Lithium secondary battery

Patent metadata

Field	Value
Publication number	US-12009491-B2
Application number	US-202117474684-A
Country	US
Kind code	B2
Filing date	Sep 14, 2021
Priority date	Sep 15, 2020
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A lithium secondary battery according to an embodiment of the present invention includes an electrode assembly including a separation layer, and a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked, and a gas adsorption layer coated on a single surface of an outermost anode among the plurality of anodes.

First claim

What is claimed is:

1. A lithium secondary battery, comprising:
an electrode assembly comprising:
a separation layer; and
a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked; and

a gas adsorption layer coated only on a single surface of each of an uppermost anode and a lowermost anode among the plurality of anodes included in the electrode assembly,
wherein each of the plurality of anodes comprises an anode current collector and an anode active material layer, and the gas adsorption layer contacts the anode active material layer.

2. The lithium secondary battery of claim 1 , wherein
the anode active material layer comprises
an upper anode active material layer and a lower anode active material layer formed on a top surface and a bottom surface of the anode current collector, respectively.

3. The lithium secondary battery of claim 2 , wherein the gas adsorption layer is coated on an anode active material layer that does not face a cathode adjacent to the outermost anode of the upper anode active material layer and the lower anode active material layer.

4. The lithium secondary battery of claim 3 , wherein the gas adsorption layer includes gas adsorption particles, and an amount of the gas adsorption particles is from 0.1 wt % to 20 wt % based on a total weight of the anode active material layer that does not face the cathode adjacent to the outermost anode.

5. The lithium secondary battery of claim 1 , wherein the gas adsorption layer includes at least one selected from the group consisting of activated carbon, soda lime, zeolite, carboxymethyl cellulose (CMC), diethanol amine (DEA), triethanolamine (TEA), N-methyldiethanolamine (MDEA) and a diene-based compound.

Assignees

• Sk Innovation Co Ltd
• Sk On Co Ltd

Inventors

• Lee Sang Han
• Cho Yong Hyun
• Kang Min Gu
• Kang Min Suk
• Lee Yoon Ji

Classifications

• H01M4/628

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

• H01M10/0525

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

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title