硼化酚醛树脂炭材料的制备及嵌锂性能

Preparation of Boron-doped Carbon Materials and Their Lithium-intercalation Performance

采用化学法制备含B酚醛树脂热解炭材料,比较了不同热解温度及B的掺杂对炭材料微观结构及嵌锂性能的影响。结果表明:H3BO3的加入及热解温度的提高,可提高炭材料的石墨化程度;含B炭材料的首次充放电比容量及充放电效率高于纯炭材料;600℃时含B炭材料循环5次后可逆比容量为423 mAh/g,大于石墨电极的理论比容量372 mAh/g。

The boron-containing phenolic resin pyrolysis carbon material was prepared by chemical method. The influences of pyrolysis temperature and doping on microscopic structure and lithium-intercalation performance were studied. The results showed that adding H3 BO3 and increasing the pyrolysis temperature enhanced the graphitization of the material. The efficiency and capacity of the boron-doped carbon material are higher than those of pure carbon materials at the first charge and discharge cycle. After 5 charge/discharge cycles, the reversible capacity of the boron-doped carbon material is 423 mA·h/g when the pyrolysis temperature was 600℃. The reversible capacity of the boron-doped carbon material is greater than the theoretical capacity of pure carbon electrode which is 372 mA·h/g.