Preparation and electrochemical characterisation of polypyrrole-coated Li2SnO3 anode materials for lithium-ion batteries

摘要: Polypyrrole-coated Li2SnO3 (Li2SnO3/PPy) nanocomposite has been prepared by a micro emulsion polymerisation. The X-ray diffraction and transmission electron microscopy analysis reveals that the crystal particles with uniform block structure are coated PPy amorphous behaviour. particle sizes of in range from 40 to 50 nm clear lattice fringes. Fourier transform infrared spectroscopy photoelectron surface binding nature elements Li2SnO3/PPy composite. Electrochemical measurement suggests exhibits better cycling properties lower initial irreversible capacities than as anode materials for lithium-ion batteries. At current density 60 mA/g voltage about 0.01–2.0 V, first discharge–charge 1482.2 892.1 mAh/g, whereas they 2104.5 1417.0 mAh/g Li2SnO3. retention capacity (560.1 mAh/g) is higher (510.2 mAh/g) after 50 cycles.