Abstract: The present application relates to lithium iron phosphate, a preparation method therefor, and a lithium-ion battery. The preparation method includes: sintering dry materials of an iron source, a lithium source, a phosphorus source, and a reductive carbon source to obtain lithium iron phosphate, wherein the sintering atmosphere includes a mild oxidizing gas, the mild oxidizing gas includes carbon dioxide, and the sintering temperature is 800-900° C.
Type:
Application
Filed:
February 8, 2022
Publication date:
June 1, 2023
Applicant:
BTR (TIANJIN) NANO MATERIAL MANUFACTURE CO., LTD.
Abstract: A recycling method for a positive electrode material includes the following steps: sintering a positive electrode material to be recycled in an oxidizing atmosphere to produce the positive electrode material. Gases in the oxidizing atmosphere include CO2. The positive electrode material produced has a reduced carbon content, great cycle stability and rate performance, the carbon content being ?2.85 wt %, and the 200-cycle capacity retention rate being ?99.0%.
Type:
Application
Filed:
August 5, 2019
Publication date:
April 14, 2022
Applicant:
BTR (Tianjin ) Nano Material Manufacture Co., Ltd.
Abstract: A method for recycling waste lithium iron phosphate is by selective oxidation-reduction, to obtain recycled lithium iron phosphate, and a lithium ion battery. The method includes: primarily sintering waste lithium iron phosphate under a condition where a mild oxidizing gas is introduced; separating a lithium iron phosphate powder material; supplementing lithium and supplementing carbon to the lithium iron phosphate powder material and regulating the composition of the lithium iron phosphate powder material using a lithium source and a carbon source by secondary sintering to obtain recycled lithium iron phosphate, wherein the mild oxidizing gas is water vapor, CO2 gas, or a mixed gas thereof.
Type:
Application
Filed:
September 2, 2020
Publication date:
March 31, 2022
Applicant:
BTR (TIANJIN) NANO MATERIAL MANUFACTURE CO., LTD.