铁磁性
尖晶石
磁化
分析化学(期刊)
材料科学
阴极
热液循环
外推法
磁矩
化学
凝聚态物理
磁场
冶金
地质学
物理化学
物理
数学分析
地震学
量子力学
色谱法
数学
作者
Zach Moorhead-Rosenberg,Dongwook Shin,Katharine R. Chemelewski,John B. Goodenough,Arumugam Manthiram
摘要
The magnetic properties of cation-disordered and cation-ordered LiMn1.5Ni0.5O4 spinel samples with different morphologies synthesized by hydrothermal and co-precipitation methods have been investigated. Extrapolation of the magnetization values measured below the ferrimagnetic ordering temperature to 0 K has been employed to quantitatively determine the Mn3+ content. The Mn3+ contents calculated on the basis of collinear spin ferrimagnetism from the extrapolated magnetic moment values at 0 K agree closely with those obtained from the capacity values in the 4 V region of lithium-ion cells. This study demonstrates that the magnetic method presented here could become a valuable tool to quantitatively determine the Mn3+ content in high-voltage spinel cathodes.
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