One-step synthesis of B and N co-doped carbon nanotubes for high-stability lithium-ion batteries  

作　　者：Huan Huan Tian Chengxiang Wang Shuangyue Feng Qingyi Deng Hongxiang Xiang Xia Zu Xiaotao 

机构地区：[1]School of Physics,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China [3]Institute of Carbon Neutrality and New Energy,School of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,China [4]School of Materials Science and Engineering,The University of New South Wales,Sydney 2052,Australia

出　　处：《Nanotechnology and Precision Engineering》2024年第4期38-46,共9页纳米技术与精密工程(英文)

摘　　要：Creating adsorption sites by doping heteroatoms into the graphitic structures of carbon electrodes is an effective strategy for improving lithium storage in lithium-ion batteries.In this work,we prepared carbon nanotubes with controllable morphology and controllable nitrogen-doping level by a one-step pyrolysis method through adjusting the amount of urea used during synthesis.Under the synergistic effects of high temperature and Ni-catalyst migration,the carbon nanosheets generated by pyrolysis become coiled into tube-like structures.Characterization using Raman and x-ray photoelectron spectroscopy revealed that the B and N atoms were successfully co-doped into the resultant carbon nanotubes.When the obtained materials were used as lithium-ion battery anodes,reversible specific capacities of 337.11 and 187.62 mA h g^(−1) were achieved at current densities of 100 and 2000 mA g^(−1),respectively.Moreover,a capacity of 140.53 mA h g^(−1) was retained after 2000 cycles at a current density of 2000 mA g^(−1).The mechanism of lithium storage in these carbon materials was elucidated using cyclic voltammetry tests.Regarding other functional applications,the synthesized composite carbon nanotube material could also be used in other energy-storage battery systems,such as in the sulfur-carrying structures of lithium-sulfur batteries and in the three-dimensional porous structures of sodium batteries.

关 键 词：Carbon nanotubes DOPING One-step pyrolysis High stability Lithium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]