纳米碳颗粒作为锂离子电池负极材料的研究

石墨化碳具有充放电容量高、循环性能稳定等特点,是最有商业应用价值的锂离子电池负极材料之一,所以改性的碳负极材料一直是研究的重点.用TEM,HRTEM对用电弧放电法制备的纳米碳颗粒进行结构表征,并将其用作锂离子电池负极材料研究其电化学性能.研究结果表明,纳米碳颗粒负极具有较高的初次充电容量,达到了710mAh/g.但是初次放电效率低,不可逆容量损失大,在锂离子电池应用上还存在很多缺陷.必须对其加以改善使之成为一种较好的锂离子电池负极材料.

Study on Carbon Nanoparticles for Anode Materials of Lithium-Ion Battery

Graphite carbon anode is one of commercially available products because of its high charge/discharge capacity and steady cyclic property. As a result, modification of carbonaceous anode materials has been a research focus. The microstructure of the carbon nanoparticles were characterized by means of transmission electron microscope (TEM), high-resolution transmission electron microscope (HRTEM). Also the properties of carbon nanoparticles used as anode of lithium ion battery were discussed. It shows that carbon nanoparticles have high first charge capacity, which is 710mAh/g. But its first ratio of discharge is very low and the irreversible capacity is very high. It has some disadvantage for anode material of lithium ion battery. we must give it some proper modification to make it become a promising anode material for lithium ion battery.