CALCINED REACTION TEMPERATURE OF NMC WITH IN-SITU XRD

Introduction

Solid-phase reactions, for example, calcination during synthesis of cathode materials, can be analyzed by performing in-situ XRD measurements during heating. The in-situ measurements make use of a single heating run rather than multiple batch sampling as required for offline analysis. The raw materials of Co₃O₄, NiO, Li₂(CO₃), and MnO₂ were mixed and then analyzed in-situ using XRD while heating the sample. From the XRD profiles, it was found that a calcination process started at 600°C, and pure NMC cathode material was obtained at 1000°C. Using in-situ XRD during heating, phase transition processes can be observed continuously without batch sampling at each temperature.

Observation of synthesis reaction for cathode material by in-situ XRD measurements during heating