A hydrothermal method was used to synthesize LiFePO₄ to explore the effect of the rate of addition of the Li⁺ precursor to a mixture of the Fe²⁺ and PO₄³⁻ precursors. Both the average and local structures were investigated using powder X-ray diffraction, Mössbauer spectroscopy and X-ray absorption spectroscopy. Slower addition rates led to increased oxidation of Fe²⁺ to Fe³⁺ despite purging all solutions constantly, as well as increased defects. The local structure as determined by extended X-ray absorption fine structure displayed far less variation between the samples. The formation of a Li₃PO₄ impurity appeared to be independent of the Li⁺ addition rate.

中文翻译：

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水热合成LiFePO4过程中Li+添加率对平均和局部结构的影响

使用水热法合成 LiFePO _{4以探索 Li} ^{+前驱体添加到 Fe 2+}和 PO ₄ ^3-前驱体的混合物中的速率的影响。使用粉末 X 射线衍射、穆斯堡尔光谱和 X 射线吸收光谱研究了平均结构和局部结构。较慢的添加速率导致 Fe ²⁺向 Fe ³⁺的氧化增加，尽管不断地吹扫所有溶液，并且缺陷增加。由扩展的 X 射线吸收精细结构确定的局部结构显示样品之间的差异要小得多。_{Li 3} PO ₄的形成^{杂质似乎与 Li +}添加率无关。