Storage battery electrode, manufacturing method thereof, storage battery, and electronic device

Patent metadata

Field	Value
Publication number	US-2017352864-A1
Application number	US-201515538049-A
Country	US
Kind code	A1
Filing date	Dec 25, 2015
Priority date	Jan 9, 2015
Publication date	Dec 7, 2017
Grant date	—

Abstract

In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided.
As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.

First claim

1 . A method for manufacturing a storage battery electrode, comprising:
forming a first aqueous solution by mixing an active material with an aqueous solution including an oxidized derivative of a first conductive additive; forming a first mixture by drying the aqueous solution; forming a second mixture by mixing a second conductive additive and a binder; forming a third mixture by mixing the first mixture and the second mixture; and coating a current collector with the third mixture and reducing the oxidized derivative of the first conductive additive.

2 . The method for manufacturing a storage battery electrode according to claim 1 , characterized by adding a reducing agent to the first mixture after forming the first mixture.

3 .- 4 . (canceled)

5 . The method for manufacturing a storage battery electrode according to claim 1 , characterized in that the aqueous solution including the oxidized derivative of the first conductive additive is acidic.

6 . The method for manufacturing a storage battery electrode according to claim 1 , characterized in that the active material is basic.

7 . A storage battery electrode manufactured by the method for manufacturing a storage battery electrode according to claim 1 .

8 .- 9 . (canceled)

10 . A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 7 , wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.

11 . An electronic device comprising the storage battery according to claim 10 and a display panel, a light source, an operation key, a speaker, or a microphone.

12 . A method for manufacturing a storage battery electrode, comprising:
forming a first aqueous solution by mixing an active material with an aqueous solution including an oxidized derivative of a first conductive additive; forming a first mixture by drying the aqueous solution; forming a second mixture by mixing a second conductive additive and a binder; forming a third mixture by mixing the first mixture and the second mixture and reducing the oxidized derivative of the first conductive additive; and coating a current collector with the third mixture.

13 . The method for manufacturing a storage battery electrode according to claim 12 , characterized by adding a reducing agent to the first mixture after forming the first mixture.

14 . The method for manufacturing a storage battery electrode according to claim 12 , characterized in that the aqueous solution including the oxidized derivative of the first conductive additive is acidic.

15 . The method for manufacturing a storage battery electrode according to claim 12 , characterized in that the active material is basic.

16 . A storage battery electrode manufactured by the method for manufacturing a storage battery electrode according to claim 12 .

17 . A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 16 , wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.

18 . An electronic device comprising the storage battery according to claim 17 and a display panel, a light source, an operation key, a speaker, or a microphone.

19 . A method for manufacturing a storage battery electrode, comprising:
forming a first aqueous solution by mixing an active material with an aqueous solution including an oxidized derivative of a first conductive additive; forming a first mixture by reducing the oxidized derivative of the first conductive additive by drying the aqueous solution; forming a second mixture by mixing a second conductive additive and a binder; forming a third mixture by mixing the first mixture and the second mixture; and coating a current collector with the third mixture.

20 . The method for manufacturing a storage battery electrode according to claim 19 , characterized by adding a reducing agent to the first mixture after forming the first mixture.

21 . The method for manufacturing a storage battery electrode according to claim 19 , characterized in that the aqueous solution including the oxidized derivative of the first conductive additive is acidic.

22 . The method for manufacturing a storage battery electrode according to claim 19 , characterized in that the active material is basic.

23 . A storage battery electrode manufactured by the method for manufacturing a storage battery electrode according to claim 19 .

24 . A storage battery electrode manufactured by the method for manufacturing a storage battery electrode according to claim 19 .

25 . A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 24 , wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.

26 . An electronic device comprising the storage battery according to claim 25 and a display panel, a light source, an operation key, a speaker, or a microphone.

27 . A storage battery electrode comprising a current collector and an active material layer,
wherein the active material layer contains an active material, a conductive additive containing graphene, a binder, and a reducing agent.

28 . A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 27 , wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.

29 . An electronic device comprising the storage battery according to claim 28 and a display panel, a light source, an operation key, a speaker, or a microphone.

30 . A storage battery electrode comprising a current collector and an active material layer,
wherein the active material layer contains an active material, a conductive additive containing graphene, a binder, and an oxidized derivative of a reducing agent.

31 . A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 30 , wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.

32 . An electronic device comprising the storage battery according to claim 31 and a display panel, a light source, an operation key, a speaker, or a microphone.

Assignees

• Semiconductor Energy Lab

Inventors

• Kawakami Takahiro
• Momma Yohei
• Ochiai Teruaki
• Ikenuma Tatsuya

Classifications

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/13

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

• H01M4/625

  Carbon or graphite · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/0471

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