapacitor performance

“…22,35–38 EIS testing employs a frequency spectrum spanning from 0.01 to 100 kHz. The specific capacitance of a single electrode is calculated using the equation below: 39,40 here, C (mA h g −1 ) stands for the specific capacitance, i (A) stands for the discharge current, Δ t (s) stands for the discharge time, Δ V (V) stands for the voltage drop experienced during discharge, and m (g) stands for the active mass.…”

Electric field-induced ball-cactus-like CuCo2Sx(OH)y nano-heterostructure towards high-performance supercapacitors

“…42-1450), respectively. 34,35 Meanwhile, the peaks located at 19.1°, 32.5°, 38.8°and 59.7°can be indexed to the (001), (100), (002) and (003) lattice planes of Co(OH) 2 (JCPDS No. 74-1075), respectively.…”