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在Ti₃C₂T_XMXene纤维中加速离子扩散动力学的间层操纵,以提高具有高速率能力的超能力

Huifang Wang¹, Weidong Zhao¹, Yang Guo¹

¹School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China.

|April 14, 2025

概括

研究人员通过添加纤维素改进了MXene (碳化) 纤维,提高了机械强度和电化学性能. 基乙烯纤维素促进了更快的离子运输,提高了储能器件的电容和速率能力.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

聚合物整合通过界面交叉连接提高了MXene纤维的机械强度.
提高MXene纤维的电化学性能 (电容,速率能力) 以及机械强度是具有挑战性的,这是由于缓慢的离子扩散动力学.

研究的目的:

为了研究使用纤维素衍生物的碳化物 (Ti3C2Tx) 纤维的间层操纵.
检查纤维素中替代组在优化MXene纤维特性中的作用.
为了同时提高MXene纤维的机械强度和电化学性能.

主要方法:

将纤维素,特别是乙烯纤维素 (HEC) 纳入MXene dope中.
分析纤维素和Ti3C2Tx纳米薄膜之间的结.
对修改纤维的离子扩散动力学和电化学性能 (电容,速率能力) 的评估.

主要成果:

纤维素的添加提高了MXene的旋性,并通过键桥接了Ti3C2Tx纳米板.
具有最佳群体大小和吸附的基乙 (HEC) 通过减少固体效应,促进了快速的质子传输.
优化的M-HEC-1.0%纤维实现了高容量 (1531 F cm-3在2 A cm-3),增强强度 (∼76 MPa) 和优越的速率能力 (89.2%的保留在15 A cm-3).

结论:

使用纤维素,特别是HEC的间层操纵有效地解决了MXene纤维中的缓慢离子扩散.
优化的MXene-HEC复合纤维在储能应用中显示出机械强度和高电化学性能之间有前途的平衡.

关键词:

MXene混合纤维纤维的混合纤维.纤维超级电容器超级电容器层间间距离是层间距离之间的距离.离子扩散离子扩散

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