摘要
为了制备出兼具力学承载和能量存储功能的结构超级电容器(结构超电)复合材料,首先采用二维纳米片状材料MXene对碳纤维(CF)进行表面改性,制备出高性能的CF/MXene复合纤维电极并将其组装成超级电容器,接着采用嵌入法将其排布在玄武岩纤维增强织物中,通过灌注环氧树脂共形固化制备结构超电复合材料。系统分析了CF/MXene超级电容器的耐温稳定性及其覆膜处理的影响作用,并对制得结构超电复合材料的综合性能进行全面考察。结果表明,采用聚二甲基硅氧烷(PDMS)对CF/MXene超级电容器进行覆膜处理,能有效保护其经受60℃持续12 h加热处理后的储能稳定性;组装的结构超电的密度为0.19 g/cm^(3),比电容可达3.38 mF/g(0.05 A/g),能量密度和功率密度分别为15.5 mWh/kg和256.4 mW/kg,其弯曲强度和弯曲弹性模量分别可达到199.6 MPa和4.54 GPa,且弯曲破坏后结构超电的电容保持率仍高达91%。整体上,制备的结构超电复合材料具备质轻、高强、储能性能优良且稳定的特点。
In order to prepare the structural supercapacitor composites with mechanical bearing and energy storage functions,MXene was firstly used to modify the surface of carbon fiber(CF),a high-performance CF/MXene composite fiber electrode was prepared and assembled into supercapacitor.Then,it was arranged in basalt fiber reinforced fabric by embedding method,and the structural supercapacitor composites were prepared by pouring resin to cure conformally.The temperature stability of CF/MXene supercapacitor and the effect of coating treatment were systematically analyzed,and the comprehensive properties of the prepared structural supercapacitor composites were comprehensively investigated.The results show that the use of polydimethylsiloxane(PDMS)to coat the CF/MXene supercapacitor can effectively protect the energy storage stability of the CF/MXene supercapacitor after being heated at 60℃for 12 hours.The density of the structural supercapacitor composite is 0.19 g/cm^(3),the specific capacitance can reach 3.38 mF/g(0.05 A/g),and the energy density and power density are 15.5 mWh/kg and 256.4 mW/kg,respectively.Its bending strength and bending modulus can reach 199.6 MPa and 4.54 GPa respectively,and the capacitance retention rate of the structural supercapacitor after bending failure is still as high as 91%.On the whole,the prepared structural supercapacitor has the characteristics of light weight,high strength,excellent and stable energy storage performance.
作者
成丽媛
赵鑫
屈芸
秦佳音
孙洁
Cheng Liyuan;Zhao Xin;Qu Yun;Qin Jiayin;Sun Jie(Jiangnan University,Wuxi 214000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2022年第11期8-16,73,共10页
Engineering Plastics Application
基金
国家自然科学基金项目(51903109)。
关键词
碳纤维
MXene
结构超级电容器
嵌入法
结构储能材料
电化学
carbon fiber
MXene
structural supercapacitors
embedded method
structural energy storage materials
electrochemistry
