锂离子电池正极材料LiMn0.8-xFe0.15+xMg0.05PO4的制备、表征及电化学过程研究

戴仲葭

化工新型材料 ›› 2018, Vol. 46 ›› Issue (9) : 198 -201.

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化工新型材料 ›› 2018, Vol. 46 ›› Issue (9) : 198-201.
科学研究

锂离子电池正极材料LiMn0.8-xFe0.15+xMg0.05PO4的制备、表征及电化学过程研究

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Synthesis,characterization and electrochemical process of LiMn0.8-xFe0.15+xMg0.05PO4 anode material for lithium ion battery

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摘要

采用溶剂热法制备了Mg掺杂的磷酸铁锰锂(LiMn0.8-xFe0.15+xMg0.05PO4)正极材料。通过X射线衍射、扫描电子显微镜、恒流充放电等手段对合成样品的结构、形貌及电化学性能进行了测试与表征。结果表明,所制样品为具有良好橄榄石型结构的纳米颗粒。Mg的掺入提升了材料中Mn和Fe的容量发挥率,0.1C倍率下材料的容量提升率达23.2%,1C倍率时循环100周后材料比容量为110.1mAh/g,容量保持率高于94%。

Abstract

LiMn0.8-xFe0.15+xMg0.05PO4 anode material was synthesized by the solvothermal method.The structure,morphology and electrochemical properties of as-prepared samples were characterized by XRD,SEM and galvanostatic charge and discharge process.The results showed that samples were nano particles with olivine-type structure.Mg doping improved capacity rate of Mn and Fe,promoted by 23.2% at 0.1C.Specific capacity after 100 cycles at 1 C was 110.1mAh/g with retention rate of more than 94%.

关键词

锂离子电池 / LiMn0.8-xFe0.15+xMg0.05PO4 / 电化学过程

Key words

lithium ion battery / LiMn0.8-xFe0.15+xMg0.05PO4 / electrochemical process

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戴仲葭. 锂离子电池正极材料LiMn0.8-xFe0.15+xMg0.05PO4的制备、表征及电化学过程研究[J]. 化工新型材料, 2018, 46(9): 198-201 DOI:

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