Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 14, Pages 16165-16177Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c24512
Keywords
CuBr2@NCC-LDH/CF; ternary layered double hydroxides; ZIF-67; porous structure; supercapacitors
Funding
- Qingdao Innovation Leading Talent Program
- Double-Hundred Foreign Experts Program of Shandong Province
- National Natural Science Foundation of China [21805124]
- Natural Science Foundation of Shandong Province [ZR2018BEM020]
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In this study, a NiCeCo-layered double hydroxide-chlorine-bridged compound was successfully synthesized and demonstrated excellent electrochemical performance in a binder-free electrode. The unique structure and complex assembly of the electrode resulted in remarkable capacitance and low internal resistance, allowing for high energy density in an all-solid-state supercapacitor when assembled with activated carbon electrodes. The supercapacitor enabled continuous operation of a multifunctional display for over three and a half hours.
Ternary layered double-hydroxide-based active compounds are regarded as ideal electrode materials for supercapacitors because of their unique structural characteristics and excellent electrochemical properties. Herein, an NiCeCo-layered double hydroxide with a core-shell structure grown on copper bromide nanowire arrays (CuBr2@NCC-LDH/CF) has been synthesized through a hydrothermal strategy and calcination process and utilized to fabricate a binder-free electrode. Due to the unique top-tangled structure and the complex assembly of different active components, the prepared hierarchical CuBr2@NCC-LDH/CF binder-free electrode exhibits an outstanding electrochemical performance, including a remarkable areal capacitance of 5460 mF cm(-1) at 2 mA cm(-2) and a capacitance retention of 88% at 50 mA cm(-2) as well as a low internal resistance of 0.163 Omega. Moreover, an all-solid-state asymmetric supercapacitor (ASC) installed with CuBr2@NCC-LDH/CF and activated carbon electrodes shows a high energy density of 118 Wh kg(-1) at a power density of 1013 W kg(-1). Three assembled ASCs connected in series can operate a multifunctional display for over three and a half hours. Therefore, this innovative work provides new inspiration for the preparation of electrode materials for supercapacitors.
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