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Title: Propagation topography of redox phase transformations in heterogeneous layered oxide cathode materials

Journal Article · · Nature Communications

© 2018 The Author(s). Redox phase transformations are relevant to a number of metrics pertaining to the electrochemical performance of batteries. These phase transformations deviate from and are more complicated than the conventional theory of phase nucleation and propagation, owing to simultaneous changes of cationic and anionic valence states as well as the polycrystalline nature of battery materials. Herein, we propose an integrative approach of mapping valence states and constructing chemical topographies to investigate the redox phase transformation in polycrystalline layered oxide cathode materials under thermal abuse conditions. We discover that, in addition to the three-dimensional heterogeneous phase transformation, there is a mesoscale evolution of local valence curvatures in valence state topographies. The relative probability of negative and positive local valence curvatures alternates during the layered-to-spinel/rocksalt phase transformation. The implementation of our method can potentially provide a universal approach to study phase transformation behaviors in battery materials and beyond.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231
OSTI ID:
1463350
Alternate ID(s):
OSTI ID: 1478360
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (10)

Deciphering the Cathode-Electrolyte Interfacial Chemistry in Sodium Layered Cathode Materials journal October 2018
Quantification of Heterogeneous Degradation in Li‐Ion Batteries journal May 2019
Spatial quantification of dynamic inter and intra particle crystallographic heterogeneities within lithium ion electrodes journal January 2020
Chemomechanical behaviors of layered cathode materials in alkali metal ion batteries journal January 2018
Thermally driven mesoscale chemomechanical interplay in Li 0.5 Ni 0.6 Mn 0.2 Co 0.2 O 2 cathode materials journal January 2018
Probing and quantifying cathode charge heterogeneity in Li ion batteries journal January 2019
Degradation and Aging Routes of Ni-Rich Cathode Based Li-Ion Batteries journal January 2020
TOPAS and TOPAS-Academic : an optimization program integrating computer algebra and crystallographic objects written in C++ journal February 2018
Degradation and Aging Routes of Ni-Rich Cathode Based Li-Ion Batteries text January 2020
NIR-II fluorescence microscopic imaging of cortical vasculature in non-human primates journal January 2020

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