High-performance quasi-solid-state flexible supercapacitors based on a flower-like NiCo metal-organic framework

Yongquan Du; Ruibin Liang; Junxi Wu; Yingyi Ye; Shaoyong Chen; Jian Yuan; Jianwen Chen; Peng Xiao

doi:10.1039/d1ra08785a

High-performance quasi-solid-state flexible supercapacitors based on a flower-like NiCo metal-organic framework

RSC Adv. 2022 Feb 16;12(10):5910-5918. doi: 10.1039/d1ra08785a.

Authors

Yongquan Du¹, Ruibin Liang¹, Junxi Wu¹, Yingyi Ye¹, Shaoyong Chen¹, Jian Yuan¹, Jianwen Chen², Peng Xiao^{1

3}

Affiliations

¹ School of Physics and Optoelectronic Engineering, Foshan University Foshan 528000 China xiaopeng@fosu.edu.cn.
² School of Electronic and Information Engineering, Foshan University Foshan 528000 China.
³ Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan 528000 China.

Abstract

NiCo metal-organic framework (MOF) electrodes were prepared by a simple hydrothermal method. The flower-like NiCo MOF electrode exhibited an exciting potential window of 1.2 V and an excellent specific capacitance of 927.1 F g^-1 at 1 A g^-1. The flower-like NiCo MOF//activated carbon (AC) device delivered a high energy density of 28.5 W hkg^-1 at a power density of 400.5 W kg^-1 and good cycle stability (95.4% after 5000 cycles at 10 A g^-1). Based on the flower-like NiCo MOF electrode, the asymmetric quasi-solid-state flexible supercapacitor (AFSC) was prepared and exhibited good capacitance retention after bending (79% after 100 bends and 64.4% after 200 bends). Furthermore, two AFSCs in series successfully lit up ten parallel red LED lights, showing great application potential in flexible and wearable energy storage devices.