The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2015
Filed:
Sep. 06, 2013
Tsinghua University, Beijing, CN;
Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd., Shenzhen, CN;
Yu-Ming Shang, Beijing, CN;
Yao-Wu Wang, Beijing, CN;
Xiao-Feng Xie, Beijing, CN;
Shu-Bo Wang, Beijing, CN;
Jin-Hai Wang, Beijing, CN;
Yong-Gang Liu, Beijing, CN;
Xiao Zhao, Beijing, CN;
Jing-Bo Chen, Beijing, CN;
Mou Fang, Beijing, CN;
Tsinghua University, Beijing, CN;
HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Shenzhen, CN;
Abstract
A method for making lithium iron phosphate is provided. In the method, an alkali is reacted with a ferric salt in water to form a red colored ferric hydroxide precipitate in the water. The red colored ferric hydroxide precipitate is mixed with deionized water, organic solvent, and emulsifier to form an water-in-oil emulsion. The phosphoric acid solution and iron metal powder are added to the water-in-oil emulsion to form ferrous hydrogen phosphate. A lithium source is introduced to the water-in-oil emulsion and reacted with the ferrous hydrogen phosphate to form a precursor in the water-in-oil emulsion. The precursor is heated in a protective gas at a heating temperature in a range from about 600° C. to about 800° C. to form lithium iron phosphate.