Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation
KAUST DepartmentCore Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955–6900, Saudi Arabia
Permanent link to this recordhttp://hdl.handle.net/10754/676706
MetadataShow full item record
AbstractThe effects of nanoconfined water and charge storage mechanism are crucial in achieving ultrahigh electrochemical performance of two-dimensional (2D) transition metal carbides (MXenes). We propose a facile method to manipulate the nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti3C2 MXene, also with the interlayer spacing significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g–1 (2000 F cm–3) was obtained with outstanding high-rate performance. The atomic scale elucidation of layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of ‘computational and experimental microscopy’. We believe the understanding and manipulation strategy of nanoconfined water will shed light on pushing MXene and other 2D materials to better electrochemical performance.
CitationLi, H., Xu, K., Chen, P., Yuan, Y., Qiu, Y., Wang, L., Zhu, L., Wang, X., Cai, G., Zheng, L., Dai, C., Zhou, D., Zhang, N., Zhu, J., Xie, J., Liao, F., Peng, H., Peng, Y., Ju, J., … Sun, J. (2022). Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation. National Science Review. https://doi.org/10.1093/nsr/nwac079
SponsorsThe authors thank Prof. Ying Jiang, Prof. Peng Gao and Dr. Jihan Zhou at Peking University for their discussions on the nature of confined water and suggestions on confined water characterization.
Supported by the Ministry of Science and Technology of China (2020YFA0210700 to J.S.), the National Natural Science Foundation of China (22125102, 21871009 and 21527803 to J.S.; 51771085 and 51571104 to Y.P. ), and the Natural Science Foundation of Jiangsu Province (BK20200702 to K.X.)
PublisherOxford University Press (OUP)
JournalNational Science Review
Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/)