Method of synthesizing phosphate salt of high purity

The present invention provides a cost-effective method of synthesizing phosphate salt of a metal such as Fe and Mn that can be used for electrode active material of a lithium secondary battery. A precipitation reaction is first carried out to produce a solid salt of the metal having a lower valence...

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Bibliographic Details
Main Authors Mo, Boshan, Huang, Guiqing, Mo, Youde
Format Patent
LanguageEnglish
Published 08.01.2019
Subjects
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS THEREOF
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The present invention provides a cost-effective method of synthesizing phosphate salt of a metal such as Fe and Mn that can be used for electrode active material of a lithium secondary battery. A precipitation reaction is first carried out to produce a solid salt of the metal having a lower valence value, e.g. Fe(II) and Mn(II). The solid salt is then purified before it is oxidized to form the target phosphate salt of the metal having a higher valence value, e.g. Fe(III) and Mn(III). The invention exhibits numerous technical merits such as easier operation, higher purity, and less consumption of washing water, among others.
Bibliography:Application Number: US201715586715