用不同的方法在石墨的表面包覆上一层酚醛树脂,然后在N2保护下1 000 ℃炭化1 h制得复合炭材料,并用扫描电子显微镜(SEM)对其表面物理形态进行观察分析,研究了复合炭材料的恒电流充放电性能.包覆在石墨表面的具有无定形结构的酚醛树脂炭能够有效阻止石墨在充放电过程中发生层状剥落,从而提高复合炭材料的循环稳定性,其中通过沉淀法制得的复合炭材料(CPG-30)在十次循环后可逆容量为326 mAh·g-1,比石墨高45 mAh·g-1,并保持了首次可逆容量的96.2 %.
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