Abstract: Two-dimensional MXenes are promising electrode materials for high-performance supercapacitors due to their high conductivity, tunable surface terminations, and rich redox activity. Here, we report binder-free Ti3C2Tx/Mo1.33CTx composite films fabricated from hydrothermally etched MXene nanosheets and evaluate their electrochemical performance in H2SO4 and LiCl aqueous electrolytes. Introducing a small fraction of vacancyordered Mo1.33CTx (20 wt%) significantly enhances the pseudocapacitive response of Ti3C2Tx, increasing the specific capacitance from 340 to 487 F⋅g-1 in H2SO4 and from 173 to 227 F⋅g-1 in LiCl at low scan rates. The improvement is attributed to the synergistic effects of ordered Mo vacancies, oxygen-rich surface terminations, and favorable interfacial electronic interactions, which together facilitate ion intercalation and accelerate charge-transfer kinetics. The optimized composite also demonstrates excellent cycling stability, retaining >95 % of its initial capacitance after 10,000 charge–discharge cycles. Furthermore, a symmetric supercapacitor assembled with Ti3C2Tx/Mo1.33CTx electrodes delivers an energy density of 23 Wh⋅kg-1 at 970 W⋅kg-1 in LiCl electrolyte. These results highlight an efficient strategy for enhancing MXene-based electrodes by combining vacancy engineering with heterostructure design, offering a promising route toward durable, high-energy aqueous supercapacitors.

Cite: Tsyganov A. , Vikulova M. , Zotov I. , Plugin I. , Grapenko O. , Korotaev E. , Kovineva N. , Sysoev V. , Gorokhovsky A. , Gorshkov N.
Ti3C2Tx/Mo1.33CTx MXene composite films as binder-free electrode to boost the supercapacitor performance in H2SO4 and LiCl electrolytes
Journal of energy storage. 2026. V.147. 120141 :1-14. DOI: 10.1016/j.est.2025.120141 WOS Scopus

Dates:

Published print:

Feb 20, 2026

Identifiers:

Web of science:	WOS:001659596200001
Scopus:	2-s2.0-105026857349

Citing: Пока нет цитирований

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