Based on the anisotropic characteristics of Li+ions migration in Li2MnSiO4 structure,a hydrothermal method is proposed to synthesize the nano-grade needle-like Li2MnSiO4 crystals,which can regulate the preferential growth of the crystal plane and improve the electrochemical performance of Li2MnSiO4 cathode material.The crystal structure and morphology of the products are characterized by using X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).It is shown that the product displays a nanoneedle-like morphology(200 nm in length and 30 nm in width)with a specific face-exposed structure.Benefitting from the particular nanoneedle morphology,Li2MnSiO4 cathode materials exhibit good electrochemical performance,delivering a discharge capacity of 217.3 mAh·g-1 at 0.1 C.
lithium ion batterycathode materiallithium manganese silicateexposed crystallographic facetshydrothermal method
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