三维一体针织结构超级电容器的储能性能  

Energy storage performance of three-dimensional integrated knitted supercapacitor

作　　者：陈露 石宝[1,2] 魏赛男[1,2] 贾立霞[1,2] 阎若思[1,2] CHEN Lu;SHI Bao;WEI Sainan;JIA Lixia;YAN Ruosi(College of Textile and Garments,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Technology Innovation Center for Textile and Garment,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China)

机构地区：[1]河北科技大学纺织服装学院,河北石家庄050018 [2]河北科技大学河北省纺织服装工程技术创新中心,河北石家庄050018

出　　处：《纺织学报》2024年第2期126-133,共8页Journal of Textile Research

基　　金：国家自然科学基金青年科学基金项目(12202133);河北科技大学基本科研项目国家基金一般专项项目(2023XLM004);河北省高等学校科学研究计划重点项目(ZD2022025);河北省青年拔尖人才支持计划项目(〔2018〕-27);石家庄市科技计划项目(221190171A)。

摘　　要：为提高能源储存器件的柔韧性及安全性,开发柔性可穿戴三维一体储能设备。制备二维过渡金属碳化物Ti_(3)C_(2)T_(x)(MXene)/锌(Zn)三维一体针织结构超级电容器(ZSC)。通过透射电子显微镜和X射线衍射仪对MXene纳米片微观形貌和涂层情况进行表征,利用电化学工作站探究其储能性能。结果表明,ZSC具有优异的倍率性能,在电流密度为1 mA/cm^(2)时,ZSC面积电容为345.56 mF/cm^(2)。分析超级电容器的储能机制为负极侧的可逆Zn沉积/剥离和正极离子吸附/解吸。经过10000次充放电循环,ZSC仍具有93.51%的电容保持率和92.43%的库伦效率,且能量密度为25.05μW·h/cm^(2)时,功率密度为10 mW/cm^(2)。ZSC在空气中放置30 d,其储能性能保持稳定,表现出良好的电化学耐久性与稳定性。Objective In recent years,the development of compatible energy sources by combining wearable technology and textiles to make supercapacitors by replacing traditional forms of batteries with energy storage fabrics has gained wide attentions.The three-dimensional integrated fabrics possess inherent porous structures for effective attachment of active materials.The two-dimensional transition metal carbide Ti_(3)C_(2)T_(x)(MXene)/zinc(Zn)three-dimensional integrated knitted structure of the flexible supercapacitor(ZSC)was designed and prepared,combining flexibility of the three-dimensional fabrics with high electrical conductivity of the MXene so as to effectively improve its energy storage performance.Method Monolayer Ti_(3)C_(2)T_(x)(MXene)nanosheets were prepared by selective extraction of element"A"in MAX-Ti_(3)AlC_(2) phase using LiF and HCl.By the constant potential electrodeposition method,Zn monomers were electrodeposited on the surface of silver-plated nylon(SPN)fibers as the anode,and SPN yarns coated with MXene was used as the cathode.The functional fibers were weft knitted using STOLL computerized flat knitting machine.Cyclic voltammetry,constant current charge/discharge and electrochemical impedance methods were used to test the storage performance and durability of three-dimensional integrated knitted supercapacitors at the electrochemical workstation.Results The morphological characteristics of prepared MXene nanosheets and the energy storage performance of Ti_(3)C_(2)T_(x)(MXene)/Zn three-dimensional integrated knitted flexible supercapacitors were comprehensively investigated.The results showed that the prepared MXene nanosheets were in forms of monolayer structure and hexagonal lattice,which had a 2-D layered structure with a thickness of 1.95 nm and a size of 1.4μm.The lamellar structure with the main components of C,O and Ti was coated with MXene coated with silver-plated nylon fibers(SPN)as the cathode,and zinc monomers were electrodeposited on the SPN fibers as the anode.It was tested by cyclic

关 键 词：针织 超级电容器 二维过渡金属碳化物 智能可穿戴 

分 类 号：TS181.8[轻工技术与工程—纺织材料与纺织品设计]