Facile preparation of porous LiFePO4/C composite granules by mechanical process
Facile preparation of porous LiFePO4/C composite granules by mechanical process
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DOI：
10.1016/j.matchemphys.2015.02.038
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发表时间：
2015-04-01
影响因子：
4.6
通讯作者：
Naito, Makio
中科院分区：
文献类型：
--
作者：
Kozawa, Takahiro;Kataoka, Noriaki;Naito, Makio
磷酸铁锂（LiFePO 4）是一种很有前途的锂离子电池正极材料，为了提高其电化学性能和能量密度，需要对其进行颗粒细化、碳包覆和造粒。此外，它们的复合颗粒需要多孔结构以帮助液体电解质的渗透。在这里，我们报告了一个简单的制备多孔LiFePO 4/C复合颗粒的机械方法，使用一个磨损型磨。通过对原料进行机械处理，在不需要气氛控制和外部加热的情况下，一步合成了平均孔径为20-30 nm的LiFePO 4/C复合颗粒。这种简单的机械技术不需要额外的成孔剂。根据电池测试，表现出良好的循环性能。(C)2015 Elsevier B. V.版权所有。
Lithium iron phosphate (LiFePO4) which is a promising cathode material for lithium-ion batteries requires particle size reduction, carbon coating and granulation to improve its electrochemical performances and increase the energy densities. In addition, their composite granules desire a porous structure in order to assist the penetration of liquid electrolyte. Here, we report a facile preparation of porous LiFePO4/C composite granules by a mechanical method using an attrition-type mill. By the mechanical treatment of starting materials, LiFePO4/C composite granules with an average pore size of 20-30 nm were synthesized in one-step process without atmosphere control and external heating. This simple mechanical technique does not require additional pore forming agents. According to the cell tests, a favorable cycle performance was exhibited. (C) 2015 Elsevier B.V. All rights reserved.