▎ 摘　　要

NOVELTY - Lithium iron manganese phosphate precursor (I) is new. USE - (I) is useful for preparing lithium iron manganese phosphate anode material and electrode, and in electrode material and lithium-ion battery (all claimed). ADVANTAGE - The lithium manganese iron phosphate precursor has secondary ball particle structure formed by primary particles, the elements in the precursor are uniformly distributed, the doped element enters the metal site to form nano particles with stable structure, surface of nano-particle surface is coated with carbon forming compact spherical aggregate; and has compact secondary ball shape, high compaction density, improves the electrochemical performance of the battery, high specific capacity, and excellent cycle performance. DETAILED DESCRIPTION - Lithium iron manganese phosphate precursor of formula ((NH4)Mn1-x-yFexMyPO4.H2O/C) (I) is new. x = 0.1-0.6; y = 0-0.04; and M = Mg, Co, Ni, Cu, Zn or Ti. INDEPENDENT CLAIMS are also included for: (1) Preparation of (I); (2) Lithium iron manganese phosphate anode material of formula (LiiMn1-x-y-zFexMyM'z(PO4)1-nNn/C) (II); (3) Preparing lithium iron manganese phosphate anode material, comprising (i) providing lithium iron manganese phosphate precursor, (ii) mixing and homogenizing the lithium iron manganese phosphate precursor, the lithium source, the second carbon source, the M' source and/or the N source in presence of solvent to obtain second slurry, and (iii) removing the solvent in the second slurry to obtain dry material, and then calcining the dry material under the protection of inert atmosphere to obtain lithium iron manganese phosphate anode material; (4) Electrode material comprising active material, conductive agent and binder, where active material is lithium iron manganese phosphate anode material; (5) Electrode comprising current collector and electrode material coated and/or filled on the current collector; (6) Preparing electrode, comprising coating and/or filling current collector with slurry containing active material, conductive agent and binder and solvent, drying, calendering or not calendering, where active material is the lithium iron manganese phosphate anode material; and (7) Lithium-ion battery comprising electrode group and electrolyte, the electrode group and the electrolyte is sealed in a battery casing, where electrode group includes anode, cathode and separator, and the separator is located between the anode and cathode. z = 0-0.04; i = 0.9-1.2; n = 0-0.04; M = Mg, Co, Ni, Cu, Zn and Ti; M' = Mg, Ca, Sr, Ti, V, Cr, Co, Ni, Cu, Zn, Zr, Y, Mo, Nb, B, Al, W, La and Sm; N = F and/or Cl.