An investigation of polypyrrole-LiFePO<inf>4</inf>composite cathode materials for lithium-ion batteries
- Publication Type:
- Journal Article
- Electrochimica Acta, 2005, 50 (24), pp. 4649 - 4654
- Issue Date:
A series of polypyrrole-LiFePO4(PPy-LiFePO4) composites were synthesised by polymerising pyrrole monomers on the surface of LiFePO4particles. AC impedance measurements show that the coating of polypyrrole significantly decreases the charge-transfer resistance of LiFePO4electrodes. The electrochemical reactivity of polypyrrole and PPy-LiFePO4composites for lithium insertion and extraction was examined by charge/discharge testing. The PPy-LiFePO4composite electrodes demonstrated an increased reversible capacity and better cyclability, compared to the bare LiFePO4electrode. © 2005 Elsevier Ltd. All rights reserved.
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