摘要
以导电碳布(CC)为基底,以NiCl_(2)·6H_(2)O、CoCl_(2)·6H_(2)O为原料,以Al(NO_(3))_(3)·9H_(2)O为Al源,通过两步水热法成功在CC上生长Al掺杂的NiCo_(2)S_(4)复合材料(CC@Al-NiCo_(2)S_(4)).采用SEM、XRD、TEM和XPS对其进行了表征,并对CC@NiCo_(2)S_(4)电极和CC@Al-NiCo_(2)S_(4)电极的电化学性能进行了测试.结果表明,CC@Al-NiCo_(2)S_(4)具有中空纳米管结构,该结构可以提供大量反应活性位点;Al主要以Al^(3+)的形式存在于CC@NiCo_(2)S_(4)中,可以提高CC@NiCo_(2)S_(4)的导电性.当电流密度为1 A/g时,CC@NiCo_(2)S_(4)电极和CC@Al-NiCo_(2)S_(4)电极的比电容分别为844.5和1515.8 F/g;在电流密度为6 A/g下经过10000次循环后,CC@Al-NiCo_(2)S_(4)电极的电容保持率高达87.8%,表明Al掺杂能够显著提高CC@NiCo_(2)S_(4)的比电容和循环稳定性.
Al-doped NiCo_(2)S_(4)composite material(CC@Al-Ni Co_(2)S_(4))was successfully grown on carbon cloth(CC)via two-step hydrothermal method using CC as substrate,Ni Cl_(2)·6H_(2)O,CoCl_(2)·6H_(2)O as raw materials,and Al(NO_(3))_(3)·9H_(2)O as aluminum source.The sample was characterized by SEM,XRD,TEM and XPS.The electrochemical properties of CC@NiCo_(2)S_(4)and CC@Al-NiCo_(2)S_(4)electrodes were tested.The results showed that CC@Al-NiCo_(2)S_(4)had hollow nanotube structure,which could provide a large number of reaction sites.Al mainly in the form of Al;existed in CC@Ni Co_(2)S_(4)and improved the conductivity of CC@Ni Co_(2)S_(4).The specific capacitance of CC@Ni Co_(2)S_(4)and CC@Al-Ni Co_(2)S_(4)electrodes was 844.5 and1515.8 F/g at a current density of 1 A/g.After 10000 cycles at a current density of 6 A/g,the capacitance retention rate of CC@Al-Ni Co_(2)S_(4)was as high as 87.8%,indicating that Al doping could significantly improve the specific capacitance and cycle stability of CC@NiCo_(2)S_(4).
作者
周佳
刘杰
程思远
刘璐
陈星
邓正华
谢昆
ZHOU Jia;LIU Jie;CHENG Siyuan;LIU Lu;CHEN Xing;DENG Zhenghua;XIE Kun(Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir,Chongqing Three Gorges University,Chongqing 404100,China;School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,Jiangsu,China;Chongqing Engineering Technology Research Center for Light Alloy and Processing,Chongqing 404100,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第5期972-978,共7页
Fine Chemicals
基金
重庆市自然科学基金面上项目(cstc2021jcyj-msxmX1016,cstc2021jcyj-msxmX0899)
重庆市教委科学技术研究项目(KJQN202101238)
三峡库区水环境演变与污染防治重点实验室(WEPKL2019ZD-03)。
作者简介
周佳(1997-),女,硕士生,E-mail:3177572293@qq.com;联系人:谢昆(1979-),女,教授,E-mail:xiekun_79@163.com。
