电化学2017，Vol.23Issue(1)：28-35,8.DOI:10.13208/j.electrochem.160523
超级电容器用凹凸棒石负载氮掺杂碳@NiCo2O4复合电极材料的制备及其电化学性能研究
Preparation and Electrochemical Properties of Attapulgite-Supported Nitrogen-Doped Carbon@NiCo2O4 Composites for Supercapacitors
万慧 1应宗荣 1刘信东 1卢建建 1张文文1
作者信息
- 1. 南京理工大学化工学院,江苏南京210094
- 折叠
摘要
Abstract
In this work,the attapulgite-supported nitrogen-doped carbon (ANC) was prepared by in-situ chemically polymerizhag polyaniline coating upon attapulgite,followed by high temperature heat treatment,and then NiCo2O4 was reacted onto the surface of ANC by a combination of hydrothermal reaction and calcination to synthesize ANC@NiCo2O4 composites.The chemical composition and morphology of the samples were characterized by Fourier transform infrared spectroscopy (FTIR),X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and N2 adsorption/desorption.The electrochemical properties were evaluated by means ofconstant current charge discharge (GCD)andcyclicvoltammetry (CV).The results showed that due to the high specific surface area and porous structure of ANC,the NiCo2O4 particles were uniformly located on the surface,resulting ha large contact reaction areas with the electrolyte and improved electrochemical performance.At a current density of 1 A·g-1,the specific capacitance was up to 945.5 F·g-l,while at a current density of 16 A·g-1,it was 587.6 F·g-1,i.e.,the capacitance retention was 62.1％,revealing a better rate performance.After 2000 cycles of charge-discharge process at a high current of 12 A· g-1,the capacitance retention was 74.1％,higher than 48.7％ of pure NiCo2O4,which indicated that the as-prepared composite electrode materials had excellent electrochemical durability.关键词
凹凸棒石/氮掺杂/碳/NiCo2O4/电极材料/超级电容器Key words
attapulgite/carbon/nitrogen-doped/NiCo2O4/electrode material/supercapacitor分类
化学化工引用本文复制引用
万慧,应宗荣,刘信东,卢建建,张文文..超级电容器用凹凸棒石负载氮掺杂碳@NiCo2O4复合电极材料的制备及其电化学性能研究[J].电化学,2017,23(1):28-35,8.
