酒糟基多孔碳在锂离子电池负极中的应用

Application of lees-based porous carbon in lithium-ion battery anode

以废弃酒糟为前驱体,采用“高温碳化+SiO_(2)致孔法”制备出了多孔石墨化碳材料,其应用于锂离子电池负极材料具有良好的电化学性能。通过扫描电子显微镜(SEM)、热重分析仪(TG)、氮气吸脱附(BET)和X射线衍射(XRD)等表征方法对所制备的碳材料进行分析。结果表明,在700℃下进行煅烧并通过NaOH去除碳材料中的SiO_(2)颗粒后,能得到高比表面积(945.61 m^(2)·g^(-1))的多孔碳材料,在100 mA·g^(-1)的电流密度下,首次充电比容量达到1657.53 mAh·g^(-1),循环2000圈后仍保持在1200 mAh·g^(-1)左右,表现出良好的倍率性能和循环稳定性。

Using the waste lees as the precursor,the porous graphitized carbon materials were prepared by “high temperature carbonization and the aperture is made through SiO_(2)”,which have good electrochemical performance when applied to the negative electrode material of lithium-ion battery.The prepared carbon materials were analyzed by scanning electron microscope(SEM),thermogravimetric analyzer(TG),nitrogen adsorption and desorption(BET) and X-ray diffraction(XRD) and other characterization methods.The results show that porous carbon materials with high specific surface area(945.61 m^(2)·g^(-1)) and higher degree of graphitization can be obtained after calcining at 700 ℃ and removal of SiO_(2) particles in carbon materials by NaOH aqueous solution.The first charge specific capacity reaches 1657.53 mAh·g^(-1) at a current density of 100 mA·g^(-1),and it remains around 1200 mAh·g^(-1) after 2000 cycles,showing good rate performance and cycling stability.