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Binder-free 2D titanium carbide (MXene)/carbon nanotube composites for high-performance lithium-ion capacitors

Abstract

Two-dimensional (2D) MXene has a very good application prospect in the field of electrochemical energy storage due to their metallic conductivity, high volumetric capacity, mechanism and thermal stability. Herein, we report the preparation of titanium carbide (Ti3C2Tx)/carbon nanotubes (CNTs) flexible self-supporting composite film by vacuum filtration. The CNTs can effectively prevent Ti3C2Tx from stacking and improve the electrochemical performance. The as-fabricated Ti3C2Tx/CNTs film shows a high reversible capacity of 489 mAh g-1 at a current density of 50 mA g-1 together with good cycling performance. The full-cell lithium-ion capacitor (LIC) is assembled using the Ti3C2Tx/CNTs film as anode and activated carbon as cathode. The LIC exhibits a high energy density of 67 Wh kg-1 (based on the total weight of the anode and cathode), and a good capacity retention of 81.3% after 5000 cycles. These results suggest that Ti3C2Tx-CNTs film is promising as anode materials for lithium ion capacitors.

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Publication details

The article was received on 15 Jan 2018, accepted on 13 Feb 2018 and first published on 15 Feb 2018


Article type: Paper
DOI: 10.1039/C8NR00380G
Citation: Nanoscale, 2018, Accepted Manuscript
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    Binder-free 2D titanium carbide (MXene)/carbon nanotube composites for high-performance lithium-ion capacitors

    P. Yu, G. Cao, S. Yi, X. Zhang, C. Li, X. Sun, K. Wang and Y. Ma, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00380G

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