[100]-Oriented LiFePO4 Nanoflakes toward High Rate Li-Ion Battery Cathode

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• 作者：Zhaojin Li ; Zhenzhen Peng ; Hui Zhang ; Tao Hu ; Minmin Hu ; Kongjun Zhu ; Xiaohui Wang
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：16
• 期：1
• 页码：795-799
• 全文大小：410K
• ISSN：1530-6992

文摘

[100] is believed to be a tough diffusion direction for Li⁺ in LiFePO₄, leading to the belief that the rate performance of [100]-oriented LiFePO₄ is poor. Here we report the fabrication of 12 nm-thick [100]-oriented LiFePO₄ nanoflakes by a simple one-pot solvothermal method. The nanoflakes exhibit unexpectedly excellent electrochemical performance, in stark contrast to what was previously believed. Such an exceptional result is attributed to a decreased thermodynamic transformation barrier height (Δμ_b) associated with increased active population.