Patent ID: 8709298

Claim:
A compound of formula (I): A a M b P c O d (I) wherein M is at least one transition metal selected from the group consisting of Co, Ni, Mn, Fe, and Cr, optionally replaced by up to 20 mol % by Zn A is Li or Li x Na 1-x , optionally replaced by up to 10 mol % by K, Be, Mg, or Ca, P is optionally replaced by up to 10 mol % by B, Si, or As, x is from 0.2 to 1.0, a is from 3.5 to 4.5, b is from 0.8 to 1.2, c is from 1.8 to 2.2 and d is from 7.2 to 8.8 wherein d is four times as large as c.