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 Laboratory (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
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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}
}
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