摘要
为解决MXene电极材料片层间易堆叠的问题,采用化学聚合法在MXene的表面及层间原位生长高导电性的聚吡咯(PPy)。PPy的引入显著增大了MXene的层间距,为电荷的转移提供了更多的活性位点,进而优化了电极的电化学性能。此外,PPy还提供了额外的氧化还原位点,进一步提高了电极的容量。为了制备柔性电极,采用丝网印刷工艺将MXene/PPy复合材料和活性炭(AC)油墨印刷在纸基上,成功制备出叉指型非对称微型超级电容器(AMSCs),并对电极材料的形貌、结构以及电化学性能进行了深入研究。结果显示,在0.5 mA/cm^(2)电流密度下,该AMSC的面积比电容可达40.66 F/cm^(2)。此外,其能量密度和相应的功率密度分别高达0.011 mWh/cm^(2)和0.35 mW/cm^(2)。研究提出的PPy改性MXene策略,优化了电极结构,有效提升了电极的电化学性能。
In order to address the issue of layer stacking in MXene electrode material,a chemical polymerization method was employed to facilitate the growth of highly conductive polypyrrole(PPy)on the surface and between layers of MXene.The incorporation of PPy significantly enhances the layer spacing of MXene and provides abundant active sites for charge transfer,thereby optimizing the electrochemical performance of the electrode.Moreover,PPy also introduces additional redox sites to enhance capacitance in the electrode.For flexible electrode fabrication,a composite material comprising MXene/PPy and activated carbon(AC)ink was screen printed onto a paper substrate to successfully fabricate interdigitated asymmetric micro-supercapacitors(AMSCs).The morphology,structure,and electrochemical properties of the electrode materials were comprehensively investigated.The results demonstrate that AMSC exhibits an area specific capacitance as high as 40.66 mF/cm^(2) at a current density of 0.5 mA/cm^(2).Furthermore,it achieves remarkable energy density and corresponding power density values up to 0.011 mWh/cm^(2) and 0.35 mW/cm^(2),respectively.The modified approach proposed in this study optimizes the electrode architecture while effectively enhancing its electrochemical performance.
作者
庞新语
陈健
乔轩
邱建辉
臧利敏
杨超
PANG Xinyu;CHEN Jian;QIAO Xuan;QIU Jianhui;ZANG Limin;YANG Chao(Key Laboratory of Natural and Biomedical Polymer Materials,Guilin University of Technology,Guilin 541004,China;Guangdong Foshan Lianchuang Graduate of Engineering,Foshan 528311,China;Faculty of Systems Science and Technology,Akita Prefectural University,Yurihonjo 0150055,Japan)
出处
《功能材料》
北大核心
2025年第7期7126-7134,共9页
Journal of Functional Materials
基金
广西自然科学基金项目(2022GXNSFAA035597,AB23075171)
桂林市科学研究与技术开发计划项目(20220124-21)。
关键词
MXene
聚吡咯
丝网印刷
微型超级电容器
柔性储能
MXene
polypyrrole
screen-printable method
micro-supercapacitor
flexible energy storage
