LAUSR

Abstract Simple co-precipitation synthesis procedure yielding nanometric LiFePO 4 with enhanced electrochemical properties without any post-synthesis heat treatment is presented. XRD, SEM and TEM analysis of the obtained powders revealed platelet crystallites and well crystalized bulk structure. Effective way of decreasing amount of Fe 3+ containing phases by addition of reducing agents (KI, (NH 4 ) 2 S 2 O 3 , glucose and the atmosphere of 5%H 2 −95%Ar) during low-temperature (107 °C) synthesis is described. The traditional analytical chemistry methods or the Mӧssbauer spectroscopy methods revealed that utilization of selected reducing agents diminished Fe 3+ concentration from 25 to 12 at%. The constructed cells with optimized LiFePO 4 as a cathode material showed superior electrochemical performances, including high reversible capacity up to 162 mAh/g at C/10 current discharge rate, flat voltage plateau with a value close to 3.45 V vs. Li 0/+ .