以废隔膜为前体, 通过一步热解碳化制备碳负极材料, 考察了温度和时间对碳化产物的影响, 并研究了碳负极材料的电化学储锂性能。结果表明, 废隔 膜的最佳碳化温度为420 ℃, 碳化时间为120 min; 用作锂离子电池负极材料时, 在50 mA/g低电流密度充/放电时的可逆放电比容量高达543.8 mAh/g; 即使在 高电流密度2000 mA/g循环1000圈后, 可逆放电比容量仍可稳定在125.0 mAh/g左右, 表现了良好的电化学储锂性能。该研究结果不仅有助于缓解废旧隔膜对环 境产生的危害, 而且能充分发挥废弃资源中的利用价值、降低电极材料的制备成本。

Carbon anode materials were extracted by one step pyrolysis carbonization of waste separator films, then the effects of the temperature and the time on the carbonization products were also investigat. The results suggest that the optimized temperature and time were 420 ℃ and 120 min during the pyrolysis carbonization of the waste separator films, respectively. As the anode in lithium ion battery, the reversible discharge specific capacity of carbon anode was as high as 543.8 mAh/g at low current density of 50 mA/g; even cycling at high current density of 2000 mA/g for 1000 cycles, the reversible discharge specific capacity could remain 125.0 mAh/g, indicating satisfactory electrochemical Li-storage performances. These results would not only facilitate to alleviate the harm of waste separator film to the environment but also make full use the utilization value of waste resource and reduce the preparation cost of the electrode materials.