High areal capacitance of vanadium oxides intercalated TiC MXene for flexible supercapacitors with high mass loading.

Author(s) Zhang, Z.; Guo, M.; Tang, Y.; Liu, C.; Zhou, J.; Yuan, J.; Gu, J.
Journal Nanotechnology
Date Published 2020 Apr 17

Flexible all-solid-state supercapacitors (ASSSs) have caught the scientific attention to meet the explosive demand for portable and wearable electronic devices. However, it is difficult for flexible electrode materials to obtain a high areal capacitance at a high mass loading, which limits their commercial applications. In this study, vanadium oxide (VO) nanoparticles are introduced into TiC flakes with the aid of cetyltrimethylammonium bromide (CTAB). The intercalation of VO particles in the interlayer of TiC establishes a hierarchical structure and facilitates the electrolyte penetration. As a result, the prepared CT-TiC@VO composite electrode achieves a high areal capacitance of 2065 mF cm at 3 mA cm and superior active mass loading (15 mg cm). Meanwhile, over 93% capacitance is maintained after 6000 cycles at 18 mA cm. The ASSS based on CT-TiC@VO delivers a high areal capacitance of 477 mF cm at 1 mV s and exhibits stable performance at different bending states, which reaches to the advanced level for the ASSSs based on MXenes.

DOI 10.1088/1361-6528/ab6689
ISSN 1361-6528
Citation Nanotechnology. 2020;31(16):165403.

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