本发明公开了一种Si/C纳米复合阳极材料的制备方法，将酚醛树脂作为碳源加入到丙酮中，不断搅拌直到变成乳白色，之后向混合乳液中加入硅纳米颗粒，将得到的混合溶液进行超声，之后连续搅拌24h，将溶液蒸干，并在60℃真空下进行提取和干燥，得到Si/C纳米复合前驱体；将其在惰性气氛下进行热解，热解温度为800～1000℃，热解时间4～5h，冷却至室温后，将热解产物进行研磨到微米级，得到Si/C纳米复合阳极材料。本发明采用酚醛树脂作为碳源，结合超声法制备含纳米硅的多孔炭，碳的孔隙和碳层之间丰富的空间为碳和锂离子的反应提供了更多的界面，从而大大提高硅的电化学性能，减少容量下降，经测试比容量高达880mA h g‑1，电流密度为100mA g‑1，循环500次后仍有容量保持率。
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[ DB ] CONNECT:[ UseTime:0.001248s ] mysql:host=pc-m5epcw1px949b110u.rwlb.rds.aliyuncs.com;port=3306;dbname=yousedb;charset=utf8
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[ SQL ] SELECT * FROM `tb_para` WHERE `id` = 1 LIMIT 1 [ RunTime:0.001290s ]
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[ SQL ] SHOW COLUMNS FROM `tb_category` [ RunTime:0.000977s ]
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[ SQL ] SELECT * FROM `tb_category` WHERE `id` = 30 LIMIT 1 [ RunTime:0.000817s ]
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[ SQL ] SELECT `id`,`title` FROM `tb_tech` WHERE `id` > 905276 AND `check_status` = 1 AND `category_id` = 147 ORDER BY `submit_date` ASC LIMIT 1 [ RunTime:0.002275s ]
[ SQL ] SELECT `id`,`title` FROM `tb_tech` WHERE `id` < 905276 AND `check_status` = 1 AND `category_id` = 147 ORDER BY `submit_date` DESC LIMIT 1 [ RunTime:0.011832s ]
[ SQL ] select id,title,tag,submit_date from tb_tech where check_status=1 and id<>905276 order by submit_date desc limit 10 [ RunTime:0.003881s ]
[ SQL ] SHOW COLUMNS FROM `tb_mcc` [ RunTime:0.001375s ]
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[ SQL ] SHOW COLUMNS FROM `tb_industry_report` [ RunTime:0.001167s ]
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