Three‐stage kinetics of laser‐induced LiFePO4 decomposition,Journal of Raman Spectroscopy

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Three‐stage kinetics of laser‐induced LiFePO4 decomposition
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2019-12-02 , DOI: 10.1002/jrs.5803
Alexander A. Ryabin ₁ , Boris N. Slautin ₁ , Dmitry V. Pelegov ₁

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This paper reports about new insight into a problem of a laser–matter interaction during Raman probing of lithium iron phosphate (LiFePO₄), discusses phase transformation kinetics in powder samples, and provides some methodological recommendations. LiFePO₄ is the second most popular positive electrode material in the global lithium battery industry, but the use of Raman spectroscopy for its structural characterization is hampered by the laser‐induced degradation. The statistical/big‐data approach to Raman spectra measurements is utilized to revise the problem and suggest a simple model of laser‐induced phase transformations in powder LiFePO₄. The results are proposed to be used for better understanding of the physics and chemistry of other processes taking place in electrochemical cells, namely, lithiation/delithiation and thermal stability/safety studies. Simple recommendations for nondestructive LiFePO₄ characterization by Raman spectroscopy are formulated.

中文翻译：

激光诱导的LiFePO4分解的三阶段动力学

本文报道了有关磷酸铁锂（LiFePO ₄）拉曼探测过程中激光与物质相互作用问题的新见解，讨论了粉末样品中的相变动力学，并提供了一些方法学建议。LiFePO ₄是全球锂电池行业中第二大最受欢迎的正极材料，但是由于激光诱导的降解，阻碍了拉曼光谱技术的结构表征。利用拉曼光谱测量的统计/大数据方法修正了这一问题，并提出了一种粉末状LiFePO ₄中激光诱导的相变的简单模型。建议将结果用于更好地理解电化学电池中发生的其他过程的物理和化学，即锂化/脱锂和热稳定性/安全性研究。提出了通过拉曼光谱表征无损LiFePO _4的简单建议。

更新日期：2019-12-02

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