【摘要】 以液相浸溃法在天然鳞片石墨（NFG）表面包覆酚醛树脂后进行热处理,制备了酚醛树脂炭包覆石墨材料,将这种材料作为锂离子电池的负极材料,运用恒电流充、放电法、粉末微电极循环伏安法考察了其在1 mol/L LiPF₆/（EC+DEC）（1:1）电解液中的充、放电性能,并分析了工艺条件中最高热处理温度（T_max）对其充、放电性能的影响,实验结果表明,经T_max=900℃热处理的酚醛树脂炭包覆石墨材料的第3次稳定放电容量（D₃）为213.75 mA·h/g,第3次充、放电效率（η₃）为88.69％,循环寿命达800次以上,可作为高性能锂离子电池的负极材料。更多还原

【Abstract】 The materials were prepared by coating the phenol formaldehyde resin on the surface of the natural flake graphite （NFG） powders using liquid-phase-impregnation and pyrolysis. The charging-discharging performance of the materials used as the negative electrode for lithium ion batteries in 1 mol/L LiPF₆/（EC+ DEC）（ 1 : 1） electrolyte solution was investigated by means of the galvanostatic charging-discharging experiments and the cyclic vohammetry experiments. The influence of the maximum heat treatment temperatures (T_max) on the charging-discharging behaviour of this kind of materials was discussed. The results show that the charging-discharging characteristics of the material heat-treated under 900℃ are as follows: the third stable discharging capacity （ D₃ ） is 213.75 mA" h/g, the third cycling efficiency （ η3 ） is 88.69%, and the cycling life is more than 800 times. It can be used as the negative electrode for the high-performance lithium ion batteries.更多还原