Patent ID: 9252421
Filing Date: 2016-02-02
CPC Classification: B05D,C07F,H01M,Y02E

Claim Text:
1. A method of forming a surface layer on negative electrode active material structures for a lithium ion battery, the method comprising: receiving the negative electrode active material structures, wherein the negative electrode active material structures are lithium titanium oxide; and combining the negative electrode active material structures with a liquid to form a mixture, adding a surface reagent into the mixture, wherein the surface reagent is an oxy-silane, the oxy-silane forming the surface layer covalently bound to the negative electrode active material structures, wherein the oxy-silane covalently bonds with titanium oxides of the lithium titanium oxide, the surface layer reducing reactivity of the negative electrode active material structures with respect to electrolyte components, and wherein the mixture comprising the oxy-silane is a slurry, the oxy-silane bonding with the lithium titanium oxide in the slurry to form the surface layer, the surface layer comprising siloxane.