Transition metal-based high entropy oxides (TM-HEO) have recently been gaining interest for their potential use as anodes in next-generation Li-ion batteries. In such systems, however, the lithiation/delithiation mechanisms remain a matter of ongoing investigation. In this work we demonstrate the suitability of Multivariate Curve Resolution (MCR) of operando X-ray absorption spectroscopy (XAS) data to study the lithiation mechanisms in the TM-HEO (Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)O. Through the MCR analysis, the number, nature and concentration evolution as a function of stored charge of all Cu-, Ni- and Co-related active species present during the first lithiation cycle is obtained.

基于过渡金属的高熵氧化物（TM-HEO）最近因其在下一代锂离子电池中作为阳极的潜在用途而受到关注。然而，在这样的系统中，锂化/去锂化机制仍然是正在进行的研究的问题。在这项工作中，我们证明了操作X射线吸收光谱（XAS）数据的多元曲线分辨率（MCR）适于研究TM-HEO（Mg _0.2 Co _0.2 Ni _0.2 Cu _0.2 Zn _0.2）O中的锂化机理。通过MCR分析，可以获得在第一个锂化周期中存在的所有与Cu，Ni和Co相关的活性物种的数量，性质和浓度随存储电荷的变化的函数。