Size and shape control of LiFePO4 nanocrystals for better lithium ion battery cathode materials
Size and shape control of LiFePO4 nanocrystals for better lithium ion battery cathode materials
复制标题
LiFePO4纳米晶的尺寸和形状控制以获得更好的锂离子电池正极材料
DOI：
10.1007/s12274-013-0324-8
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发表时间：
2013-07-01
期刊：
影响因子：
9.9
通讯作者：
Li, Yadong
中科院分区：
文献类型：
--
作者：
Nan, Caiyun;Lu, Jun;Li, Yadong
摘要磷酸铁锂（LiFePO 4）是一种潜在的高效锂离子电池正极材料，但由于其电导率低、锂离子扩散通道单一等特点，在合成过程中需要对材料的粒径和形貌进行控制。本文以乙二醇为溶剂，成功地合成了六种不同尺寸和形状的LiFePO 4纳米晶。Fe-PO_4-Li的加入顺序有助于形成{010}面大部分暴露的LiFePO_4纳米晶体，并且增加LiOH的量导致颗粒尺寸减小。六种不同的LiFePO 4颗粒的电化学性能表明，最有前途的LiFePO 4纳米晶体具有主要的{010}面暴露或高比表面积，几乎没有铁（II）氧化。
AbstractLithium iron phosphate (LiFePO4) is a potential high efficiency cathode material for lithium ion batteries, but the low electronic conductivity and single diffusion channel for lithium ions require good particle size and shape control during the synthesis of this material. In this paper, six LiFePO4 nanocrystals with different size and shape have been successfully synthesized in ethylene glycol. The addition sequence Fe-PO4-Li helps to form LiFePO4 nanocrystals with mostly {010} faces exposed, and increasing the amount of LiOH leads to a decrease in particle size. The electrochemical performance of the six distinct LiFePO4 particles show that the most promising LiFePO4 nanocrystals either have predominant {010} face exposure or high specific area, with little iron(II) oxidation.