Lipon coatings for high voltage and high temperature Li-ion battery cathodes

Patent metadata

Field	Value
Publication number	US-10424792-B2
Application number	US-201715416500-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Oct 12, 2012
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

A lithium ion battery includes an anode and a cathode. The cathode includes a lithium, manganese, nickel, and oxygen containing compound. An electrolyte is disposed between the anode and the cathode. A protective layer is deposited between the cathode and the electrolyte. The protective layer includes pure lithium phosphorus oxynitride and variations that include metal dopants such as Fe, Ti, Ni, V, Cr, Cu, and Co. A method for making a cathode and a method for operating a battery are also disclosed.

First claim

We claim:

1. A method of making a lithium ion battery, comprising the steps of:
providing a cathode material comprising a lithium, manganese, nickel and oxygen containing compound, the cathode material being provided as particles;
providing a lithium phosphate target;
sputtering a lithium phosphorus oxynitride in a nitrogen plasma to coat the lithium, manganese, nickel and oxygen containing compound with a protective coating of lithium phosphorus oxynitride, wherein the protective coating is provided as a uniform coating of from 0.5 to 10 nm on all sides of the cathode material particles prior to electrode preparation, the coated particles being unannealed;
forming a cathode comprising the coated particles;
applying a lithium salt electrolyte layer in operable contact with the cathode, the electrolyte layer being free of lithium phosphorus oxynitride;
applying an anode layer in operable contact with the electrolyte layer; and,
the battery having capacity retention at 60° C.

2. The method of claim 1 , wherein the sputtering is RF magnetron sputtering.

3. The method of claim 1 , further comprising the step of agitating or flowing the particles during the sputtering step.

Assignees

• Ut Battelle Llc

Inventors

• Dudney Nancy J
• Liang Chengdu
• Nanda Jagjit
• Veith Gabriel M
• Kim Yoongu
• Martha Surendra Kumar

Classifications

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• Y10T29/49115

  including coating or impregnating · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title