石墨化无烟煤基锂离子电池负极材料研究

Study on graphitized anthracite as anode material for lithium ion batteries

以宁夏石嘴山太西无烟煤为原料,经过粗碎、磨粉和石墨化等简单工艺制备了无烟煤基锂离子电池负极材料。测试结果表明,石墨化无烟煤基负极具有92.23%的石墨化度,表现出340.2 mA·h/g的可逆容量,与煅前石油焦基石墨负极容量相当。与针状焦基石墨负极相比较,无烟煤基石墨负极虽然克容量较低,但在电池的循环稳定性方面具有较大优势。

The anthracite-based graphite anode material for lithium ion batteries from Shizuishan in Ningxia was obtained through crush, grinding and graphitization. And the electrochemical performance of the obtained anode material was investigated. The results indicate that the graphitized anthracite(GA) has a graphitization degree of 92.23%, and has a reversible capacity of 340 mA·h/g,which is comparable to the capacity of graphitized petroleum coke. In comparison with graphitized needle coke, GA has a lower reversible capacity, but shows more superior cycling stability. So graphitized anthracite-based anode material is suitable for lithium ion batteries in electric vehicles, owing to its low cost, simple technology and excellent cycling stability.