Electrode material, a battery electrode, method of producing them, nonaqueous electrolyte battery and battery pack

摘要

According to one embodiment, there is provided an electrode material. The electrode material includes an active material which includes a titanium oxide compound having a monoclinic titanium dioxide crystal structure. The electrode material further includes a compound which exists on the surface of the active material and has a trialkylsilyl group represented by the formula (I).;
wherein R1, R2 and R3, which may be the same or different, respectively represent an alkyl group having 1 to 10 carbon atoms.

主权项

1. An electrode material comprising:
an active material comprising a titanium oxide compound having a monoclinic titanium dioxide crystal structure; and a compound which exists on a surface of the active material and has a trialkylsilyl group represented by the formula (I):wherein, R1, R2 and R3, which may be the same or different, respectively represent an alkyl group having 1 to 10 carbon atoms;
wherein the compound having the trialkylsilyl group is at least one selected from phosphoric acid compounds containing the trialkylsilyl group and boric acid compounds containing the trialkylsilyl group; and when a surface of the electrode material is measured by time-of-flight type secondary ion mass-analysis method, a peak intensity ratio (I1/I2) satisfies the equation (II):
3.30≦I1/I2  (II)wherein I1 is a peak intensity of Si(CH3)3+ and I2 is a peak intensity of Ti+.