摘要
针对草酸亚铁负极材料循环稳定性差的问题,采用简单的溶剂热法,通过控制表面活性剂种类,分别用可控的合成得到了两种不同形貌结构的草酸亚铁,并进一步考察了材料的储锂能力。结果表明,表面活性剂可以改变材料颗粒晶面亲水和疏水的相互作用,进而影响材料颗粒形貌和结构稳定性。基于颗粒完整的长杆状结构、N-甲基-2-吡咯烷酮条件下合成得到的草酸亚铁材料表现出更为优异的倍率和循环性能,在1、3、5C电流密度下循环50次后,仍有585.18、551.39和539.07 mA·h/g的放电比容量。
In view of the poor cycling stability and performance,the iron oxalate anode materials with different morphologies were controllably fabricated via a simple solvothermal method by adjusting surfactants.The lithium storage capacity of these materials was further examined.The results show that the surfactant could regulate effectively the hydrophobic interlamination interactions and interconnection between surfactant and crystallographic planes,then causing a change in the morphology and structure.Based on the integrality and stability of long rod structure,the iron oxalate synthesized under N-Methyl-2-pyrrolidone condition suggests satisfactory rate capability and superior long-term stability(the reversible specific capacity of 585.18,551.39 and 539.07 mA·h/g after 50 cycles at 1,3 and 5C,respectively).
作者
张克宇
高耕
王倩雯
戴永年
姚耀春
李永佳
ZHANG Keyu;GAO Geng;WANG Qianwen;DAI Yongnian;YAO Yaochun;LI Yongjia(National Engineering Laboratory for Vacuum Metallurgy,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgy and Mining,Kunming Metallurgy College,Kunming 650093,China)
出处
《有色金属工程》
CAS
北大核心
2021年第1期1-6,共6页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(52064031)
云南省自然科学基金(2018HB012)
博士科研启动基金(XXRCXM201701)。
关键词
草酸亚铁
可控制备
负极材料
锂离子电池
iron oxalate
controlled fabrication
anode materials
lithium-ion batteries
