Synthesis and electrochemical properties of nanostructured Li₂FeSiO₄/C cathode material for Li-ion batteries

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• 作者：Kinson C. Kam^a ; Torbjö ; rn Gustafsson^a ; John O. Thomas ; ^a ; ^{josh.thomas@mkem.uu.se"" rel=""nofollow}
• 关键词：Lithium-ion battery ; Iron silicate ; Synthesis ; Characterization ; Electrochemistry
• 刊名：Solid State Ionics
• 出版年：2011
• 出版时间：16 June 2011
• 年：2011
• 卷：192
• 期：1
• 页码：356-359
• 全文大小：852 K

文摘

Nanostructured Li₂FeSiO₄/C was synthesized by high-energy ball-milling and the amorphous citrate-assisted techniques. Similar redox behaviour is observed for samples prepared by the amorphous citrate-assisted route followed by a 4 h heat treatment: 0.3 V polarization and more sloping behaviour was observed when cycling between 2.0 V and 3.7 V at 60 °C; lower capacity fade is also observed compared to Li₂FeSiO₄/C prepared by the solid-state reaction technique. A discharge capacity of 102 mA h g^− 1 is obtained for samples prepared by the high-energy ball-milling method, while capacities decrease from 95 to 77 mA h g^− 1 using the amorphous citrate method for heat-treatment times increasing successively from 4 h to 18 h.