Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 608, Issue -, Pages 70-78Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.09.127
Keywords
Supercapacitor; Nickel-cobalt layered double hydroxide; Wood-derived monolithic carbon; Nitrogen-doped carbon materials
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A novel type of electrode material for high-performance hybrid supercapacitors is designed in this paper, showing excellent specific capacity and cycling stability. The composite electrode demonstrates high energy density and power density, making it a promising candidate for energy storage applications.
In this paper, a novel type of electrode material for high-performance hybrid supercapacitors is designed. The electrode mainly uses nitrogen-doped atoms to anchor the nickel-cobalt layered double hydroxide on the inner wall of wood-derived carbon tracheids from Chinese fir wood scraps. The specific capacity of the composite single electrode is 14.26 mAh cm(-2) at 10 mA cm(-2). The hybrid supercapacitor with a composite electrode cathode and nitrogen-doped wood-derived monolithic carbon materials as the anode has a high specific capacitance of 4.74F cm(-2) at 5 mA cm(-2), and the capacitance retention rate is 93.15% after 8000 charge-discharge cycles. The highest energy density and power density reach 1.48 mWh cm(-2) and 22.40 mW cm(-2), respectively. After doping with nitrogen, the combination with the nickel-cobalt layered double hydroxide is more uniform and stable, and the capacitance and cycling stability are significantly improved. (C) 2021 Elsevier Inc. All rights reserved.
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