Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4722927
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- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy [DE-AC02-05CH11231, 6805918]
- National Science Foundation Materials Interdisciplinary Research Team (MIRT) [DMR-1122603]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1122603] Funding Source: National Science Foundation
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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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4722927]
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