Structural and electrochemical characterization of LiFePO4 synthesized by an HEDP-based soft-chemistry route

Synthesis of LiFePO4/carbon composite from nano-FePO4 by a novel stearic acid assisted rheological phase method

“…A great deal of effort has been made in the past decade to solve the conductivity problem. This goal has been achieved either by reducing the particle size and maintaining the particle size homogeneously distributed [8][9][10][11][12] or by coating the particle with thin layers of carbon [13][14][15][16][17] or conductive polymer [18,19]. Recently, Kang and Ceder synthesized a nano-sized LiFePO 4 sample coating a poorly crystallized thin layer of Fe 3+ -containing Li 4 P 2 O 7 with high Li + mobility by introducing an appropriate offstoichiometry in the sample.…”

Synthesis of LiFePO4/C cathode materials through an ultrasonic-assisted rheological phase method

“…However, the LiFePO 4 /C powder consisted of small particles in the range of 100-150 nm and size distribution was uniform. Compared to the traditional solid-state reaction route [25,26], or even the solution method [27,28], the particle size obtained by the present rheological phase method is much smaller and the size distribution uniform. As a powder with such small particles has a large specific surface area, the conclusion was drawn that this suitability for the convenient movement of lithium ions should enhance electrochemical performance.…”

“…Utilizing carbon-coating [7][8][9][10][11][12] and smaller particle sizes [13][14][15][16][17][18] have been attempted to overcome these drawbacks in using LiFePO 4 because a smaller LiFePO 4 particle size could shorten the diffusion length of the Li-ion, while carbon-coating would increase surface electronic conductivity. In addition to the traditional solid-state reaction synthesis routine, alternative synthesis processes including sol-gel, hydrothermal, co-precipitation, microwave heating, etc., have been continually developed [19][20][21][22].…”

Modified Solid-State Reaction Synthesized Cathode Lithium Iron Phosphate (LiFePO<SUB>4</SUB>) from Different Phosphate Sources

“…Brown and Figure 3 shows the XRD patterns of the prepared LiFePO 4 from sample a and b, which are consistent with the standard XRD patterns (JCPDS card, 01-083-2092), indicating that the olivine phase was prepared by this distilled-water wetted solid-state reaction. 19 The intensity of the XRD patterns for sample b (prepared from NH 4 H 2 PO 4 is stronger than that for sample a. That is to say, the crystallinity of sample b is better than that of sample a.…”