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Title: Tailoring Alumina Based Interphases on Lithium Ion Cathodes

Abstract

In this study, artificial aluminum-bearing interphases are formed on LiNi 0.5Mn 0.3Co 0.2O 2 (NMC532) cathodes via wet-chemical surface treatments with different solvents, aluminum precursors, loading levels, and annealing conditions. The effects of different surface-treatment conditions on interphase chemistries, morphologies, and local atomic environments are studied with the combination of surface-sensitive electron microscopy and local-probe solid state nuclear magnetic resonance techniques. A variation of Al 2O 3, LiAlO 2, and other lithium-bearing species with different phases and morphologies are formed as an interphase on top of NMC532, controlled by the polarity of solvent systems, the corrosivity of aluminum salts, the initial alumina loading, and the annealing temperature. The nature of these initial surface interphases shows great influence on electrode impedance, initial capacities, and capacity retention rates in electrochemical tests. Post-electrochemistry characterizations on cycled cathodes show that surface LiAlO 2 phases are relatively stable against the potential HF etching, whereas Al 2O 3 is reacted and consumed. Both half-cell and full-cell testing results of cathodes treated by optimized protocols demonstrate remarkable improvements in the capacity retention compared with the baseline. These fundamental understandings on interphase chemistries provide deep insights to the control of cathode surfaces and map-out important guidelines for themore » design of scalable cathode coatings.« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1478282
Alternate Identifier(s):
OSTI ID: 1487111
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 165; Journal Issue: 14; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; batteries; alumina coating; cathode materials; solvent

Citation Formats

Han, Binghong, Dunlop, Alison R., Trask, Stephen E., Key, Baris, Vaughey, John T., and Dogan, Fulya. Tailoring Alumina Based Interphases on Lithium Ion Cathodes. United States: N. p., 2018. Web. doi:10.1149/2.0211814jes.
Han, Binghong, Dunlop, Alison R., Trask, Stephen E., Key, Baris, Vaughey, John T., & Dogan, Fulya. Tailoring Alumina Based Interphases on Lithium Ion Cathodes. United States. doi:10.1149/2.0211814jes.
Han, Binghong, Dunlop, Alison R., Trask, Stephen E., Key, Baris, Vaughey, John T., and Dogan, Fulya. Fri . "Tailoring Alumina Based Interphases on Lithium Ion Cathodes". United States. doi:10.1149/2.0211814jes.
@article{osti_1478282,
title = {Tailoring Alumina Based Interphases on Lithium Ion Cathodes},
author = {Han, Binghong and Dunlop, Alison R. and Trask, Stephen E. and Key, Baris and Vaughey, John T. and Dogan, Fulya},
abstractNote = {In this study, artificial aluminum-bearing interphases are formed on LiNi0.5Mn0.3Co0.2O2 (NMC532) cathodes via wet-chemical surface treatments with different solvents, aluminum precursors, loading levels, and annealing conditions. The effects of different surface-treatment conditions on interphase chemistries, morphologies, and local atomic environments are studied with the combination of surface-sensitive electron microscopy and local-probe solid state nuclear magnetic resonance techniques. A variation of Al2O3, LiAlO2, and other lithium-bearing species with different phases and morphologies are formed as an interphase on top of NMC532, controlled by the polarity of solvent systems, the corrosivity of aluminum salts, the initial alumina loading, and the annealing temperature. The nature of these initial surface interphases shows great influence on electrode impedance, initial capacities, and capacity retention rates in electrochemical tests. Post-electrochemistry characterizations on cycled cathodes show that surface LiAlO2 phases are relatively stable against the potential HF etching, whereas Al2O3 is reacted and consumed. Both half-cell and full-cell testing results of cathodes treated by optimized protocols demonstrate remarkable improvements in the capacity retention compared with the baseline. These fundamental understandings on interphase chemistries provide deep insights to the control of cathode surfaces and map-out important guidelines for the design of scalable cathode coatings.},
doi = {10.1149/2.0211814jes},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 14,
volume = 165,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1149/2.0211814jes

Citation Metrics:
Cited by: 1 work
Citation information provided by
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Figures / Tables:

Figure 1 Figure 1: SEM images of 2wt%Al2O3-coated NMC532 particles, wet-coated with Al-N or Al-I in methanol, annealed at different temperatures. SEM images for more precursor + solvent combinations can be found in Figure S3.

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Works referenced in this record:

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.