Intrinsic voltage plateau of a Nb2CTx MXene cathode in an aqueous electrolyte induced by high-voltage scanning

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)2993-3005
Journal / PublicationJoule
Volume5
Issue number11
Online published11 Oct 2021
Publication statusPublished - 17 Nov 2021

Abstract

Although MXene has been widely used in many energy storage systems, the absence of a high intrinsic voltage plateau results in its poor discharging feature. Herein, we report a Nb2CTx MXene cathode with an apparent discharge voltage plateau for high-performance aqueous zinc ion batteries. Triggered by a repeated high-voltage scanning up to 2.4 V, the Nb2CTx cathode gradually displays a stable Zn2+ storage dominated by a battery behavior. A high discharge voltage plateau of 1.55 V is presented, which is distinct from all reported MXene electrodes. Consequently, a record-level energy density among all aqueous MXenes electrodes of 146.7 Wh kg−1 with a 63% contribution from the plateau region is obtained, which is 292% that of the capacitive Nb2CTx electrode. The developed high-voltage scanning strategy is also effective for Ti3C2Tx MXene to achieve a remarkable voltage plateau.

Research Area(s)

  • aqueous Zn battery, high energy density, MXene, voltage plateau

Citation Format(s)

Intrinsic voltage plateau of a Nb2CTx MXene cathode in an aqueous electrolyte induced by high-voltage scanning. / Li, Xinliang; Ma, Xinyao; Hou, Yue; Zhang, Zhenhua; Lu, Yue; Huang, Zhaodong; Liang, Guojin; Li, Mian; Yang, Qi; Ma, Jiale; Li, Na; Dong, Binbin; Huang, Qing; Chen, Furong; Fan, Jun; Zhi, Chunyi.

In: Joule, Vol. 5, No. 11, 17.11.2021, p. 2993-3005.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review