Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling

Chang Sam Kim; Sung Ik Hwang; Shin Woo Kim

doi:10.4028/www.scientific.net/MSF.620-622.41

Paper Titles

Evaluations of Hydrogen Permeation on γ-Al₂O₃ Synthesized by Sol-Gel Process
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Porous TiO₂ Layer Encapsulated Silicon as the Anode Material for Lithium Secondary Batteries
p.29

Effect of SiC on Microstructures and Properties of Cordierite-Mullite Multiphase Ceramics Material
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Development of an Automated Design System for Oil Pumps with Multiple Profiles (Circle, Ellipse and Involute)
p.37

Electrochemical Properties of LiFePO₄/C Composite Improved by High Energy Milling
p.41

Research of BOF Protection Technology by Slag Splashing
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Study on Transition Characteristics of Poly(Ethylene Glycol)/ Selected Fatty Acids Phase Change Materials
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Preparation and Microstructural Characterization of Al₂O₃/ZrO₂ Nanocomposites to Use in the Femoral Head of Hip Replacement
p.53

Effects of Atomizing Gas on Microstructural Characteristics and Mechanical Properties of Spray Formed High Si Steels
p.57

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Electrochemical Properties of LiFePO₄/C Composite Improved by High Energy Milling

Abstract:

The electrochemical properties of LiFePO4 as a cathode of lithium ion batteries considerably depend on a particle size of LiFePO4 and a condition of carbon coating. In this study, LiFePO4 powders were prepared using ultrasonic spray pyrolysis method, and then LiFePO4/C composites were made by infiltrating sucrose solution into LiFePO4 powders, drying, high-energy milling and annealing. The effects of high-energy milling were analyzed by comparing with electrochemical properties of powders synthesized without high-energy milling. It was found that the milling process drastically reduced the particle size of synthesized powders and electrical conductivity, and improved discharge capacity, cycle stability and rate performance.