Preparation and properties of PAN/MXene coaxial fiber electrode

doi:10.16085/j.issn.1000-6613.2023-1291

Abstract

Abstract:

A series of coaxial fiber electrode samples with different sheath and core component were prepared through wet-spinning method combined with subsequent high temperature carbonization. Single-layer MXene sheets, polymethyl methacrylate (PMMA) and polyacrylonitrile (PAN) were applied in this study for making various spinning solution. The influence of different material constitution of the sheath and core layer on the property of as-prepared fiber electrodes, including microstructure, mechanical strength, electrical conductivity and electrochemical performance, was discussed and analyzed. The results showed that the fiber electrode sample with PAN/MXene sheath layer and PAN/PMMA core layer could achieve balance between the electrochemical performance and mechanical strength. The tensile breaking strength, specific conductance and specific capacitance reached 14.4MPa, 322.7S/m and 113.18F/g, respectively. In addition, the fiber electrode also had good cycle stability with capacitance retention rate at 95.7% after 1000 GCD cycles.

Key words: fiber electrode, MXene, coaxial fiber, wet-spinning, electrochemical energy storage

摘要：

采用单片层MXene、聚甲基丙烯酸甲酯（PMMA）和聚丙烯腈（PAN）粉末为原料制备不同纺丝液，经过同轴湿法纺丝成型、高温炭化制备出一系列不同壳芯组分同轴纤维电极；分析不同壳层、芯层材料对纤维电极微观结构以及力学、电学、电化学等性能的影响规律。结果表明，当以PAN/MXene为壳层、PAN/PMMA为芯层时，可以实现电极材料力学性能与电化学性能的平衡，拉伸强度、电导率和比电容分别为可达到14.4MPa、322.7S/m和113.18F/g，经过1000次恒电流充放电测试（GCD）循环后，比电容保持率可达到95.7%。

关键词: 纤维电极, MXene, 同轴纤维, 湿法纺丝, 电化学储能

CLC Number:

TB34

QU Yun, CHENG Liyuan, DAI Guoliang, WANG Gang, GUO Yuqing, SUN Jie. Preparation and properties of PAN/MXene coaxial fiber electrode[J]. Chemical Industry and Engineering Progress, 2024, 43(9): 5113-5122.

屈芸, 成丽媛, 代国亮, 王刚, 郭羽晴, 孙洁. PAN/MXene同轴纤维电极的制备及性能[J]. 化工进展, 2024, 43(9): 5113-5122.

Figures/Tables 13

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样品种类	样品名称	样品编号	壳层纺丝液	芯层纺丝液
同轴纤维	PAN/PMMA@PAN/MXene	A	PAN/PMMA	PAN/MXene
同轴纤维	PAN/MXene@PAN/PMMA	B	PAN/MXene	PAN/PMMA
中空纤维	PAN/PMMA	C	PAN/PMMA	PVA/H₂O
中空纤维	PAN/MXene	D	PAN/MXene	PVA/H₂O

样品种类	样品名称	样品编号	壳层纺丝液	芯层纺丝液
同轴纤维	PAN/PMMA@PAN/MXene	A	PAN/PMMA	PAN/MXene
同轴纤维	PAN/MXene@PAN/PMMA	B	PAN/MXene	PAN/PMMA
中空纤维	PAN/PMMA	C	PAN/PMMA	PVA/H₂O
中空纤维	PAN/MXene	D	PAN/MXene	PVA/H₂O

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