@article{Ren2023, 
author = {Cai-Yun Ren and Sheng-You Qiu and Jing-Ru Zhai and Ke-Qi Zhang and Jia-Xing Lu and Jian Gao and Chuang Wang and Yong-Chao Zhang and Xiao-Dong Zhu},
title = {Ionic liquid-wrapped MXene film with bowl-like structures for highly integrated micro-supercapacitor array with ultrahigh output voltage},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {4},
pages = {4926-4932},
keywords = {microemulsion system, ionic liquid-wrapped MXene films, micro-supercapacitors, extra-high voltage, integration},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5098-4},
doi = {10.1007/s12274-022-5098-4},
abstract = {Recent researches in the development of in-plane micro-supercapacitor (MSC) have been dedicated to advancing its energy density in a finite storage area. However, the low ion-accessible surface area of plane electrode material has been the bottleneck limiting the energy output of MSC. Herein, we design a stable ionic liquid (IL)-MXene microemulsion system in virtue of tween-20 (TW20), gathering IL-TW20 microdroplets around MXene nanosheets. The microemulsion can adhere on the current collector and form the dense MXene-TW20-IL film. The IL as spacer and electrolyte is retained in the interlamination of MXene with the elimination of the TW20 during heat treatment, which enlarges the ion-accessible surface area of the MXene electrode. Thus, the MSC based on the flexible MXene-IL film exhibits a high areal capacitance (44.6 mF·cm−2), a high areal and volumetric energy density (50.7 μW·h·cm−2 and 39 mW·h·cm−3), surpassing most of the reported MXene-based MSCs. And the MSC unit can be arbitrarily integrated in terms of various energy and voltage requirements. For instance, the integrated array with thirty MSC units in series realizes a high voltage output of 90 V, widening the range of application in next-generation microelectronic devices.}
}