Using electrodes with multiple types of active materials has been shown to be a promising approach to improve critical properties of Li-ion batteries, such as cost, lifetime, safety, and rate performance and is already applied in automotive applications. However, the impact of the type and content of components in the blend is still poorly understood, making it difficult to identify the most beneficial compositions and designs. The present work systematically investigates how specific electrochemical properties of the components affect the resulting electrochemical kinetics and thermodynamics of blended electrodes. The impact of component type and mass ratio on the voltage and entropy profiles, charge transfer kinetics, and lithium diffusivity is examined by thermodynamic analyses, galvanostatic titration, impedance spectroscopy, and chronoamperometry. Comparison of the results with models based on physical mixtures shows that the basic electrochemical properties of the blended electrodes correspond to expectations based on the components’ properties. Based on the present findings, direct mixing effects can be ruled out for future simulations and model-based design studies to effectively search for optimal compositions and electrode structures.

使用具有多种活性材料的电极已被证明是改善锂离子电池关键特性（例如成本、寿命、安全性和倍率性能）的一种很有前景的方法，并且已经应用​​于汽车应用。然而，混合物中成分的类型和含量的影响仍然知之甚少，因此很难确定最有益的成分和设计。目前的工作系统地研究了组件的特定电化学性质如何影响混合电极的电化学动力学和热力学。通过热力学分析、恒电流滴定、阻抗谱和计时电流法。将结果与基于物理混合物的模型进行比较表明，混合电极的基本电化学特性符合基于组件特性的预期。基于目前的研究结果，未来的模拟和基于模型的设计研究可以排除直接混合效应，以有效地寻找最佳成分和电极结构。