Synthesis of LiFePO4 by In Situ Polymerization Restriction Method for Pouch-Typed Cell

Аннотация

We report a two-step approach to synthesize nanosized LiFePO₄C composite by an in situ polymerization restriction method. First step, the Fe₂O₃@polyaniline is fabricated with in situ polymerization method. Secondly, the as-obtained Fe₂O₃ coated with polyaniline is mixed with LiH₂PO₄, followed by carbothermal reduction process. The outer polyaniline shell coating Fe₂O₃ can restrict the aggregation of particles and serves as carbon-containing precursor. The studies of electrochemical performances were carried out at full cell level. The results show that the assembled pouch-typed full-cells with as-obtained LiFePO₄ present excellent rate capability and cycle life.