Electrolyte membrane for lithium-air battery, method of manufacturing same and lithium-air battery comprising same

Patent metadata

Field	Value
Publication number	US-11916253-B2
Application number	US-202017129155-A
Country	US
Kind code	B2
Filing date	Dec 21, 2020
Priority date	Jun 2, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Disclosed are an electrolyte membrane for a lithium-air battery, a method of manufacturing the same, a cathode for a lithium-air battery, a method of manufacturing the same, and a lithium-air battery including the electrolyte membrane and the cathode. Particularly, the lithium-air battery includes i) an electrolyte membrane, which is manufactured using an inorganic melt admixture including two or more nitrogen-oxide compounds and thus may have a very low eutectic point, and ii) a cathode, which is manufactured by reducing a metal at a fast speed on a carbon material. As such, the lithium-air battery is capable of stably operating even at low temperatures and providing high power output.

First claim

What is claimed is:

1. A method of manufacturing an electrolyte membrane for a lithium-air battery, comprising:
preparing an inorganic salt;
preparing an inorganic melt admixture comprising the inorganic salt;
immersing a separator in the inorganic melt admixture; and
drying the immersed separator,
wherein the inorganic salt comprises:
three types of nitrogen-oxide compounds, four types of nitrogen-oxide compounds, or five types of nitrogen-oxide compounds,
wherein the three types of the nitrogen-oxide compounds comprise an amount of about 29 mol % to 35 mol % of lithium nitrate, an amount of about 51 mol % to 56 mol % of potassium nitrite and an amount of about 10 mol % to 15 mol % of cesium nitrate,
the four types of the nitrogen-oxide compounds comprise an amount of about 27 mol % to 31 mol % of lithium nitrate, an amount of about 38 mol % to 50 mol % of potassium nitrate, an amount of about 11 mol % to 20 mol % of sodium nitrate and an amount of about 10 mol % to 13 mol % of calcium nitrate, and
the five types of the nitrogen-oxide compounds comprise an amount of about 14 mol % to 17 mol % of lithium nitrate, an amount of about 29 mol % to 31 mol % of potassium nitrate, an amount of about 28 mol % to 32 mol % of cesium nitrate, an amount of about 9 mol % to 11 mol % of sodium nitrate and an amount of about 13 mol % to 18 mol % of calcium nitrate,

all the mol % based on the total mole of the nitrogen-oxide compounds.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Ulsan National Institute Of Science And Tech
• Kia Corp

Inventors

• Kwon Eun Ji
• Seo Samuel
• Oh Gwang Seok
• Kang Seok Ju
• Baek Kyung Eun

Classifications

• H01M50/446 Primary

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M50/403

  Manufacturing processes of separators, membranes or diaphragms · CPC title