Revealing mechanistic processes in Na-NiCl2 batteries

With the move to electrify energy distribution in worldwide and with significant interest worldwide in development of "beyond lithium" technologies, there is increasing focus on alternative battery chemistries. One such chemistry is the Na-NiCl2 system with a Nasicon solid electrolyte. In this technology, developed for larger scale energy storage solutions, the cells operate at elevated temperatures, and are supported on a metallic substrate. This morphology presents challenges in undertaking analysis of the key electrochemical processes occurring at, or near, to the electrode/electrolyte interfaces. Using Bragg edge tomography we will be able to reveal key mechanistic processes from a series of pristine, charged and discharged cells that will be correlated with the electrochemical data obtained ex-situ.

随着全球能源分配向电气化转型，以及世界范围内对"超越锂"技术开发的浓厚兴趣，人们对替代电池化学体系的关注日益增加。钠-氯化镍（Na-NiCl₂）体系便是其中一种，它采用Nasicon型固体电解质。该技术专为大规模储能解决方案开发，电池单元在高温下运行，并依托于金属基底支撑。这种形态结构为分析电极/电解质界面处或其附近发生的关键电化学过程带来了挑战。通过布拉格边缘断层扫描技术（Bragg edge tomography），我们能够从一系列原始状态、充电态和放电态的电池单元中揭示关键机制过程，并将其与非原位获取的电化学数据相关联。