An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes
Type
ArticleAuthors
Wu, JiabinLi, Qun
Shuck, Christopher E.
Maleski, Kathleen
Alshareef, Husam N.

Zhou, Jun
Gogotsi, Yury
Huang, Liang
KAUST Department
Functional Nanomaterials and Devices Research GroupMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
OSR-CRG2016-2963Date
2021-05-26Online Publication Date
2021-05-26Print Publication Date
2022-01Embargo End Date
2022-05-26Submitted Date
2021-03-21Permanent link to this record
http://hdl.handle.net/10754/669420
Metadata
Show full item recordAbstract
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.[Figure not available: see fulltext.]Citation
Wu, J., Li, Q., Shuck, C. E., Maleski, K., Alshareef, H. N., Zhou, J., … Huang, L. (2021). An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes. Nano Research. doi:10.1007/s12274-021-3513-xSponsors
This work was financially supported by the National Natural Science Foundation of China (Nos. 51972124, 51902115, and 51872101). Research reported in this publication was also supported by King Abdullah University of Science and Technology (KAUST) under the KAUST-Drexel Competitive Research Grant (No. OSR-CRG2016-2963 sub 11206). The authors express their gratitude to late Prof. J. Zhou for valuable discussions. The authors thank to the facility support of the Center for Nanoscale Characterization & Devices, WNLO-HUST and the Analysis and Testing Center, HUST.Publisher
Springer Science and Business Media LLCJournal
Nano ResearchAdditional Links
https://link.springer.com/10.1007/s12274-021-3513-xae974a485f413a2113503eed53cd6c53
10.1007/s12274-021-3513-x