Here, an unusual MXene with a high ratio of oxygen functional groups was prepared by hydrothermal treatment of HF-etched MXene in aqueous KOH solution. The prepared MXene (H-220) exhibits ultrahigh specific capacitance (1030 F g⁻¹ in a potential window of 0.85 V), and excellent rate and cycling performance simultaneously in a sulfuric acid electrolyte, and can act as an anode material of proton batteries.

中文翻译：

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亲核水解使 HF 蚀刻的 MXene 具有千法拉比电容和优异的倍率性能

在这里，通过在 KOH 水溶液中对 HF 蚀刻的 MXene 进行水热处理，制备了一种具有高比例氧官能团的不寻常 MXene。所制备的MXene（H-220）在硫酸电解液中表现出超高比电容（0.85 V电位窗口下为1030 F g ^-1 ），同时具有优异的倍率和循环性能，可作为质子电池的负极材料。