Wang Weixin, Ma Mingzhu, Song Yuting, Wang Zhixin, Bian Changlei, Cai Rui, Wang Xin, Zhu Xuebin
Anhui Province Key Laboratory of Intelligent Computing and Applications, School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, P. R. China.
Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Huaibei 235000, P. R. China.
Inorg Chem. 2024 Oct 28;63(43):20633-20642. doi: 10.1021/acs.inorgchem.4c03280. Epub 2024 Oct 12.
Tuning the interlayer spacing of 2D MXenes bulk mainly focuses on hydrothermal intercalation, physiotherapy intercalation, and ion exchange intercalation. Nevertheless, the feasibility of electrochemical intercalation technology for expanding the interlayer spacing of TiC MXene bulk is not yet clear, and further research is required to advance it. Here, we employed an electrochemical intercalation technology to successfully embed metal cations (K and Na) into the interlayer structure of TiC MXene bulk, expanding the interlayer spacing from ∼10.50 to ∼13.10 Å by K intercalation, which can broaden electron/ion transport channels and enhance supercapacitor performance. Compared to the pristine TiC MXene bulk, the specific capacitance value increased by a factor of 2.8. Moreover, the intercalated MXene also exhibits excellent rate capability, with an increase from 47.32 to 70.20%. This work opens up a new path for the modification of TiC MXene bulk.
调节二维MXene块体的层间距主要集中在水热插层、物理插层和离子交换插层上。然而，电化学插层技术用于扩大TiC MXene块体层间距的可行性尚不清楚，需要进一步研究来推进。在此，我们采用电化学插层技术成功地将金属阳离子（K和Na）嵌入到TiC MXene块体的层间结构中，通过K插层使层间距从约10.50 Å扩大到约13.10 Å，这可以拓宽电子/离子传输通道并提高超级电容器性能。与原始的TiC MXene块体相比，比电容值增加了2.8倍。此外，插层后的MXene还表现出优异的倍率性能，从47.32%提高到70.20%。这项工作为TiC MXene块体的改性开辟了一条新途径。
