Research & Development

Preparation of spherical lithium iron phosphate material and its 18650 battery test

  • Lei Chen ,
  • Longtao Zhao ,
  • Zhenyu Chen ,
  • Guang Li
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  • School of Materials and Chemical Engineering,Henan University of Engineering,Zhengzhou 450007,China

Received date: 2019-02-19

  Online published: 2020-06-15

Abstract

A spherical lithium iron phosphate material LFP-1 was prepared by high-energy ball milling and spray drying,and the 18650 battery was fabricated to measure the compacted density of the electrode sheet.At the same time,a commercial lithium iron phosphate material LFP-2 was selected as a comparison.The test results showed that both LFP materials consist-ed of particles with an average particle size of 300~500 nm,a specific surface area of 13~15 m2/g and a carbon mass fraction of about 1.5%.The charge and discharge test of the CR2032 button battery showed that the specific discharge capacity of LFP-1 was approximately 165 mA·h/g at 0.2C,which was similar to that of commercial lithium iron phosphate material LFP-2.The results of the prepared 18650 cell showed that the highest compacted density of the electrode sheet prepared from the commercial lithium iron phosphate LFP-2 could reach 2.52 g/cm3,which was significantly higher than that 2.25 g/cm3 of the LFP-1,which may be related to the different particle size distribution of the material.

Cite this article

Lei Chen , Longtao Zhao , Zhenyu Chen , Guang Li . Preparation of spherical lithium iron phosphate material and its 18650 battery test[J]. Inorganic Chemicals Industry, 2019 , 51(8) : 25 -28 . DOI: 10.11962/1006-4990.2018-0551

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