摘要
在制备含铁碳纳米管(Fe@NCNTs)的过程中分别加入铜(Cu)、镍(Ni)和钴(Co)盐,得到3种双金属碳纳米管材料(CuFe@NCNTs,NiFe@NCNTs和CoFe@NCNTs).通过扫描电子显微镜(SEM)、N_(2)气吸附-脱附曲线测试、X射线衍射(XRD)、X射线光电子能谱(XPS)和拉曼光谱(Raman)对3种双金属碳纳米管的结构和组成进行了表征,证明3种双金属均可得到碳纳米管结构.3种材料均表现出双功能电催化活性[氧还原反应(ORR)和氧析出反应(OER)];锌-空气电池(ZABs)性能测试结果表明,CuFe@NCNTs基ZABs具有最大的峰值功率密度(53 mW/cm^(2)),NiFe@NCNTs和CoFe@NCNTs基ZABs具有更好的倍率性能,3种双金属碳纳米管ZABs的循环稳定性均优于Pt/C-IrO_(2)ZABs.
With the development of human society,the problems of energy crisis and environmental pollution increase obviously.In order to face these problems,developing a series of new energy storage devices is significance.Zn-air batteries(ZABs)is one of high specific volume density and low cost storage devices,which has been studied extensively.In this study,three double metal-based carbon nanotubes(CuFe@NCNTs,NiFe@NCNTs and CoFe@NCNTs)were obtained by adding Cu,Ni and Co as heteroatoms during the preparation of Fe-based carbon nanotubes and were used as the oxygen electrodes for ZABs.Then,scanning electron microscope(SEM),N_(2) adsorption-desorption isotherms were used to characterize the microstructures of samples.X-ray diffraction(XRD),X-ray photo-electron spectroscopy(XPS)and Raman spectrum analysis were tested to confirm their chemical composition.The results show that carbon nanotubes could be synthesized successfully with all of three metal couples.However,the different metals doping nanotubes show the great difference on their morphologies and compositions.Cu elements doping shows the least influence on the structure of nanotubes.Besides,the chemical compositions and graphitization rations of carbon nanotubes were obviously changed after doped by all three heteroatoms.Simultaneously,thre double metal carbon nanotubes exhibit bifunctional electrocatalytic performances both in oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).CuFe@NCNTs shows the greatest performances for ORR[onse potential is 0.92 V(vs.RHE)and half-wave potential is 0.81 V(vs.RHE)]in three samples.NiFe@NCNTs shows th superior activities for OER(only a potential of 1.58 V is needed to reach a current density of 10 mA/cm^(2)),which i even better than that of IrO_(2).Among the three assembled ZABs,CuFe@NCNTs based ZABs demonstrate a peak power density of 53 mW/cm^(2),both of NiFe@NCNTs based ZABs and CoFe@NCNTs based ZABs show excellen discharge rate capabilities.All of three cells show great cycles lifetime longer than 150 h,outperform
作者
丁钦
张梓轩
徐培程
李晓宇
段莉梅
王寅
刘景海
DING Qin;ZHANG Zixuan;XU Peicheng;LI Xiaoyu;DUAN Limei;WANG Yin;LIU Jinghai(Inner Mongolia Key Laboratory of Carbon Nanomaterials,Nano Innovation Institute,College of Chemistry and Materials Science,Inner Mongolia Minzu University,Tongliao 028000,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第11期155-164,共10页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21961024,21961025,22161036)
内蒙古自然科学基金(批准号:2018JQ05,2019BS02007)
内蒙古自治区科技成果转化项目(批准号:CGZH2018156,2019GG261)
内蒙古民族大学博士启动基金(批准号:BS437)资助。
关键词
碳纳米管
过渡金属
双功能电催化剂
锌-空气电池
Carbon nanotubes
Transition metal
Bifunctional electrocatalysis
Zn-air battery
