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人造负极材料包覆工艺沥青多影响哪些性能

2025-03-14 04:55:54

推荐回答（1个）

回答1：

以酚醛树脂包覆天然微晶石墨,经炭化处理制备得到锂离子电池用酚醛树脂炭包覆石墨负极材料。系统考察了酚醛树脂炭包覆量对微晶石墨晶体结构和电化学性能的影响。结果表明,酚醛树脂炭改善了天然微晶石墨的表面形貌,但未改变其晶体结构;包覆适量酚醛树脂炭可以提高负极材料的首次充放电效率,并且可以明显改善其大电流充放电下的循环性能。酚醛树脂包覆量为4%的酚醛树脂炭包覆石墨的首次充放电效率为81.4%,在0.5C的电流密度下经过50次循环后仍有257.9mAh/g的脱锂容量。

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