Patent ID: 9512357
Filing Date: 2016-12-06
CPC Classification: C09K,F21K,H01L

Claim Text:
1. A population of particles having a core which is substantially free of Mn 4+ ions, a first shell and a second shell, wherein the core comprises a compound of formula (II) the first shell comprises a composition of formula (IV) and the second shell comprises a composition of formula (V) wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is 1, 2 or 3 and is equal to the absolute value of the charge of the [MF y is 5, 6 or 7; and 0<z≦0.2; and 0≦w≦z.