材料科学
聚苯胺
超级电容器
纳米纤维
复合数
电磁屏蔽
复合材料
纤维素
电磁干扰
纳米复合材料
电容
聚合物
化学工程
电子工程
电极
聚合
工程类
物理化学
化学
作者
Chuanyin Xiong,Congmin Zheng,Zhao Zhang,Qingyu Xiong,Qiusheng Zhou,Dongping Li,Mengxia Shen,Yonghao Ni
标识
DOI:10.1016/j.jmat.2024.01.015
摘要
Recently, multifunctional materials have received widespread attention from researchers. Cellulose nanofibers (CNF) is one of biomass materials with abundant hydroxyl groups, which shows great potential in manufacturing multifunctional composite material. In this paper, a kind of polyaniline@CNF/polyvinyl alcohol-H2SO4 multifunctional composite material (PANI@CNF/PVA-H2SO4) was successfully designed by in-situ chemical polymerization of conductive polyaniline (PANI) onto CNF aerogel with high aspect ratio, and then coated with PVA-H2SO4 gel. The composite material has a specific capacitance of 502.2 F/g at a scan rate of 5 mV/s as supercapacitor electrode. Furthermore, when the composite was assembled into a symmetrical supercapacitor, it can still provide an energy density of 11.49 W h/kg at a high power density of 413.55 W/kg. Besides, the as-obtained PANI@CNF/PVA-H2SO4 composite has an excellent electromagnetic shielding performance of 34.75 dB in X-band. In addition, due to the excellent flexibility of CNF and PVA, the PANI@CNF/PVA-H2SO4 composites can be further applied to stress sensors to detect pressure and human motion signals.
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