Nanoscale strain mapping in battery nanostructures
- Department of Physics, University of California-San Diego, La Jolla, California 92093-0319 (United States)
- Department of NanoEngineering, University of California-San Diego, La Jolla, California 92093-0448 (United States)
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Manuel Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Coherent x-ray diffraction imaging is used to map the local three dimensional strain inhomogeneity and electron density distribution of two individual LiNi{sub 0.5}Mn{sub 1.5}O{sub 4−δ} cathode nanoparticles in both ex-situ and in-situ environments. Our reconstructed images revealed a maximum strain of 0.4%. We observed different variations in strain inhomogeneity due to multiple competing effects. The compressive/tensile component of the strain is connected to the local lithium content and, on the surface, interpreted in terms of a local Jahn-Teller distortion of Mn{sup 3+}. Finally, the measured strain distributions are discussed in terms of their impact on competing theoretical models of the lithiation process.
- OSTI ID:
- 22283293
- Journal Information:
- Applied Physics Letters, Vol. 104, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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