@article{Wu2022, 
author = {Jiabin Wu and Qun Li and Christopher E. Shuck and Kathleen Maleski and Husam N. Alshareef and Jun Zhou and Yury Gogotsi and Liang Huang},
title = {An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {1},
pages = {535-541},
keywords = {MXene, supercapacitors, manganese oxide, metal oxides, pseudocapacitors},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3513-x},
doi = {10.1007/s12274-021-3513-x},
abstract = {MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.}
}