Electrochemical properties of chemically modified phosphoolivines as cathode materials for Li-ion batteries

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• 作者：Andrzej Kulka ; Dominika Baster ; Micha? Dudek ; Micha? Kie?basa ; Anna Milewska ; Wojciech Zaj?c ; Konrad ?wierczek ; Janina Molenda
• 关键词：LiFePO4 ; Doping ; Cathode materials ; Electrochemical properties ; Chemical stability
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 December, 2013
• 年：2013
• 卷：244
• 期：Complete
• 页码：565-569
• 全文大小：1332 K

文摘

Li-site, Fe-site and P-site substituted LiFePO₄ phosphoolivines were synthesized and examined in terms of crystal structure, electrical conductivity, charge-discharge performance in Li/Li⁺/LiFePO₄-type cells, as well as chemical stability against the LiPF₆-EC-DEC electrolyte. Despite possible improvement of electrical conductivity of the substituted phosphoolivines, it seems that the optimization of morphology and reduction of grain size is the most efficient way of improvement of electrochemical performance of LiFePO₄, while chemical stability of the substituted materials remains high.