The lithium-ion battery anode material have been prepared from humic acid through high-temperature heat treatment. The morphology, microcrystalline structure and electrochemical properties of as-prepared activated material were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical testing system. The results indicated that the humic acid-based graphitized materials showed a more regular graphite lamellar structure, and the degree of graphitization of the materials was also getting higher and higher with the increase of graphitization temperature. The humic acid-based graphitized mate-rials all presented good electrochemical performance. The graphitized material with the temperature of 2 800 ℃ had a first discharge specific capacity of 356.7 mAh/g and a charge capacity of 277.6 mAh/g, and the initial coulombic efficiencies was 77.81%. The capacity retention rate after 50 cycles at 1C and 2C rates was as high as 99.4% and 95.9%, respectively. The above results suggest that the humic acid-based graphitized material is an ideal lithium ion battery anode material.
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2018, Vol. 32 
