Carbon nanotube- and graphene-based nanomaterials and applications in high-voltage supercapacitor: A review
Carbon nanotube- and graphene-based nanomaterials and applications in high-voltage supercapacitor: A review
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DOI：
10.1016/j.carbon.2018.10.010
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发表时间：
2019
期刊：
影响因子：
10.9
通讯作者：
Zhoufei Yang;Jiarui Tian;Zefang Yin;Chaojie Cui;W. Qian;F. Wei
中科院分区：
文献类型：
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作者：
Zhoufei Yang;Jiarui Tian;Zefang Yin;Chaojie Cui;W. Qian;F. Wei
使用碳纳米管和石墨烯基纳米材料作为高性能电极是开发具有高功率密度和高能量密度的高压超级电容器的有前途的方向之一。然而，高纯度的碳纳米管/石墨烯基纳米材料的大规模生产和后处理是高性能超级电容器商业化的必要步骤，并且还需要考虑将碳纳米管/石墨烯基纳米材料工程化用于设备级超级电容器的挑战。本文首先介绍了碳纳米管/石墨烯基纳米材料的化学气相沉积大规模制备方法和石墨烯的剥离方法，然后介绍了这些纳米材料的纯化方法。然后，讨论了碳纳米管/石墨烯基纳米材料在高压窗电解液中的电容性能，包括sp2碳材料电容极限的讨论，以及在离子液体电解液和有机电解液中电容性能的比较和低温性能的讨论。最后，在制造超级电容器装置，如过量的液体的摄入，致密化的碳纳米管/石墨烯基电极，和超级电容器的电阻的降低，解决的挑战。
The use of carbon nanotube- and graphene-based nanomaterials as a high-performance electrode is one of the promising directions when it comes to developing high-voltage supercapacitors with both a high power density and high energy density. However, the mass production and post-treatment of the carbon nanotube/graphene-based nanomaterials with high purity are necessary steps toward the commercialization of high-performance supercapacitors, and the challenges in engineering carbon nanotube/graphene-based nanomaterials for device-scale supercapacitors also need to be considered. In this review, the authors first introduce the chemical vapor deposition for large-scale preparation of carbon nanotube/graphene-based nanomaterials and the exfoliation method for graphene, which are followed by the methods used to purify these nanomaterials. Then, the capacitance performance of the carbon nanotube/graphene-based nanomaterials in the electrolytes of a high-voltage window is discussed, including the discussion of the capacitance limit of sp2carbon materials, as well as a comparison of the capacitance performance in ionic liquids electrolytes with that in organic electrolytes and a discussion of low-temperature performance. Finally, the challenges in fabricating supercapacitor devices, such as the intake of excess liquids, the densification of carbon nanotube/graphene-based electrodes, and the reduction of the resistance of supercapacitors, are addressed.