Effects of Ball Milling on the Electrochemical Performance of Li2FeSiO4 Cathode

Asmalina Mokhtar; Mohamad Izha Ishak; Siti Munirah Hasanaly

doi:10.4028/www.scientific.net/AMR.879.16

Paper Titles

Foreword, Message from Chairman of the Organizing Committee, Organizing Committee and Sponsors

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Physical and Mechanical Properties of WC-Co Submicron Powders Using P/M Technique
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Effects of Ball Milling on the Electrochemical Performance of Li₂FeSiO₄ Cathode
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Physical, Mechanical and Electrical Properties of W-20 wt.% Cu Composite Produced by Liquid Phase Sintering Process
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Optimization of TiAlN Coatings on HSS Inserts by Physical Vapour Deposition Process Using Taguchi Technique
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Structural and Photoluminescence Properties of Co-Doped ZnO Nanorods Prepared by RF-Magnetron Sputtering
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Characteristic and Corrosion Studies of Rare Earth (Ree) Based Anodizing on AZ91D Magnesium Alloy
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 879Effects of Ball Milling on the Electrochemical...

Effects of Ball Milling on the Electrochemical Performance of Li₂FeSiO₄ Cathode

Abstract:

The Li₂FeSiO₄cathode materialwas prepared via a solid state reaction method and subsequently heat treated at around 350°C and 700^OC in Ar₂ atmosphere. High energy ball milling method is applied on the resulting powder with carbon additives to further modify the structure and to enhance the electrochemical performance. The structure and morphology of the prepared Li₂FeSiO₄powder was characterized by means of X-Ray Diffractometry (XRD) and Field-Emission Scanning Electron Microscope (FESEM). The morphological changes of the Li₂FeSiO₄resultedfrom different ball milling duration strongly influences the electrochemical performance of this cathode material_.The Li₂FeSiO₄powder which was ball-milled for 48h delivered in the best electrochemical performance with a discharge capacity of 65.4 mAh/g when cycled between 1.5 and 4.8V vs. Li/Li⁺. Particulate morphology observed from FESEM images showed that samples that were ball-milled for 48h have reduced agglomeration compared to that ball-milled for 24h. The larger surface area for reaction with Li⁺ improves the discharge capacity of the Li₂FeSiO₄cathode material.