- Synthesis and Electrochemical Performance of Li2MnSiO4 for Lithium Ion Battery Prepared by Amorphous Silica Precusor
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Yun-Ho Jin, Kun-Jae Lee, Lee-Seung Kang, Hang-Chul Jung, Hyun-Seon Hong
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J Korean Powder Metall Inst. 2012;19(3):210-214.
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DOI: https://doi.org/10.4150/KPMI.2012.19.3.210
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 Abstract
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- Mass production-capable Li_2MnSiO_4 powder was synthesized for use as cathode material in state-of-the-art lithium-ion batteries. These batteries are main powder sources for high tech-end digital electronic equipments and electric vehicles in the near future and they must possess high specific capacity and durable charge-discharge characteristics. Amorphous silicone was quite superior to crystalline one as starting material to fabricate silicone oxide with high reactivity between precursors of sol-gel type reaction intermediates. The amorphous silicone starting material also has beneficial effect of efficiently controlling secondary phases, most notably Li_xSiO_x. Lastly, carbon was coated on Li_2MnSiO_4 powders by using sucrose to afford some improved electrical conductivity. The carbon-coated Li_2MnSiO_4 cathode material was further characterized using SEM, XRD, and galvanostatic charge/discharge test method for morphological and electrochemical examinations. Coin cell was subject to 1.5-4.8 V at C/20, where 74 mAh/g was observed during primary discharge cycle.
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