Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy
Abstract
© 2017 The Author(s). Understanding the reaction pathway and kinetics of solid-state phase transformation is critical in designing advanced electrode materials with better performance and stability. Despite the first-order phase transition with a large lattice mismatch between the involved phases, spinel LiMn 1.5 Ni 0.5 O 4 is capable of fast rate even at large particle size, presenting an enigma yet to be understood. The present study uses advanced two-dimensional and three-dimensional nano-Tomography on a series of well-formed Li x Mn 1.5 Ni 0.5 O 4 (0≤x≤1) crystals to visualize the mesoscale phase distribution, as a function of Li content at the sub-particle level. Inhomogeneity along with the coexistence of Li-rich and Li-poor phases are broadly observed on partially delithiated crystals, providing direct evidence for a concurrent nucleation and growth process instead of a shrinking-core or a particle-by-particle process. Superior kinetics of (100) facets at the vertices of truncated octahedral particles promote preferential delithiation, whereas the observation of strain-induced cracking suggests mechanical degradation in the material.
- Authors:
-
[3];
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Donghua Univ., Shanghai (China)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- OSTI Identifier:
- 1347552
- Alternate Identifier(s):
- OSTI ID: 1379708
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; energy; imaging studies
Citation Formats
Kuppan, Saravanan, Xu, Yahong, Liu, Yijin, and Chen, Guoying. Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy. United States: N. p., 2017.
Web. doi:10.1038/ncomms14309.
Kuppan, Saravanan, Xu, Yahong, Liu, Yijin, & Chen, Guoying. Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy. United States. https://doi.org/10.1038/ncomms14309
Kuppan, Saravanan, Xu, Yahong, Liu, Yijin, and Chen, Guoying. Wed .
"Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy". United States. https://doi.org/10.1038/ncomms14309. https://www.osti.gov/servlets/purl/1347552.
@article{osti_1347552,
title = {Phase transformation mechanism in lithium manganese nickel oxide revealed by single-crystal hard X-ray microscopy},
author = {Kuppan, Saravanan and Xu, Yahong and Liu, Yijin and Chen, Guoying},
abstractNote = {© 2017 The Author(s). Understanding the reaction pathway and kinetics of solid-state phase transformation is critical in designing advanced electrode materials with better performance and stability. Despite the first-order phase transition with a large lattice mismatch between the involved phases, spinel LiMn 1.5 Ni 0.5 O 4 is capable of fast rate even at large particle size, presenting an enigma yet to be understood. The present study uses advanced two-dimensional and three-dimensional nano-Tomography on a series of well-formed Li x Mn 1.5 Ni 0.5 O 4 (0≤x≤1) crystals to visualize the mesoscale phase distribution, as a function of Li content at the sub-particle level. Inhomogeneity along with the coexistence of Li-rich and Li-poor phases are broadly observed on partially delithiated crystals, providing direct evidence for a concurrent nucleation and growth process instead of a shrinking-core or a particle-by-particle process. Superior kinetics of (100) facets at the vertices of truncated octahedral particles promote preferential delithiation, whereas the observation of strain-induced cracking suggests mechanical degradation in the material.},
doi = {10.1038/ncomms14309},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}
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