负载石墨烯-银纳米粒子的碳纳米纤维材料的应用研究
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摘要
超级电容器是一种新型储能装置,因其充电时间短、使用寿命长、温度特性好、节约能源和绿色环保等特点受到很大的关注~([1])。超级电容器的应用前景是诱人的,人们对它的探索也越来越深入。但是,我们对超级电容器的电容要求越来越高,其能量存储率有限。因此研究者们对其提出了一种解决方法:可在碳纳米纤维中添加纳米粒子,例如铂金属粒子~([2])、石墨烯粒子~([3])和钴金属粒子~([4])等。本研究先通过改进Hummers方法制备得到GO,再通过分子间的范德华力在GO表面负载Ag~+,最后再使用柠檬酸钠作还原剂还原得到石墨烯-银纳米粒子(RGO-Ag NPs)。最终将这种纳米粒子混合在聚丙烯腈溶液中应用静电纺丝技术制备负载石墨烯-银纳米粒子的碳纳米纤维(CNF-RGO/AgNPs)。CNF-RGO/AgNPs在放电电流密度为1A·g~(-1)下最大比电容可达到226.9F·g~(-1)。这种纳米纤维材料电存储能力得到了极大的提高,有望在超级电容器领域得到极大运用。
引文
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