Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Abstract

Due to the urgent demand for portable electronics, enormous research efforts are devoted for the development of flexible, wearable and lightweight supercapacitors. Herein, we report a cost‐effective chemical liquid process followed with a refluxing route to grow CC@CoMoO4‐Co(OH)2 nanosheets with Co‐based MOF as precursor. The resulting CC@CoMoO4‐Co(OH)2‐4 electrode delivers a significantly enhanced specific capacitance of 2028 F g−1 at 1 A g−1 and capacitance of 1581.8 F g−1 at 20 A g−1. Furthermore, the flexible all‐solid‐state asymmetric supercapacitor (CC@CoMoO4‐Co(OH)2//AC) is assembled, displays a high energy density of 61 Wh kg−1 at power density of 800 W kg−1, with an excellent cycle stability. These exceptional electrochemical performances could be ascribed to the unique structure and multi‐metal ion combination contributes to the ideal synergistic effects, which also signify that the potential application of CC@CoMoO4‐Co(OH)2 nansheets in high‐performance supercapacitors.

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

“…Compared with carbon materials, pseudocapacitive materials like metal oxides and organic conductive materials have higher specific capacitance owing to redox reaction on the surface of the material. In addition, ternary metal oxides have more active sites and faster redox reactions than single metal oxides, which become one of the materials to replace RuO 2 [ 53 , 172 , 173 , 174 ]. As the hotspots of mixed transition metal oxides, the transition metal molybdates have attracted much attention because of their advantages including natural abundance, high theoretical specific capacitance, and low costs [ 175 ].…”

ZnCdS/CoMoOS Photocatalyst with High Electron Flux at the Ternary Interface Enhances H2 production

“…Recently, a series of Co, Mo-based photocatalysts have been prepared successfully and displayed enhanced photoelectric catalytic performances. 10 Among these catalysts, CoMoO 4 −Co(OH) 2 has been widely utilized to synthesize various efficient electrocatalysts (e.g., CC@CoMoO 4 −Co-(OH) 2 , 11 CoMoO 4 −Co(OH) 2 /NF, 12 and P-CoMoO 4 −Co-(OH) 2 ) 13 because of its high electronic conductivity, abundant redox active sites, and polyvalent states. 14 Inspired by these superior attributes, CoMoO 4 −Co(OH) 2 may exhibit considerable promise for photocatalytic applications.…”

Hierarchical Transition Metal Oxide Arrays Grown on Graphene‐Based Fibers with Enhanced Interface by Thin Layer of Carbon toward Solid‐State Asymmetric Supercapacitors

“…Due to their prominent advantages of fast charge‐discharge and high power‐density, flexible fiber‐based supercapacitors have drawn considerable attention as long cycle life energy storage and conversion devices in many fields including portable and wearable electronics . However, their low energy‐density restricts their wide practical applications . Asymmetric supercapacitors (ASCs) with both battery‐type and electric double‐layer capacitive electroactive materials and extended operating voltage have been designed to enhance their energy density .…”