Low temperature ordering of spinel LNMO cathode material

Long term cycling stability and high energy and power density are key characteristics for battery materials, especially for applications within the field of electric vehicles. LNMO is an interesting candidate material due to its high energy and power density. Depending on the ordering of the atoms within LNMO (mainly Ni and Mn), the material can adopt two different structures. This subtle difference in atomic arrangement leads to differences in the electrochemical behavior, e.g. in the long term cycling stability, where the ordered structure reaches its end of life first. The proposed study aims to investigate the driving force for ordering to occur in LNMO and will be helpful for improving the long term cycling stability of the material in battery applications.

长循环稳定性与高能量密度、功率密度是电池材料的核心性能指标，在电动汽车领域的应用中尤为关键。LNMO是一类极具潜力的候选电池材料，因其兼具高能量密度与功率密度。LNMO内部的原子有序排布（主要为镍与锰原子）存在差异时，该材料可呈现两种不同的晶体结构。原子排布上的细微差异会引发电化学性能的分化，例如在长循环稳定性方面，有序构型的LNMO会率先达到服役寿命终点。本研究旨在探究LNMO中原子有序排列的形成驱动力，其研究成果将有助于优化该材料在电池应用中的长循环稳定性。