Issue 29, 2022

Controllable synthesis of NiCo layered double hydroxide sheets on laser-induced graphene as electrodes for high-performance supercapacitors

Abstract

The development of high-efficiency electrode materials is very important for energy-storage devices with excellent performance. Graphene-based composites are known to be one of the most attractive electrode materials. Herein, NiCo-LDH@PX-LIG was prepared successfully, which could be used to build supercapacitor devices. In this study, LIG sheets were synthesized via a simple laser-direct-writing technology. Through controlling the laser power, a series of LIG sheets were obtained, which were demonstrated to be excellent candidates for depositing NiCo-LDH sheets under hydrothermal conditions. The results showed that the obtained NiCo-LDH@P12-LIG electrode exhibited outstanding electrochemical performance, including areal specific capacitances of 2072 and 1820 mF cm−2 at 2.5 and 25 mA cm−2, respectively, and a retention of 91% after 6000 cycles. An asymmetric supercapacitor device was fabricated using NiCo-LDH@P12-LIG as the positive electrode, and showed a high areal energy density of 0.26 mWh cm−2 at an areal power density of 2.05 mW cm−2, and excellent cycling stability (retention of 107% after 6000 cycles). This study provides a synthesis method for a graphene-based hybrid electrode material with excellent electrochemical performance, which is simple and efficient, and provides a new idea for the development of sustainable energy storage.

Graphical abstract: Controllable synthesis of NiCo layered double hydroxide sheets on laser-induced graphene as electrodes for high-performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
03 Apr 2022
Accepted
17 Jun 2022
First published
01 Jul 2022

CrystEngComm, 2022,24, 5251-5259

Controllable synthesis of NiCo layered double hydroxide sheets on laser-induced graphene as electrodes for high-performance supercapacitors

X. Xing, Z. Qu, L. Ge, X. Sun and F. Li, CrystEngComm, 2022, 24, 5251 DOI: 10.1039/D2CE00466F

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