Lithium transition metal phosphate secondary agglomerates and process for its manufacture

The present invention relates to a Lithium-transition-metal-phosphate compound of formula Li 0.9+x Fe 1-y M y PO 4 ) in the form of secondary particles made of agglomerates of primary particles wherein the primary particles have a size in the range of 0.02-2 µm and the secondary particles a mean size in the range of 10-40 µm, a BET surface of 6-15 m 2 /g and a bulk density of 800-1200 g/l, a process for its manufacture and the use thereof.