Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation
Type
ArticleAuthors
Li, HaishengXu, Kui

Chen, Pohua
Yuan, Youyou
Qiu, Yi
Wang, Ligang
Zhu, Liu
Wang, Xiaoge
Cai, Guohong
Zheng, Liming
Dai, Chun
Zhou, Deng
Zhang, Nian
Zhu, Jixin
Xie, Jinglin
Liao, Fuhui
Peng, Hailin
Peng, Yong
Ju, Jing
Lin, Zifeng

Sun, Junliang
KAUST Department
Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955–6900, Saudi ArabiaPhysical Characterization
Date
2022-04-27Permanent link to this record
http://hdl.handle.net/10754/676706
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Show full item recordAbstract
The 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.Citation
Li, 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/nwac079Sponsors
The 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.)
Publisher
Oxford University Press (OUP)Journal
National Science Reviewae974a485f413a2113503eed53cd6c53
10.1093/nsr/nwac079
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