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摘要
以间苯二酚和甲醛合成间苯二酚甲醛树脂，并采用喷雾干燥法将纳米二氧化硅掺杂到间苯二酚甲醛树脂中，通过碳化法得到间苯二酚甲醛树脂基硬炭/二氧化硅复合材料RFHC/SiO2。以此材料作为锂离子电池负极材料对其电化学性能进行了研究。结果表明，复合材料RFHC/SiO2具有较大的比表面积（929.42 m2/g）和丰富的介孔结构，二氧化硅均匀分布在硬炭结构中；当SiO2质量分数为5%时，以复合材料RFHC/SiO2为锂离子电池的负极材料具有850 mA·h/g的高可逆容量，表现出良好的倍率性能。
Abstract
RF/SiO2 composite material is prepared through spray drying technology to dope nano-silica into resorcinol formaldehyde resin that is synthesized from resorcinol and formaldehyde.Then resorcinol-formaldehyde resin-based hard carbon/silica composite material (RFHC/SiO2) is obtained by carbonization of RF/SiO2 composite material.Structural characterization shows that RFHC/SiO2 composite exhibits a large specific surface area of 929 m2·g-1 and rich mesoporous structure.Moreover,silica distributes uniformly in hard carbon structure.As RFHC/SiO2 composite containing 5% of SiO2 is used as anode materials for lithium ion batteries,it shows a reversible capacity as high as 850 mA·h·g-1,showing a good rate performance.
关键词
硬炭
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电化学性能
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负极材料
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锂离子电池
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二氧化硅
Key words
hard carbon
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electrochemical performance
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anode materials
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lithium ion batteries
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silica
Author summay
邓仙梅(1993-),女,硕士研究生,研究方向为电化学,1246405164@qq.com
SiO2掺杂硬炭作锂离子电池负极材料的研究[J].
, 2020, 40(11): 82-86 DOI:10.16606/j.cnki.issn0253-4320.2020.11.017
