Lithium-ion cell containing solid adsorbent

Patent metadata

Field	Value
Publication number	US-2021126298-A1
Application number	US-201916661455-A
Country	US
Kind code	A1
Filing date	Oct 23, 2019
Priority date	Oct 23, 2019
Publication date	Apr 29, 2021
Grant date	—

Abstract

According to one or more embodiments, a method of producing a lithium-ion cell includes constructing a cell defining a cavity housing an electrode assembly including a cathode, an anode, a separator, and an electrolyte, forming the cell to generate formation gas in the cavity, and releasing the formation gas from the cavity. The method further includes placing a solid adsorbent in the cavity adjacent the electrode assembly after the releasing, and sealing the cavity with the solid adsorbent therein such that post-formation gas is adsorbed by the solid adsorbent in the cavity.

First claim

What is claimed is:

1 . A method of producing a lithium-ion cell comprising:
constructing a cell defining a cavity housing an electrode assembly including a cathode, an anode, a separator, and an electrolyte; forming the cell to generate formation gas in the cavity; releasing the formation gas from the cavity; placing a solid adsorbent in the cavity adjacent the electrode assembly after the releasing; and sealing the cavity with the solid adsorbent therein such that post-formation gas is adsorbed by the solid adsorbent in the cavity.

2 . The method of claim 1 , wherein the solid adsorbent is a molecular sieve, zeolite, metal-organic framework, or covalent organic framework.

3 . The method of claim 1 , wherein the solid adsorbent is a SA molecular sieve.

4 . The method of claim 1 , wherein the releasing includes removing a portion of the cell such that the cavity has an opening.

5 . The method of claim 4 , wherein the sealing includes sealing the opening.

6 . The method of claim 1 , wherein the releasing includes removing a plug to open a fill hole, and the sealing includes inserting the plug to seal the fill hole.

7 . The method of claim 1 , wherein the post-formation gas is hydrogen, methane, ethane, ethene, propene, carbon monoxide, carbon dioxide, or mixtures thereof.

8 . The method of claim 1 , wherein the cathode includes LiNi 0.8 Mn 0.1 Co 0.1 O 2 , the anode includes natural graphite, and the electrolyte includes lithium hexafluorophosphate dissolved in a mixture of ethylene carbonate, ethyl methyl carbonate and dimethyl carbonate.

9 . The method of claim 1 , wherein the cell is a pouch cell formed of metallized plastic.

10 . The method of claim 1 , wherein the cell is a prismatic cell having a metal can body.

11 . A method comprising:
constructing a cell defining a cavity housing an electrode assembly; forming the cell to generate formation gas in the cavity; producing an opening to the cavity to release the formation gas from the cavity; placing a solid adsorbent in the cavity through the opening after the formation gas is released; and sealing the opening with the solid adsorbent in the cavity such that post-formation gas is adsorbed by the solid adsorbent in the cavity during use and storage.

12 . The method of claim 11 , wherein the cavity is defined by a first portion of the cell housing the electrode assembly and a second portion of the cell adjacent the electrode assembly.

13 . The method of claim 12 , wherein the producing includes removing the second portion to form the opening to the cavity.

14 . The method of claim 11 , wherein the opening is a fill hole in the cell.

15 . The method of claim 14 , wherein the producing includes removing a plug to open the fill hole, and the sealing includes inserting the plug to close the fill hole.

16 . The method of claim 11 , wherein the post-formation gas is hydrogen, methane, ethane, ethene, propene, carbon monoxide, carbon dioxide, or mixtures thereof.

17 . The method of claim 11 , wherein the solid adsorbent is a molecular sieve, zeolite, metal-organic framework, or covalent organic framework.

18 . The method of claim 11 , wherein the solid adsorbent is a 5 Å molecular sieve.

19 . A lithium-ion cell comprising:
a body defining a cavity housing an electrode assembly including a cathode, an anode, and an electrolyte, and a solid adsorbent adjacent the electrode assembly, the solid adsorbent being selected to adsorb a post-formation gas, wherein the post-formation gas generated in the cavity during storage or use is adsorbed by the solid adsorbent in the cavity.

20 . The lithium-ion cell of claim 19 , wherein the post-formation gas is hydrogen, methane, ethane, ethene, propene, carbon monoxide, carbon dioxide, or mixtures thereof.

Assignees

• Ford Global Tech Llc

Inventors

• Li Feng
• Tipton Andrew

Classifications

• H01M50/392 Primary

  with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes · CPC title

• H01M50/358

  External gas exhaust passages located on the battery cover or case · CPC title

• H01M50/308

  Detachable arrangements, e.g. detachable vent plugs or plug systems · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M10/52 Primary

  Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30) · CPC title