Invention Grant
- Patent Title: Method for manufacturing positive electrode active material, and lithium ion battery
-
Application No.: US16893726Application Date: 2020-06-05
-
Publication No.: US10985369B2Publication Date: 2021-04-20
- Inventor: Takuya Miwa , Yumiko Yoneda , Teppei Oguni
- Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Applicant Address: JP Atsugi
- Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- Current Assignee Address: JP Atsugi
- Agency: Nixon Peabody LLP
- Agent Jeffrey L. Costellia
- Priority: JP2016-099458 20160518
- Main IPC: H01M4/58
- IPC: H01M4/58 ; C01B25/45 ; H01M4/02 ; H01M10/0525

Abstract:
A composite oxide with high diffusion rate of lithium is provided. Alternatively, a lithium-containing complex phosphate with high diffusion rate of lithium is provided. Alternatively, a positive electrode active material with high diffusion rate of lithium is provided. Alternatively, a lithium ion battery with high output is provided. Alternatively, a lithium ion battery that can be manufactured at low cost is provided. A positive electrode active material is formed through a first step of mixing a lithium compound, a phosphorus compound, and water, a second step of adjusting pH by adding a first aqueous solution to a first mixed solution formed in the first step, a third step of mixing an iron compound with a second mixed solution formed in the second step, a fourth step of performing heat treatment under a pressure more than or equal to 0.1 MPa and less than or equal to 2 MPa at a highest temperature more than 100° C. and less than or equal to 119° C. on a third mixed solution formed in the third step with a pH of more than or equal to 3.5 and less than or equal to 5.0.
Public/Granted literature
- US20200303739A1 METHOD FOR MANUFACTURING POSITIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM ION BATTERY Public/Granted day:2020-09-24
Information query