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Title: Nanoscale strain mapping in battery nanostructures

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.
Authors:
; ; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5]
  1. Department of Physics, University of California-San Diego, La Jolla, California 92093-0319 (United States)
  2. Department of NanoEngineering, University of California-San Diego, La Jolla, California 92093-0448 (United States)
  3. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  4. Manuel Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  5. (United States)
Publication Date:
OSTI Identifier:
22283293
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; CATHODES; ELECTRON DENSITY; JAHN-TELLER EFFECT; LITHIUM COMPOUNDS; MANGANATES; MANGANESE IONS; NANOSTRUCTURES; NIOBIUM COMPOUNDS; PARTICLES; STRAINS; SURFACES; THREE-DIMENSIONAL CALCULATIONS; X-RAY DIFFRACTION