Li 2 FeSiO 4 coated by sorbitanlaurat-derived carbon as cathode of high-performance lithium-ion battery

• DOI: 10.1016/j.electacta.2015.02.102
• Publication Date: 2015-02-14T00:35:09Z
• Authors: Long Qu; Yi Liu; Shaohua Fang; Li Yang; Shin-ichi Hirano
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Abstract Low-cost sorbitanlaurat is used as new carbon source to synthesize Li 2 FeSiO 4 /C by sol–gel method. Four Li 2 FeSiO 4 /C products with different carbon contents are pursued as the cathode material of lithium-ion battery. The structures and morphologies of these products are characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. The particle size of these Li 2 FeSiO 4 products is about 10–20 nm. The product with 8.4 wt% carbon delivers an initial discharge capacity of 187 mA h g −1 at 0.1 C. This product also exhibits good rate and cycle performances. By Raman spectroscopy, cyclic voltammogram and impedance spectroscopy, the factor which can affect the rate performance of these Li 2 FeSiO 4 /C products is analyzed.