Core–Shell Carbon‐Coated CuO Nanocomposites: A Highly Stable Electrode Material for Supercapacitors and Lithium‐Ion Batteries

Abstract

Herein we present a simple method for fabricating core-shell mesostructured CuO@C nanocomposites by utilizing humic acid (HA) as a biomass carbon source. The electrochemical performances of CuO@C nanocomposites were evaluated as an electrode material for supercapacitors and lithium-ion batteries. CuO@C exhibits an excellent capacitance of 207.2 F g(-1) at a current density of 1 A g(-1) within a potential window of 0-0.46 V in 6 M KOH solution. Significantly, CuO electrode materials achieve remarkable capacitance retentions of approximately 205.8 F g(-1) after 1000 cycles of charge/discharge testing. The CuO@C was further applied as an anode material for lithium-ion batteries, and a high initial capacity of 1143.7 mA h g(-1) was achieved at a current density of 0.1 C. This work provides a facile and general approach to synthesize carbon-based materials for application in large-scale energy-storage systems.

Metal‐Organic Framework‐Derived Carbons for Battery Applications

“…[49] This review focuses on the application of MOF-derived carbon materials for batteries (including LIBs, Li-S batteries, SIBs, Li-O 2 batteries, Li-Se batteries, Zn-air batteries, Na-S batteries, Li-Te batteries, and Na-Se batteries). [61][62][63][64][65][66] Unfortunately, these materials are unable to substitute for graphite in industrialization because of the poor electronic conduction, large volume change, and failure to maintain its integrity during the charge/discharge cycles. Shen et al [25] reviewed the development of MOF-derived carbon-based materials for efficient catalysis.…”

Mixed surfactant controlled syntheses of solid Ni2P and yolk–shell Ni12P5 via a hydrothermal route and their photocatalytic properties

“…Yolk-shell with nano/micro-dimensional sizes, as a novel class of materials, have attracted much attention owing to their unique properties and great potential applications in various fields such as electrochemistry, optics, capacitors, batteries and photocatalysis [1][2][3][4][5][6][7]. Furthermore, the yolk-shell exhibit low density, high specific surface area, good permeation and surface permeability because they contain movable cores and interstitial hollow spaces [8,9].…”

Designing Core‐Shell Ni(OH)2@CuO Nanowire Arrays on 3D Copper Foams for High‐Performance Asymmetric Supercapacitors

“…Copper‐based oxide materials (Cu 2 O and CuO) as P‐type semiconductor have attracted intense interest and have been extensively employed in lithium‐ion batteries and supercapacitors . Recently, Wen et al.…”

“…Recently, Wen et al. constructed a core‐shell mesoporous structure CuO@C nanocomposite as an electrode material for lithium‐ion batteries and supercapacitors, and exhibited an excellent capacitance . Liu et al.…”

“…[14] Recently, Wen et al constructed a core-shell mesoporous structure CuO@C nanocomposite as an electrode material for lithium-ion batteries and supercapacitors, and exhibited an excellent capacitance. [14] Liu et al reported that unique hierarchical (CVO) Cu@CuO nanorod arrays were synthesized on copper foam by in situ oxidation reaction combines with calcination and cyclic voltammetry oxidization method, and exhibited excellent electrochemical performance for supercapacitors. [15] Furthermore, CuO nanowires usually play the role of "core" in hierarchical composite material with core/ shell structure due to its excellent performance, such as superior electrical conductivity, high-temperature durability and high mechanical strength.…”