摘要
以酚醛树脂为炭前驱体、水热法合成的Fe_3O_4纳米微球为核,经研磨、干燥、炭化制备Fe_3O_4@C纳米核壳型微球。结果表明,包覆后的Fe_3O_4@C微球尺寸均匀且无团聚现象。碳包覆量影响着Fe_3O_4@C锂电池负极材料的电化学性能。20%为最佳包覆量,其首次放电比容量为984 mA·h/g,100次循环后放电比容量保持在413 mA·h/g。
The Fe304@C yolk shell microspheres were prepared by grinding, drying and carbonizing, in which Fe304 microspheres as core were prepared by hydrothermal method and phenolic resin was used as the carbon precursor. The obtained Fe304@C yolk shell microspheres had uniform diameter and no agglomeration. The mass percentage of carbon coating played an important role in improving electrochemical performance of Fe304@C as anode material for lithium ion battery. When the mass percentage of carbon coating was 20%, the Fe304@C yolk shell microspheres showed an optimum performance that first discharge capacity was 984 mA. h/ g and discharge capacity kept 413 mA.h/g after 100 cycles.
作者
李晓杰
马昌
马灿良
史景利
Li Xiao-jie;Ma Chang;Ma Can-liangz;Shi Jing-li(School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Shanxi University, Shanxi Taiyuan 030006, China)
出处
《炭素技术》
CAS
北大核心
2018年第2期23-26,36,共5页
Carbon Techniques
基金
国家自然科学基金项目(U1510134和51502201)
天津市自然科学基金项目(16JCQNJC06300)
