Ultrathin ZnS nanosheet/carbon nanotube hybrid electrode for high-performance flexible all-solid-state supercapacitor

Facile SILAR Processed Bi2S3:PbS Solid Solution on MWCNTs for High‐performance Electrochemical Supercapacitor

“…The Ragone plot shown in Figure c illustrates the consumption of maximum energy density of 13.36 Wh/kg (with power density of 0.83 kW/kg) and power density of 1.67 kW/kg (with energy density of 4.77 Wh/kg) for the fabricated cell. The energy density of fabricated cell is significantly comparable with high‐performance symmetric cells fabricated by recently reported composite materials such as ZnCo 2 O 4 /rGO (11.44 Wh/kg), PEDOT:PSS/MWCNT (13.2 Wh/kg), waste paper fibers‐RGO–MnO 2 (19.6 Wh/kg), ZnS/CNTs (22.3 Wh/kg), and N‐doped cotton‐derived carbon frameworks (NCCF)‐rGO (20 Wh/kg) . Surely, the hybrid electrode shows maximum energy density than ordinary capacitors and conventional ultracapacitors and, provides larger power density significantly than the common batteries and fuel cells.…”

Construction of Porous ZnS@Co3S4@NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping

“…Figure 7a,b show the CV curves of ZnS@Co 3 S 4 nanorods and ZnS@Co 3 S 4 @NiO nanosheets at different scan rates between 0 to 0.65 V. It can be found that the redox peaks show different features compared with traditional double layer capacitance, indicating a quasireversible Faradaic redox reaction resulted from a conversion of Ni 2+ /Ni 3+ , Co 2+ /Co 3+ , and Co 3+ /Co 4+ , indicating a characteristic of pseudocapacitors. Hence, the faradaic redox reactions can be described as follows: [23,46,47] The asymmetrical cathodic and anodic peaks exhibit a quasireversible oxidation-reduction process of the as-prepared samples, which can be ascribed to the polarization caused by the diffusion of ions and electrolyte. As the scan rate increases, the peak positions of the oxidation peak and reduction peak shift to positive and negative directions because the internal diffusion resistance within the bulk increases with increasing of scan rate, respectively.…”

Hierarchical structure N, O-co-doped porous carbon/carbon nanotube composite derived from coal for supercapacitors and CO2 capture

“…In recent years, CNTs composite materials have drawn signicant research attention as electrodes for supercapacitors and have shown improved electrochemical properties. [20][21][22][23] In addition to structural frameworks, heteroatom doping also helps to improve the performance of porous carbon with the introduction of pseudocapacitor behavior. 24,25 Furthermore, the introduction of heteroatoms (such as more electron-rich N and S) can bring more electrons to the delocalized p-system of carbon and more heterogeneous species, which consequently increase the electrical conductivity, improve the wettability, and also enhance CO 2 adsorption capacity.…”