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Solid solution lithium alloy cermet anodes

Patent ·
OSTI ID:1087904
A metal-ceramic composite ("cermet") has been produced by a chemical reaction between a lithium compound and another metal. The cermet has advantageous physical properties, high surface area relative to lithium metal or its alloys, and is easily formed into a desired shape. An example is the formation of a lithium-magnesium nitride cermet by reaction of lithium nitride with magnesium. The reaction results in magnesium nitride grains coated with a layer of lithium. The nitride is inert when used in a battery. It supports the metal in a high surface area form, while stabilizing the electrode with respect to dendrite formation. By using an excess of magnesium metal in the reaction process, a cermet of magnesium nitride is produced, coated with a lithium-magnesium alloy of any desired composition. This alloy inhibits dendrite formation by causing lithium deposited on its surface to diffuse under a chemical potential into the bulk of the alloy.
Research Organization:
The Regents of the University of California (Oakland, CA)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-05CH11231
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Number(s):
8,480,922
Application Number:
12/665,004
OSTI ID:
1087904
Country of Publication:
United States
Language:
English

References (3)

A sealed optical cell for the study of lithium-electrode|electrolyte interfaces journal March 2003
Solid solution lithium alloy cermet anodes journal December 2007
Issues and challenges facing rechargeable lithium batteries journal November 2001

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