LiFePO4 Nanocrystals: Liquid-Phase Reduction Synthesis and Their Electrochemical Performance

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• 作者：Jie Jiang ; Wen Liu ; Jitao Chen ; Yanglong Hou
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：June 27, 2012
• 年：2012
• 卷：4
• 期：6
• 页码：3062-3068
• 全文大小：394K
• 年卷期：v.4,no.6(June 27, 2012)
• ISSN：1944-8252

文摘

Nanosized LiFePO₄ is a kind of promising material for high performance lithium ion batteries; however, the synthesis of nanosized LiFePO₄ still has some challenges in forming an orthorhombic phase in atmospheric liquid phase and protecting the LFP nanoparticles from aggregation, etc. In this work, LiFePO₄ nanocrystals were synthesized through a high-temperature (350 掳C) liquid-phase reduction method. The size and morphology of nanocrystals can be readily controlled by tuning the ratio of solvents, and the size-dependent behavior of lithium storage performance is also observed. After a carbon-coating surface treatment, rhombic-shaped LiFePO₄ nanocrystals display excellent lithium storage properties with high reversible capacities and good cycle life (141.0 mAh g^鈥? at 0.5 C after 50 cycles etc.). This method can be extended to prepare LiMnPO₄ nanorods by substituting iron source with manganese salt.

Keywords:

lithium iron phosphate; liquid-phase reduction process; electrochemical performance