锰酸锂材料电池表观活化能的数学分析

Mathematical analysis of activation energy of lithium manganate battery performance

采用差热分析法研究了不同升温速率下锰酸锂前驱体所发生的分解反应,通过Kissinger法和Doyle Ozawa法对不同反应阶段的活化能进行计算,同时通过扫描电镜、粒度分析仪、X射线衍射仪对所得样品的微观形貌进行观察分析,结果表明,通过共沉淀法与煅烧法相结合制备所得LiMn_2O_4的物相纯净,粒度分布均匀,形貌规整。

The decomposition reaction of lithium manganese oxide precursor at different heating rates was studied by differential thermal analysis.The activation energies of different reaction stages were calculated by Kissinger method and DoyleOzawa method.The microstructure of the samples was observed and analyzed by scanning electron microscope,particle size analyzer and X-ray diffraction.The results show that the LiMn2O4 prepared by the co precipitation method and the calcination method are pure,the particle size distribution is uniform,and the morphology is regular.