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The Influence of Nano- and Micron-size of MXene Flakes on the Electrochemical Performance
Feng Ye,Bingbing Xu,Ronghu Chen,Ruoxin Li,Guangtao Chang 대한금속·재료학회 2023 ELECTRONIC MATERIALS LETTERS Vol.19 No.6
MXene, as a new type of two-dimensional material, has attracted much interest since it was discovered in 2011. However, only few articles discussed the eff ect of MXene fl ake size on its electrochemical performance. Here, a sand milling way is explored to produce nano-size MXene and the MILD method is used to prepare micron-size MXene (1 μm) as a comparison. Meanwhile, a mask-assisted interdigital micro-supercapacitors is prepared to explore the dependence of the electrochemical properties of MXene on their fl ake size. We show that nano-size MXene (200 nm) has a higher ionic conductivity as compared to normal micron-size MXene (1 μm). On the contrary, the larger fl ake size has higher electrical conductivities. As a result, the capacitance of micron-size MXene is better than nano-size MXene (200 nm) because the electrical conductivities are dominant. This research is helpful for further understanding of the infl uence of MXene fl ake size on its electrochemical performance.