Honeycomb-like NiCo2O4@Ni(OH)2 supported on 3D N−doped graphene/carbon nanotubes sponge as an high performance electrode for Supercapacitor

Two‐Dimensional Exfoliated MoS2 Flakes Integrated with Polyindole for Supercapacitor Application

“…The uniformly spread PIn leads to more exposed electrochamical active area. Also, the increase in the mesoporosity leads to continuously connected easy paths for the electrolytic ions to get transferred within the electrode material . Also, as can be seen from the Nyquist plot (Figure D) the projection on the Z’‐axis for the PIn/MoS 2 compoiste is also the smallest which implie towards a shorter developed ion diffusion path.…”

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…Various synthetic routes have been reported for the fabrication of binder-free electrode composed of carbon substrate (e. g. carbon foam, CNT film, 3D graphene foam, carbon paper/cloth, or biomass-derived carbon) and transition metal oxides as pseudocapacitive materials to achieve high energy density supercapacitor. [62,67,98,99] Carbon coated sponges/foams with 3D porous structure have been considered as potential carbon substrate since their inner and outer surfaces are suitable for the deposition of active materials, and their general properties including lightweight, great flexibility and low cost make them more attractive. [62,100] In addition, the macroporosity and high-surface area of these materials promote the facile electrolyte-electron movement even at very high rates.…”

“…Inspired by the recent progress of binder-free C-TMO hybrid electrode, Tong et al adopted the different design concepts and combined them into a single advance electrode. [99] Commercial PU sponge was used to prepare an N-doped 3D graphene-CNT elastic conductive substrate, which is then used to directly grow the NiCo 2 O 4 @Ni(OH) 2 core-shell nanostructures. These design concepts offer structures that are rich in diffusion channels and have excellent electric conductivity, high specific surface area (SSA), dual storage mechanism, and exceptional mechanical stability.…”

Hexadecyl trimethyl ammonium bromide assisted growth of NiCo2O4@reduced graphene oxide/ nickel foam nanoneedle arrays with enhanced performance for supercapacitor electrodes

“…Therefore, NiCo 2 O 4 has higher electrochemical activity than pure nickel or cobalt oxides, and its electronic conductivity (10 −1 to 10 2 S cm −1 ) is better than Co 3 O 4 and NiO. 12,13 Based on this, NiCo 2 O 4 has become the research hotspot of electrode materials for supercapacitors in recent years. However, its poor cycle stability and rate performance limit its application in practice.…”

“…Most of the researches were focused on loading transition metal oxides such as MnO 2 , 24 Ni(OH) 2 (ref. 13 ) on the surface of NiCo 2 O 4 , or loading NiCo 2 O 4 on porous materials with large surface area and high conductivity, such as nickel foam (NF) 25 and carbon materials, 26 etc. Among them, graphene as an infinitely scalable two-dimensional crystal material, which has a large specific surface area (2630 m 2 g −1 ), good electronic conductivity and chemical stability, 27 has been widely used in the preparation of composite electrode materials for supercapacitors since it was successfully isolated from graphite by Geim group in 2004.…”