The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2021
Filed:
Dec. 03, 2018
Uchicago Argonne, Llc, Chicago, IL (US);
Anil U. Mane, Naperville, IL (US);
Jeffrey W. Elam, Elmhurst, IL (US);
Joong Sun Park, Woodridge, IL (US);
Jason R. Croy, Bolingbrook, IL (US);
UChicago Argonne, LLC, Chicago, IL (US);
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 (AlWF) improves the electrochemical stability of LiCoO. AlWFthin 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 AlWFcoatings (<10 Å) on LiCoOsignificantly enhance stability relative to bare LiCoOwhen cycled to 4.4 V. The coated LiCoOexhibited 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 AlWFcoated 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.