Dataset of "Thermal Stability of Valuable Metals in Lithium-Ion Battery Cathode Materials: Temperature Range 500-800 °C"

Examination of the cathode part of a lithium-ion battery, which is composed of NMC spinel 622 (LiNi0.6Mn0.2Co0.2O2), and investigation of its stability during annealing at temperatures ranging from 500-800 °C. Determination of valuable metals (Li, Ni, Mn and Co) after exposure to temperatures from 500 to 800 °C using ICP-OES analysis. The correlation between element stability and the temperature of PVDF release, a binder in cathodes, was demonstrated by DTA. SEM-EDS performed local chemical analysis. XRD characterised the crystalline structures of the original material and changes after annealing at 800 °C. This work builds on Part I, which focusses on the thermal stability of the material in lower temperature ranges. This research aimed to gain a deeper understanding of the pyrometallurgical aspect of the recycling process and identify the ideal annealing temperature for maximising the recovery of valuable metals.本研究针对由镍锰钴尖晶石622（NMC spinel 622，化学式LiNi₀.₆Mn₀.₂Co₀.₂O₂）制备的锂离子电池正极材料展开分析，并探究其在500~800℃退火过程中的热稳定性。采用电感耦合等离子体发射光谱法（ICP-OES）对经500~800℃高温处理后的有价金属（锂、镍、锰、钴）含量进行定量测定；通过差热分析（DTA）阐明了正极粘结剂聚偏氟乙烯（PVDF）的脱除温度与各元素稳定性之间的关联；借助扫描电镜能谱联用技术（SEM-EDS）完成局部化学组分分析；利用X射线衍射（XRD）表征了原始材料的晶体结构以及经800℃退火后的结构变化。本研究接续第一部分的工作，后者聚焦于该材料在低温区间内的热稳定性。本研究旨在深入理解锂离子电池回收流程中的火法冶金环节，并确定可实现有价金属最大化回收的最优退火温度。