MXene负载柔性碳布及其电化学性能  

MXene coated flexible carbon cloth and its electrochemical performance

作　　者：赵梓文 黄佳[1] 唐秀之[1] ZHAO Ziwen;HUANG Jia;TANG Xiuzhi(Institute of Aeronautics and Astronautics,Central South University,Changsha 410083,China)

机构地区：[1]中南大学航空航天技术研究院,长沙410083

出　　处：《材料工程》2025年第2期167-174,共8页Journal of Materials Engineering

基　　金：聚合物成型加工工程教育部重点实验室开放课题基金项目(2022kfkt04)。

摘　　要：基于天然纤维织物制备的柔性储能器件因其来源丰富、价格低廉和结构设计成熟可靠等优点而备受关注,但是天然纤维本体存在比表面积低、储能密度低等问题。本工作采用高温碳化、N,S-共掺杂、强碱刻蚀造孔调节孔容孔径与比表面积、浸渍负载电化学活性材料MXene等多步处理法对商用棉布进行处理,通过对材料化学组成、微观形貌、微孔结构、储能行为等展开研究,探索多步处理手段对材料的影响。结果表明,经过多步处理后的材料保持了较好的柔性特征,实现了N,S元素共掺杂,同时改善了碳布材料的微观结构。碳布材料表面的平均孔径从36.44 nm减小至2.03 nm,其比表面积从1.78 m^(2)/g增加到1043.37 m^(2)/g,比表面积的增幅达到了58516%,总孔容也从0.0162 mL/g提高到了0.53 mL/g。经过复杂的处理,碳布材料取得了530.83 F/g的高比电容。但是本材料也存在倍率性能差、储能性能不稳定的问题亟需后续的工作改进。本工作为进一步改善柔性碳基材料的储能性能指明了方向并提供了技术和理论参考。Flexible energy storage devices made from natural fiber braids have garnered significant attention due to their abundant availability,low cost,and mature and reliable structural design.However,these natural fiber materials typically suffer from low specific surface area and energy storage density.To address this issue,this study employs a multi-step treatment method,such as incorporating high-temperature carbonization,heterogeneous element doping,strong alkali etching,and MXene electrochemical active material coating,to treat commercial cotton fabrics.The effects of these multi-step treatments on the materials are explored through analyses of their chemical composition,microscopic morphology,microporous structure,and energy storage behavior.The results show that after multi-step treatment,the material maintains a good flexible characteristic,realizes the co-doping of N and S elements,and improves the microstructure of the carbon cloth material.Specifically,the average pore size on the surface of the carbon cloth decreases from 36.44 nm to 2.03 nm,while its specific surface area increased dramatically from 1.78 m^(2)/g to 1043.37 m^(2)/g,representing an increase of 58516%.Additionally,the total pore volume rises from 0.0162 mL/g to 0.53 mL/g.Following complex treatment,the carbon cloth achieves high specific capacitance of 530.83 F/g.However,the material still faces challenges regarding poor rate capability and unstable energy storage performance,which require further improvement in subsequent studies.This research outlines directions and provides technical and theoretical references for enhancing the energy storage performance of flexible carbon-based materials.

关 键 词：棉布 柔性 储能 电容器 MXene 碳材料 

分 类 号：TB34[一般工业技术—材料科学与工程]