Preparation and Electrochemical Performance of Ginkgo Leaf Based Hard Carbon Lithium Ion Battery Negative Electrode Materials
The preparation and property of the anode materials of Li ion battery were carried out by carbonization of Ginkgo biloba leaves(GL)using FeCl3 as activation agent.The effect of carbonization temperature on the structure and the electrochemical performance of anode materials was systemically explored.The results demonstrated that the pore structure of anode materials from Ginkgo biloba leaf was improved at the optimized temperature 600℃.The first discharge specific capacity and first Coulombic efficiency of as-prepared product were 941 mAh·g-1 and 61.63%,respectively under a current density of 0.1 A·g-1 and a voltage range of 0.01～3.00 V.The specific discharge capacity and Coulombic efficiency of anode materials were 453.5 mAh·g-1 and 98.75%respectively after 30 cycles of charging and discharging.
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