Positive electrode and electrochemical apparatus and electronic apparatus containing same

Patent metadata

Field	Value
Publication number	US-12308437-B2
Application number	US-202217708089-A
Country	US
Kind code	B2
Filing date	Mar 30, 2022
Priority date	Nov 4, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

The present application relates to a positive electrode and an electrochemical apparatus and an electronic apparatus containing the same. The positive electrode includes a conductive agent, where the conductive agent includes a non-carbon material. The present application provides a positive electrode that includes a conductive agent with high voltage and oxidization resistance, which can effectively improve high voltage cycle performance of the electrochemical apparatus.

First claim

What is claimed is:

1. A positive electrode, comprising: a conductive agent, wherein the conductive agent comprises a non-carbon material-; wherein the non-carbon material comprises a semiconducting oxide; wherein the semiconducting oxide comprises at least one of tin oxide, indium oxide, antimony tin oxide, or indium tin oxide; and a particle diameter of the conductive agent is less than or equal to approximately 100 nm.

2. The positive electrode according to claim 1 , wherein the semiconducting oxide is the indium tin oxide, a molar ratio of tin to indium in the semiconducting oxide is 0.1:1 to 0.5:1.

3. The positive electrode according to claim 1 , wherein the semiconducting oxide is the antimony tin oxide a molar ratio of antimony to tin in the semiconducting oxide is 0.1:1 to 0.5:1.

4. The positive electrode according to claim 1 , wherein a particle diameter of the conductive agent is less than or equal to approximately 50 nm.

5. The positive electrode according to claim 1 , further comprising a positive electrode active material and a binder, wherein the positive electrode active material comprises a positive electrode active material with a charging cut-off voltage of greater than or equal to 4.5 V.

6. The positive electrode according to claim 5 , wherein the positive electrode active material with a charging cut-off voltage of greater than or equal to 4.5 V comprises at least one of lithium cobaltate, a spinel lithium nickel manganese, or a lithium-rich manganese-based material.

7. The positive electrode according to claim 5 , wherein the binder comprises at least one of fluorine-containing resin, polypropylene, a fibrous binder, a rubber binder, or a polyimide binder.

8. The positive electrode according to claim 5 , wherein based on a total weight of the conductive agent, the positive electrode active material and the binder, a weight percentage of the conductive agent is 3.5 wt % to 10 wt %.

9. An electrochemical apparatus, comprising a positive electrode, wherein the positive electrode comprises a conductive agent, wherein the conductive agent comprises a non-carbon material; wherein the non-carbon material comprises a semiconducting oxide; wherein the semiconducting oxide comprises at least one of tin oxide, indium oxide, antimony tin oxide, or indium tin oxide; and a particle diameter of the conductive agent is less than or equal to approximately 100 nm.

10. The electrochemical apparatus according to claim 9 , wherein the positive electrode further comprises a positive electrode active material and a binder, wherein the positive electrode active material comprises a positive electrode active material with a charging cut-off voltage of greater than or equal to 4.5 V.

11. The electrochemical apparatus according to claim 9 , wherein based on a total weight of the conductive agent, the positive electrode active material and the binder, a weight percentage of the conductive agent is 3.5 wt % to 10 wt %.

12. The electrochemical apparatus according to claim 9 , wherein based on a total weight of positive electrode paste on positive electrode current collector, a weight percentage of the conductive agent is 3.5 wt % to 10 wt %.

13. An electronic apparatus, comprising: an electrochemical apparatus, the electrochemical apparatus comprises a conductive agent, wherein the conductive agent comprises a non-carbon material; wherein the non-carbon material comprises a semiconducting oxide; wherein the semiconducting oxide comprises at least one of tin oxide, indium oxide, antimony tin oxide, or indium tin oxide; and a particle diameter of the conductive agent is less than or equal to approximately 100 nm.

Assignees

• Ningde Amperex Technology Ltd

Inventors

• Zhou Molin

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/525 Primary

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

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title