NiO/Ni Co O Porous Ultrathin Nanosheet/nanowire Composite Structures As High-performance Supercapacitor Electrodes

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 13

PMID 35547508

Authors

Dongkai Jiang

Maojun Zheng

Yuxiu You

Liguo Ma

Pengjie Liu

Fanggang Li

Hao Yuan

Zhihao Zhai

Li Ma

Wenzhong Shen

Affiliations

Soon will be listed here.

Abstract

The demand for a new generation of high-safety, long-lifespan, and high-capacity power sources increases rapidly with the growth of energy consumption in the world. Here we report a facile method for preparing architecture materials made of NiO/Ni Co O porous nanosheets coupled with NiO/Ni Co O porous nanowires grown on nickel foams using a hydrothermal method without any binder followed by a heat treatment process. The nanosheet-shaped NiO/Ni Co O species in the nanosheet matrix function well as a scaffold and support for the dispersion of the Ni Co O nanowires, resulting in a relatively loose and open structure within the electrode matrix. Among all composite electrodes prepared, the one annealed in air at 300 °C displays the best electrochemical behavior, achieving a specific capacitance of 270 mF cm at 5 mA cm while maintaining excellent stability (retaining ≈ 89% of the max capacitance after 20 000 cycles), demonstrating its potential for practical application in power storage devices.

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