Heat treatment of whole cell structures

Patent metadata

Field	Value
Publication number	US-11329267-B2
Application number	US-201916681597-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	Nov 12, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

Systems and methods are provided for heat treatment of whole cell structures. A battery may be formed based on applying of heat treatment to a whole cell composition that includes, at least, both anode material and cathode material, such that the anode material and the cathode material are heat treated at the same time. The heat treatment may include pyrolysis. The whole cell composition, and the corresponding cell formed based thereon, may include solid state electrolyte.

First claim

What is claimed is:

1. A whole cell composition for use in whole cell forming, comprising:
anode material;
cathode material; and
separator material;
wherein:
the anode material, the cathode material, and the separator material are configured to convert into, respectively, an anode, a cathode, and a separator of a whole cell, at the same time during a single heat treatment, wherein the single heat treatment is characterized by a first set of heat treatment conditions that are applied simultaneously to each of the anode material, the cathode material, and the separator material.

2. The whole cell composition of claim 1 , wherein the separator material converts to form non-conductive separator based on or during the single heat treatment.

3. The whole cell composition of claim 1 , further comprising at least one of an anode current collector and a cathode current collector that is heat treated during the single heat treatment, at the same time as the anode material and the cathode material.

4. The whole cell composition of claim 1 , further comprising solid state electrolyte.

5. The whole cell composition of claim 4 , wherein the solid state electrolyte comprises ceramic electrolytes comprising one or more of Li 7 La 3 Zr 2 O 12 (LLZO) and lithium aluminum germanium phosphate (LAGP).

6. The whole cell composition of claim 4 , wherein solid state electrolyte is or becomes porous.

7. The whole cell composition of claim 1 , wherein one or both of the anode material and the cathode material further comprise a binder.

8. The whole cell composition of claim 7 , wherein the binder comprises one or more of polyimide (PI), polyamide-imide (PAI), and polyvinyl butyral (PVB).

9. The whole cell composition of claim 1 , wherein the single heat treatment is conducted at temperature at or above 400° C.

10. The whole cell composition of claim 1 , wherein the first set of heat treatment conditions comprise conducting the single heat treatment at a preset temperature or temperature range.

Assignees

• Enevate Corp

Inventors

• Huang Qian
• Park Benjamin
• Browne Ian
• Kamath Rahul
• Lee David J

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M4/0407

  by coating on an electrolyte layer · CPC title

• H01M4/0471 Primary

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M50/609

  Arrangements or processes for filling with liquid, e.g. electrolytes · CPC title