摘要
本工作以四水合醋酸镍和二氰二胺为原料,利用简单热解法制备出镍金属与氮元素共掺杂型碳纳米管状材料。借助扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射测试(XRD)、X射线光电子能谱测试(XPS)、氮气吸脱附测试(BET-BJH)和电化学技术等表征手段,对比分析了商业化碳纳米管(CNT)、商业化氮掺杂碳纳米管(NCNT)和镍-氮掺杂型碳纳米管(Ni-NCNT)三种电极活性材料的形貌、结构和电化学性能。结果表明,Ni-NCNT材料拥有中空管状结构,比表面达160.75 m^(2)·g^(-1),电极循环250次后,容量依旧保持在306 mAh·g^(-1),不同倍率测试后继续循环1000次,容量仍保持为100.3 mAh·g^(-1),循环性能与倍率性能均优于CNT和NCNT,该材料在钠离子电池负极领域中拥有巨大的应用前景。
In this work, nickel metal and nitrogen element co-doped carbon nanotubes were prepared by a simple pyrolysis method. With the aid of characterization methods, such as scanning electron microscope(SEM), transmission electron microscope(TEM), X-ray diffraction test(XRD), X-ray photoelectron spectroscopy test(XPS), nitrogen adsorption/desorption test(BET-BJH) and electrochemical measurement techniques, commercial carbon tube(CNT), commercial nitrogen-doped carbon nanotubes(NCNT) and nickel-nitrogen co-doped carbon nanotubes(Ni-NCNT) were characterized. The results show that the specific surface of Ni-NCNT materials with hollow structure is 160.75 m^(2)·g-1. After 250 cycles, the capacity remains in 306 mAh·g-1. After continuing 1 000 cycles with different rate tests, the capacity remains 100.3 mAh·g-1. The cycle and rate performance are better than those of CNT and NCNT. In the field of sodium-ion batteries, the material has great application prospect.
作者
刘婷婷
叶翰章
李佳妮
倪敏
孔佳
王学东
顾海东
LIU Ting-ting;YE Han-zhang;LI Jia-ni;NI Mi;KONG Jia;WANG Xue-dong;GU Hai-dong(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou Jiangsu 215009;Jiangsu Key Laboratory of Environmental Science and Engineering,Suzhou Jiangsu 215009)
出处
《电子显微学报》
CAS
CSCD
北大核心
2021年第3期228-233,共6页
Journal of Chinese Electron Microscopy Society
基金
科技部国家重点研发计划(No.2017YFC0211903)
2018年苏州科技局科技发展项目(科技创新政策资助性资助)。
