锂离子电池纳米碳负极材料的结构与嵌锂行为

采用了一种工业副产品的纳米碳粉作为锂离子电池的负极材料,对纳米碳粉进行了提纯,测定了纳米碳粉的纯度,并对提纯后的纳米碳粉进行了电化学嵌锂性能的研究·充放电实验结果表明,该碳材料首次放电比容量为358 3mA·h/g,首次循环可逆容量为336 4mA·h/g,循环9次后可逆容量保持率为76 1%·TEM观察纳米碳粉的形貌,表明纳米碳粉为球形,直径在30nm左右;XRD测定纳米碳粉的结构,纳米碳粉的d002值介于石墨和软碳材料的d002值之间,为0 3481nm·

Structure and Li-Embedding Behavior of Lithium Cells Reusing Carbon Nanopowder as Cathode Material

An industrially by-product carbon nanopowder was reused as the raw material to make cathodes of lithium cell for the purpose of reducing cost and improving performance. After the purification of the carbon nanopowder, its purify was measured with an electrochemical investigation done for the lithium embedding behavior. The results of charge/discharge test showed that for the nanopowder the discharging specific capacity was 358.3mA·h/g, the first rechargeable capacity was 336.4 mA ·h/g and 76.1% of rechargeable capacity could be held on after the 9th recharging actions done. The TEM result showed that the morphology of the nanopowder particles were spherical with a diameter about 30 nm, and the XRD result showed structurally that its interlayer distance, d002 was 0.3481 nm, i.e., between that of graphite and of soft carbon.