关键词: 苯丙氨酸;负极活性材料;锂离子电池;电化学储锂性能

Abstract: In order to investigate electrochemical Li-storage activity of phenylalanine,the microstructure and morphology of phenylalanine were studied in terms of Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).When it was used as the anode active materials of lithium ion battery,the corresponding electrochemical performances were investigated by galvanostatic charge/ discharge,cycle voltammograms (CV) and alternating current (AC) impedance spectroscope.The results show that phenylalanine-based anode delivere the reversible discharge capacity of 55.2 mAh · g-1 at 0.1 C after 50 cycles;meanwhile,phenylalanine-based anode also display good cycle stability and rate performances,indicating good feasibility of organic phenylalanine anode in lithium ion battery.

Key words: phenylalanine;anode active material;lithium ion battery;electrochemical Li-storage performance