首页|可重排聚酰亚胺基碳纳米纤维的制备与电化学性能

可重排聚酰亚胺基碳纳米纤维的制备与电化学性能

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为了开发具有可持续环境友好型超级电容器储能装置,本文以自制的9,9'-双[4-(4-硝基-3-羟基苯氧基)苯基]芴(BAHPPF)和均苯四甲酸二酐(PMDA)为单体,采用低温缩聚反应制备聚酰胺酸(PAA)溶液,再通过静电纺丝技术制备出PAA纳米纤维.之后,经热酰亚胺化、热重排以及碳化处理制得可重排聚酰亚胺基碳纳米纤维(RPICNFs).采用红外光谱、扫描电子显微镜、热重分析、X射线衍射、拉曼光谱、氮吸附和电化学性能测试等手段研究PAA溶液质量分数和碳化温度对RPICNFs的微观结构和电化学性能的影响.实验结果表明,当PAA溶液质量分数为25%、碳化温度为800℃时,制备的RPICNF-800-25试样表现出611.06 m2/g的比表面积和0.391 cm3/g的孔体积.当电流密度为0.5 A/g时,RPICNF-800-25的比电容达到171.3 F/g,且在10 A/g时仍保持初始电容的70%,具有较好的倍率性能.
Preparation and electrochemical properties of polyimide-based carbon nanofibers
In order to develop a sustainable and environmentally friendly supercapacitor energy storage de-vice,a kind of poly(amic acid)(PAA)solution is synthesized by low-temperature condensation reaction us-ing self-made 9,9'-bis[4-(4-nitro-3-hydroxyphenoxy)phenyl]fluorene(BAHPPF)and phthalic anhydride(PMDA)as monomers,and the PAA nanofibers are prepared by electrospinning technology.Then,the rear-rangeable polyimide-based carbon nanofibers(RPICNFs)are prepared by thermal imidization,thermal rear-rangement,and carbonization treatment.The effects of PAA solution concentration and carbonization tempera-ture on the microstructure and electrochemical properties of RPICNFs are studied by using infrared spectrosco-py,scanning electron microscopy,thermogravimetric analysis,X-ray diffraction,Raman spectroscopy,ni-trogen adsorption,and electrochemical performance testing.The experimental results show that when the mass fraction of PAA solution is 25%and the carbonization temperature is 800℃,the as-prepared RPICNF-800-25 sample exhibits a specific surface area of 611.06 m2/g and a pore volume of 0.391 cm3/g.At a current density of 0.5 A/g,the specific capacitance of RPICNF-800-25 is 171.3 F/g,and it still maintains 70%of the initial capacitance at 10 A/g,demonstrating a good rate performance.

polyimiderearrangeablecarbon nanofiberselectrochemical properties

刘淼、许文浩、鲁云华、肖国勇、胡知之

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辽宁科技大学 化学工程学院,辽宁 鞍山 114051

聚酰亚胺 可重排 碳纳米纤维 电化学性能

辽宁省教育厅项目

LJKMZ20220659

2024

辽宁科技大学学报
辽宁科技大学

辽宁科技大学学报

影响因子:0.349
ISSN:1674-1048
年,卷(期):2024.47(4)