Particle, electrode, power storage device, electronic device, and method for manufacturing electrode

Patent metadata

Field	Value
Publication number	US-12406986-B2
Application number	US-202318212440-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Oct 27, 2014
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.

First claim

What is claimed is:

1. A method for manufacturing an electrode layer, comprising:
mixing a particle, a binder, and a solvent to form a mixture;
forming the mixture over a current collector to form a mixed layer; and
performing heat treatment on the mixed layer to form the electrode layer at a temperature higher than or equal to 160° C. and lower than or equal to 400° C. in a nitrogen or rare gas atmosphere,
wherein the particle after the heat treatment comprises a first region and a second region,
wherein the second region is located at a more surface side than the first region,
wherein the second region has a spinel structure,
wherein the first region and the second region comprises lithium, manganese, an element M, and oxygen,
wherein a thickness of the second region is greater than or equal to 0.1 nm and less than or equal to 30 nm,
wherein the element represented by M is one or more elements selected from Cr, Ni, Ga, Fe, Mo, In, Nb, Co, Mg, Al, Ti, Cu, Zn, Si, and P, and
wherein the electrode layer comprises a compound having a bond between at least one element selected from lithium, manganese, the element M, and oxygen and at least one element in the binder.

2. The method for manufacturing an electrode layer according to claim 1 , wherein the compound includes fluorine and at least one element selected from lithium, manganese and the element M.

3. The method for manufacturing an electrode layer according to claim 1 , wherein the bond is a metal-fluorine bond.

4. The method for manufacturing an electrode layer according to claim 1 , wherein the heat treatment is performed at a temperature higher than or equal to 200° C.

5. A power storage device manufactured by the method according to claim 1 .

6. A method for manufacturing an electrode layer, comprising:
mixing a particle, a binder, and a solvent to form a mixture;
forming the mixture over a current collector to form a mixed layer; and
performing heat treatment on the mixed layer to form the electrode layer at a temperature higher than or equal to 160° C. and lower than or equal to 400° C. in a nitrogen or rare gas atmosphere,
wherein the particle after the heat treatment comprises a first region and a second region,
wherein the second region is located at a more surface side than the first region,
wherein the second region has a spinel structure,
wherein the first region and the second region comprises lithium, manganese, an element M, and oxygen,
wherein a thickness of the second region is greater than or equal to 0.1 nm and less than or equal to 30 nm,
wherein the element represented by M is one or more elements selected from Cr, Ni, Ga, Fe, Mo, In, Nb, Co, Mg, Al, Ti, Cu, Zn, Si, and P, and
wherein a peak due to a bond between at least one element selected from lithium, manganese, the element M, and oxygen and at least one element in the binder is observed by an XPS analysis of the electrode layer.

7. The method for manufacturing an electrode layer according to claim 6 , wherein the compound includes fluorine and at least one element selected from lithium, manganese and the element M.

8. The method for manufacturing an electrode layer according to claim 6 , wherein the bond is a metal-fluorine bond.

9. The method for manufacturing an electrode layer according to claim 6 , wherein the heat treatment is performed at a temperature higher than or equal to 200° C.

10. A power storage device manufactured by the method according to claim 6 .

11. The method for manufacturing an electrode layer according to claim 1 , wherein the first region has a layered rock-salt structure.

Assignees

• Semiconductor Energy Lab

Inventors

• Kawakami Takahiro
• Ochiai Teruaki
• Yoshitomi Shuhei
• Hirohashi Takuya
• Motoyoshi Mako
• Momma Yohei
• Goto Junya

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title