title: 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.
authors: School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, 215123 (P.R. China); Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions (P.R. China); Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei (P.R. China).
authors: Tao
authors: T
authors: Wen
authors: Xi-Lin
authors: XL
authors: Wu
authors: Shouwei
authors: S
authors: Zhang
authors: Xiangke
authors: X
authors: Wang
authors: An-Wu
authors: AW
authors: Xu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission
chemical_list: D002244:Carbon; D003300:Copper; D008094:Lithium; C030973:cupric oxide
keywords: biomass; copper; core-shell structures; energy storage; nanotechnology