Farasis Energy (Ganzhou) Co., Ltd.

Michael Slater

Floris Y Tsang

Robbert M Vermeulen

Keith Douglas Kepler

Hongjian Liu

Phillip Hailey

A composite for the cathode of Li-ion battery is disclosed and comprises: a base active material represented by Li(NCoMn)Owherein 0&#x2264;a&#x2264;0.5, 0&#x2264;b&#x2264;0.4, 0&#x2264;c&#x2264;0.6, with b+c&#x3c;1; and a coating on the base active material comprising a phase containing the components BOor SnBOF; wherein 0&#x2264;x&#x2264;5, 0&#x3c;y&#x3c;4+3x; wherein relative to the total amount of the base active material, the weight percentage of B element is not more than 2 wt %, the weight percentage of Sn element is not more than 5 wt %. A method for making a composite is disclosed and includes: mixing the base active material with the phase components and/or a precursor for the phase components; and firing the mixture obtained. The application provides a high capacity, long cycle life cathode material that is stabilized at high voltages.

Composite for cathode of Li-ion battery, its preparation process and the Li-ion battery

Li-ion cathode materials with improved performance characteristics and precursors to prepare such materials are disclosed. The precursors consist of complex, mixed alkali transition metal oxides of the formula LiA(MnNiM)O, where M represents one or more selected from transition metal elements beside Ni and Mn, and the groups IIA and IIIA elements of the periodic table, x is between 1 and 1.4, y is between 0.1 and 0.5, and x+y is between 1.1 and 1.5, a+b+c=1, the value of d depends on the proportions and average oxidation states of the cation elements Li, A, Mn, Ni and M such that the combined positive charge of the cation elements is balanced by the number of oxygen anions, A represents one or more elements selected from Na, K and Cs. The Li-ion cathode materials are produced by exchange of element(s) A for Li under mild conditions to limit the degree of structural reorganization that occurs during the reaction.

Growing community of inventors

Oakland, CA, United States of America

Michael Slater