Facile Synthesis of a NiCo₂O₄ Nanoparticles Mesoporous Carbon Composite as Electrode Materials for Supercapacitor

Abstract

Combination the materials together is a direct and forceful strategy to improve the electrochemical properties of each raw material. Herein, we present the method of hydrothermal process and treatment/calcination combination that is easy to synthesize a NiCo2O4 nanoparticles‐mesoporous carbon composite (C/NiCo2O4). The result study electrochemical properties of materials revealed that the C/NiCo2O4 composite has excellent electrochemical properties compare with pristine NiCo2O4 or carbon. In particular, maximum specific capacitance of C/NiCo2O4 material at a current density of 1 A.g−1 is 204.28 F.g−1, meanwhile the Cs of carbon and NiCo2O4 are 25.06 F.g−1 and 178.78 F.g−1, respectively. In addition, C/NiCo2O4 material also showed excellent capacitance retention, Cs maintained to 90.35% after 3000 charge‐discharge continuous cycles. The results show that the C/NiCo2O4 is a promising material for application as supercapacitor electrode.

Carbon nanomaterials and their composites for supercapacitors

“…Combining the conductivity and the Seebeck coefficient, the WS 2 /SWCNH (0.1) power factor reaches 128.41 W/mK 2 at 780 K. In addition, the thermoelectric excellence (zT) value of 0.017 (the original WS 2 ) was significantly increased to 0.027 (the WS 2 /SWCNH). Nguyen et al 84 CNTs as cathode material and AC as anode material material also has good electrochemical properties. The specific capacity is 150.88 F/g at 1 A/g and 81.17 F/g at 20 A/g, retaining 53.8% of the initial specific capacity.…”

“…Combining the conductivity and the Seebeck coefficient, the WS 2 /SWCNH (0.1) power factor reaches 128.41 W/mK 2 at 780 K. In addition, the thermoelectric excellence (zT) value of 0.017 (the original WS 2 ) was significantly increased to 0.027 (the WS 2 /SWCNH). Nguyen et al 84 prepared NiCo 2 O 4 nanoparticles mesoporous carbon composites (C/NiCo 2 O 4 ) which have an amorphous structure and spinel structure. Due to the synergistic effect, the CS of C/NiCo 2 O 4 is higher than that of original NiCo 2 O 4 or carbon.…”

Recent Research of NiCo2O4/Carbon Composites for Supercapacitors

“…However, biomass-derived carbon usually has the disadvantages of poor wettability and inferior areal capacitance. Nguyen et al [88] synthesized composites of NiCo 2 O 4 nanoparticles and mesoporous carbon using molten sugar as a carbon source, and it exhibited better electrochemical properties compared with carbon or pristine NiCo 2 O 4 . Zeng et al [89] prepared porous graphene/wood-derived carbon aerogels to support NiCo 2 O 4 by hydrothermal synthesis, and the composites exhibited a high-areal capacitance of 8.54 F cm −2 at 1 mA cm −2 .…”

Ultrafine Viscose‐Based Active Carbon Fibers for Iodide‐Ion Adsorption and Supercapacitors

“…In recent years, active carbon fibers (ACFs) with porous structure and large specific surface area (SSA) have received wide attention in various fields, such as energy storage, air purification, organic solvent adsorption and recovery, and sewage treatment. [ 1–6 ] ACFs possess narrowly distributed stomata along the outer surface toward the interior, which own higher adsorption–desorption kinetics and lower diffusion resistance than other powdered or granular‐activated carbon substances. [ 7,8 ] Generally, the organic precursor for ACFs mainly includes polyacrylonitrile fibers, [ 9,10 ] nitrile fibers, [ 11 ] asphalt fibers, [ 12,13 ] viscose fibers [ 14,15 ] and phenolic fibers.…”