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Title: Metal fluoride passivation coatings prepared by atomic layer deposition for Li-ion batteries

Abstract

The fabrication of robust interfaces between transition metal oxides and non-aqueous electrolytes is one of the great challenges of lithium ion batteries. Atomic layer deposition (ALD) of aluminum tungsten fluoride (AlW.sub.xF.sub.y) improves the electrochemical stability of LiCoO.sub.2. AlW.sub.xF.sub.y thin films were deposited by combining trimethylaluminum and tungsten hexafluoride. in-situ quartz crystal microbalance and transmission electron microscopy studies show that the films grow in a layer-by-layer fashion and are amorphous nature. Ultrathin AlW.sub.xF.sub.y coatings (<10 .ANG.) on LiCoO.sub.2 significantly enhance stability relative to bare LiCoO.sub.2 when cycled to 4.4 V. The coated LiCoO2 exhibited superior rate capability (up to 400 mA/g) and discharge capacities at a current of 400 mA/g were 51% and 92% of the first cycle capacities for the bare and AlW.sub.xF.sub.y coated materials. These results open new possibilities for designing ultrathin and electrochemically robust coatings of metal fluorides via ALD to enhance the stability of Li-ion electrodes.

Inventors:
; ; ;
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1495662
Patent Number(s):
10177365
Application Number:
14/693,719
Assignee:
UChicago Argonne, LLC (Chicago, IL)
Patent Classifications (CPCs):
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Apr 22
Country of Publication:
United States
Language:
English

Citation Formats

Mane, Anil U., Elam, Jeffrey W., Park, Joong Sun, and Croy, Jason R. Metal fluoride passivation coatings prepared by atomic layer deposition for Li-ion batteries. United States: N. p., 2019. Web.
Mane, Anil U., Elam, Jeffrey W., Park, Joong Sun, & Croy, Jason R. Metal fluoride passivation coatings prepared by atomic layer deposition for Li-ion batteries. United States.
Mane, Anil U., Elam, Jeffrey W., Park, Joong Sun, and Croy, Jason R. Tue . "Metal fluoride passivation coatings prepared by atomic layer deposition for Li-ion batteries". United States. https://www.osti.gov/servlets/purl/1495662.
@article{osti_1495662,
title = {Metal fluoride passivation coatings prepared by atomic layer deposition for Li-ion batteries},
author = {Mane, Anil U. and Elam, Jeffrey W. and Park, Joong Sun and Croy, Jason R.},
abstractNote = {The fabrication of robust interfaces between transition metal oxides and non-aqueous electrolytes is one of the great challenges of lithium ion batteries. Atomic layer deposition (ALD) of aluminum tungsten fluoride (AlW.sub.xF.sub.y) improves the electrochemical stability of LiCoO.sub.2. AlW.sub.xF.sub.y thin films were deposited by combining trimethylaluminum and tungsten hexafluoride. in-situ quartz crystal microbalance and transmission electron microscopy studies show that the films grow in a layer-by-layer fashion and are amorphous nature. Ultrathin AlW.sub.xF.sub.y coatings (<10 .ANG.) on LiCoO.sub.2 significantly enhance stability relative to bare LiCoO.sub.2 when cycled to 4.4 V. The coated LiCoO2 exhibited superior rate capability (up to 400 mA/g) and discharge capacities at a current of 400 mA/g were 51% and 92% of the first cycle capacities for the bare and AlW.sub.xF.sub.y coated materials. These results open new possibilities for designing ultrathin and electrochemically robust coatings of metal fluorides via ALD to enhance the stability of Li-ion electrodes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}