Open AccessPreparation and Application of CQDs/Ni(OH)20.75H2O as Electrodes in Supercapacitors
Author(s) -
Yunlong Zhou,
Hanxiu Fu,
Junwen Peng,
Weize Chen,
Kunfeng Cen,
Jingru Lv,
Xiaofen Cao
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2097/1/012023
Subject(s) - diffractometer , materials science , cyclic voltammetry , scanning electron microscope , supercapacitor , electrode , nickel , dielectric spectroscopy , composite number , electrochemistry , hydrothermal circulation , chemical engineering , composite material , metallurgy , chemistry , engineering
In this paper, a hydrothermal synthesis method for preparation Carbon Quantum Dots (CQDs)/Ni(OH) 2 0.75H 2 O composite electrode material, and loaded on Nickel Foam(NF) by rolling method. The crystal phase, structure, morphology and the reaction process were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The electrochemical properties of the composite were measured by cyclic voltammetry impedance spectroscopy and couple method charge-discharge techniques. The results showed that the composites material was evenly adhered to nickel foam. When the current density is 1 A g −1 , the specific capacity of CQDs/Ni (OH) 2 0.75H 2 O composite can reach 2115.4 Fg −1 , which is close to 5 times of Ni (OH) 2 0.75 H 2 O electrode material.