Enhanced electrochemical performance of <30&#xa0;nm thin LiMnPO₄ nanorods with a reduced amount of carbon as a cathode for lithium ion batteries

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• 作者：Nam Hee Kwon ; ^{namhee.kwon@unifr.ch} ; Katharina M. Fromm ^{katharina.fromm@unifr.ch}
• 关键词：Li-ion batteries ; LiMnPO4 ; < ; 30&#xA0 ; nm nanoparticle ; Surfactant ; Carbon
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 May, 2012
• 卷：69
• 期：Complete
• 页码：38-44
• 文件大小：1488 K

摘要

5-10&#xA0;nm thin rod shaped LiMnPO₄ nanoparticles are synthesized by an improved thermal decomposition method. The synthesis parameters such as the concentration of surfactants, reaction temperature and time, as well as the presence of a solvent play a critical role in the formation of spherical, thin or thick nanorods, and needle-shaped particles of LiMnPO₄. A washing procedure to efficiently eliminate the surfactants attached to the surface of LiMnPO₄ nanoparticles is presented, avoiding thermal treatment at high temperatures. A nanocomposite LiMnPO₄ electrode provides a discharge capacity of 165 mAh/g at 1/40 C and 66 mAh/g at 1 C with only 10 wt%of total carbon additive. The characteristics of as-synthesized and low amount of carbon coated LiMnPO₄ are described as well as their electrochemical properties.