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磷酸活化对炭气凝胶结构和电化学性能的影响

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摘要 采用溶胶-凝胶法,以间苯二酚(R)和甲醛(F)为原料,无水乙醇作溶剂,六次甲基四胺(HMTA)作催化交联剂,通过常压干燥和高温炭化工艺制备炭气凝胶。并采用磷酸活化法调整炭气凝胶的孔结构,探讨了磷酸活化对炭气凝胶孔结构和电容特性的影响。结果表明,磷酸活化可以有效地增加炭气凝胶的比表面积、总孔容和微孔孔容,但同时中孔孔容和平均孔径有所下降。增加的微孔比表面积主要由部分塌陷的中孔贡献。磷酸活化后炭气凝胶在有机电解质溶液中的比容量显著增加,但在大电流密度充放电时比容量下降较多。
出处 《甘肃科技》 2015年第22期55-57,共3页 Gansu Science and Technology
基金 湖南工业职业技术学院项目(GYKYZ2013005)资助 湖南省教育厅资助项目(14C0365)资助
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