High capacity, air-stable, structurally isomorphous lithium alloy multilayer porous foams

Patent metadata

Field	Value
Publication number	US-2020227736-A1
Application number	US-201816628880-A
Country	US
Kind code	A1
Filing date	Jul 9, 2018
Priority date	Jul 7, 2017
Publication date	Jul 16, 2020
Grant date	—

Abstract

The invention relates to composite multilayer lithium ion battery anodes that include a porous metal alloy foam, and a lithium ion conductor coating applied to the metal alloy foam. The metal alloy foam can include structurally isomorphous alloys of lithium and, optionally, lithium and magnesium. The lithium ion conductor coating can include ternary lithium silicate, such as, lithium orthosilicate. Lithium ions from the ternary lithium silicate may be deposited within the pores of the metal alloy foam. Optionally, the lithium ion conductor coating may include a dopant. The dopant can include one or more of magnesium, calcium, vanadium, niobium and fluorine, and mixtures and combinations thereof.

First claim

1 . A composite multilayer lithium ion battery anode, comprising:
a porous metal alloy foam; and a lithium ion conductor coating applied to the porous metal alloy foam, wherein, growth of dendrites on the composite multilayer lithium ion battery anode is reduced as compared to a lithium battery anode absent the multilayer porous foam and lithium ion conductor coating.

2 . The composite of claim 1 , wherein the porous metal alloy foam comprises a structurally isomorphous alloy.

3 . The composite of claim 2 , wherein the structurally isomorphous alloy comprises lithium.

4 . The composite of claim 3 , wherein the structurally isomorphous alloy of lithium further comprises a solid solution of magnesium.

5 . The composite of claim 4 , wherein the structurally isomorphous alloy of lithium comprises at least one element selected from the group consisting of zinc, aluminum, yttrium, calcium, strontium, iron and silver.

6 . The composite of claim 1 , wherein the lithium ion conductor coating comprises ternary lithium silicate.

7 . The composite of claim 6 , wherein the ternary lithium silicate is lithium orthosilicate.

8 . The composite of claim 1 , wherein the lithium ion conductor coating comprises a dopant.

9 . The composite of claim 8 , wherein the dopant is selected from the group consisting of magnesium, calcium, vanadium, niobium, fluorine, and mixtures and combinations thereof.

10 . The composite of claim 8 , wherein the dopant interacts with a site in the ternary lithium silicate selected from the group consisting of lithium ion, oxygen atom, silicon atom, and combinations thereof.

11 . The composite of claim 10 , wherein the dopant interacts with the lithium ion and the dopant is selected from the group consisting of calcium, magnesium, and mixtures and combinations thereof.

12 . The composite of claim 10 , wherein the dopant interacts with the oxygen atom and the dopant is fluorine.

13 . The composite of claim 10 , wherein the dopant interacts with the silicon atom and the dopant is selected from the group consisting of vanadium, niobium, and mixtures and combinations thereof.

14 . The composite of claim 1 , wherein lithium atoms are deposited within pores formed in the porous metal alloy foam.

15 . A method of preparing a composite multilayer lithium ion battery anode, comprising:
forming a porous metal alloy foam; applying a lithium ion conductor coating to the porous metal alloy foam; and optionally, doping one or more sites of the lithium ion conductor coating with a dopant, wherein the one or more sites are selected from the group consisting of lithium ion, oxygen atom and silicon atom, and wherein, the composite effectively reduces growth of dendrites on the composite multilayer lithium ion battery as compared to a lithium battery anode absent the multilayer porous foam and lithium ion conductor coating.

Assignees

• Univ Pittsburgh Commonwealth Sys Higher Education

Inventors

• Kumta Prashant N
• Gattu Bharat
• Datta Moni Kanchan
• Velikokhatnyi Oleg
• Shanthi Pavithra Murugavel
• Jampani Hanumantha Prashanth

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/0459 Primary

  Electrochemical doping, intercalation, occlusion or alloying · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M4/628

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title