Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 862, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2020.114012
Keywords
CoFe; Layered double hydroxide; Symmetric cell device; Hydrothermal
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Funding
- Yeungnam University
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Layered double hydroxides (LDHs) are gaining serious attention as electrode materials for electrochemical energy storage device due to their enhanced redox reactions. It is essential to find a better candidate for energy storage device possessing high ion adsorption and faster surface redox reactions that can lead to improved charge transfer and controlled ionic and electronic transport. Herein, a network of curly-edged CoFe-layered double hydroxide (LDH) nanosheets was grown on Ni foam via a one-pot hydrothermal synthesis route. We studied the stepwise morphological evolution and electrochemical performance of CoFe-LDH during variable hydrothermal reaction conditions. After 5000 charge-discharge cycles, the CoFe-LDH exhibited a maximum areal capacity of 2263 mC cm(-2) (at a scan rate of 5 mV s(-1)) and 1490 mC cm(-2) (at an applied current of 0.1 A) with capacity retention of 92.6%. We also fabricated and tested the electrochemical properties of a symmetric cell device using CoFe-LDH, demonstrating that the CoFe-LDH is a promising candidate as an electrode material in energy storage applications. (c) 2020 Elsevier B.V. All rights reserved.
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