Method for producing electrode for non-aqueous secondary battery

Patent metadata

Field	Value
Publication number	US-2020411857-A1
Application number	US-202016910715-A
Country	US
Kind code	A1
Filing date	Jun 24, 2020
Priority date	Jun 25, 2019
Publication date	Dec 31, 2020
Grant date	—

Abstract

A method for producing an electrode for a non-aqueous secondary battery is provided, the method includes: mixing a compound containing lithium, a compound containing nickel, and barium titanate to obtain a mixture; heat-treating the mixture to obtain a first composition containing a lithium-transition metal composite oxide; preparing an electrode composition containing the first composition, a conductive aid, and a binder; and applying and compressing the electrode composition on a current collector to form an active material layer with a density of from 2.4 g/cm3 to 3.6 g/cm3 on the current collector.

First claim

What is claimed is:

1 . A method for producing an electrode for a non-aqueous secondary battery, the method comprising:
mixing a compound containing lithium, a compound containing nickel, and barium titanate to obtain a mixture; heat-treating the mixture to obtain a first composition containing a lithium-transition metal composite oxide; preparing an electrode composition containing the first composition, a conductive aid, and a binder; and applying and compressing the electrode composition on a current collector to form an active material layer with a density of from 2.4 g/cm 3 to 3.6 g/cm 3 on the current collector.

2 . The method according to claim 1 , wherein the lithium-transition metal composite oxide has a chemical composition with a ratio of a number of moles of nickel to a total number of moles of metals other than lithium of less than 1.

3 . The method according to claim 1 , wherein the lithium-transition metal composite oxide further contains cobalt, and wherein a ratio of a number of moles of cobalt in the lithium-transition metal composite oxide to a total number of moles of metals other than lithium in the lithium-transition metal composite oxide is less than 1.

4 . The method according to claim 1 , wherein the lithium-transition metal composite oxide further contains at least one selected from the group consisting of aluminium, manganese, and magnesium, and wherein a ratio of a total number of moles of aluminium, manganese, and magnesium in the lithium-transition metal composite oxide to a total number of moles of metals other than lithium in the lithium-transition metal composite oxide is 0.35 or less.

5 . The method according to claim 1 , wherein the lithium-transition metal composite oxide has a composition represented by formula (1):
Li p Ni x Co y M 1 z Ti v M 2 w O 2   (1)
wherein 0.95≤p≤1.5, 0<x<1, 0≤y<1, 0≤z≤0.35, 0.0001≤v≤0.02, 0≤w≤0.05, and x+y+z+v+w≤1; M 1 is at least one selected from the group consisting of Al, Mn, and Mg; and M 2 is at least one selected from the group consisting of Zr, W, Ta, Nb, and Mo.

6 . The method according to claim 1 , wherein the mixture contains barium titanate in an amount of 0.1 mol % or more relative to the compound containing nickel.

7 . The method according to claim 6 , wherein the mixture contains barium titanate in an amount of 2 mol % or less relative to the compound containing nickel.

8 . The method according to claim 1 , wherein the heat-treating is carried out at a temperature of from 700° C. to 900° C.

9 . The method according to claim 2 , wherein the mixture contains barium titanate in an amount of 0.1 mol % or more relative to the compound containing nickel.

10 . The method according to claim 9 , wherein the mixture contains barium titanate in an amount of 2 mol % or less relative to the compound containing nickel.

11 . The method according to claim 2 , wherein the heat-treating is carried out at a temperature of from 700° C. to 900° C.

12 . The method according to claim 3 , wherein the mixture contains barium titanate in an amount of 0.1 mol % or more relative to the compound containing nickel.

13 . The method according to claim 12 , wherein the mixture contains barium titanate in an amount of 2 mol % or less relative to the compound containing nickel.

14 . The method according to claim 3 , wherein the heat-treating is carried out at a temperature of from 700° C. to 900° C.

15 . The method according to claim 4 , wherein the mixture contains barium titanate in an amount of 0.1 mol % or more relative to the compound containing nickel.

16 . The method according to claim 15 , wherein the mixture contains barium titanate in an amount of 2 mol % or less relative to the compound containing nickel.

17 . The method according to claim 4 , wherein the heat-treating is carried out at a temperature of from 700° C. to 900° C.

18 . The method according to claim 5 , wherein the mixture contains barium titanate in an amount of 0.1 mol % or more relative to the compound containing nickel.

19 . The method according to claim 18 , wherein the mixture contains barium titanate in an amount of 2 mol % or less relative to the compound containing nickel.

20 . The method according to claim 5 , wherein the heat-treating is carried out at a temperature of from 700° C. to 900° C.

Assignees

• Nichia Corp

Inventors

• Sawada Shunsuke
• Kanechika Hideyuki
• Murayama Masahiro

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• C01P2002/50

  Solid solutions · CPC title

• C01P2004/51

  Particles with a specific particle size distribution · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01P2006/40

  Electric properties · CPC title