Ti3C2Tx/Wood Carbon as High-areal-capacity Electrodes for Supercapacitors

doi:10.15541/jim20190267

Abstract

Abstract:

MXenes—two-dimensional (2D) compounds generated from layered bulk materials, have attracted significant attention in energy storage fields. However, low mass loading of MXenes results in low areal capacity and impedes the practical use of MXenes electrodes. Inspired by natural basswood, an ideal architecture with natural, three-dimensionally (3D) aligned open microchannels was developed for high Ti₃C₂T_x mass loading. Compared with reported Ti₃C₂T_x electrode structure, the 3D porous carbon matrix has several advantages including low tortuosity, high conductivity and good structure stability. The Ti₃C₂T_x assembled with the wood carbon can deliver a high areal capacity of 1983 mF/cm ² at 2 mV/s with a high Ti₃C₂T_x mass loading of 17.9 mg/cm ² when used as electrode for supercapacitors. This work provides a new strategy to develop 3D porous electrodes for MXenes, which can achieve high areal capacity.

Key words: Ti₃C₂T_x, wood carbon, supercapacitor, high areal capacity

CLC Number:

TQ174

LI Teng-Fei, HUANG Lu-Jun, YAN Xu-Dong, LIU Qing-Lei, GU Jia-Jun. Ti₃C₂T_x/Wood Carbon as High-areal-capacity Electrodes for Supercapacitors[J]. Journal of Inorganic Materials, 2020, 35(1): 126-130.

Figures/Tables 3

Fig. 1 Characterixations of Ti3C2Tx (a) SEM image of raw material Ti3AlC2, (b) SEM image of Ti3AlC2 via NaOH etching, (c) XRD patterns of Ti3AlC2 and Ti3C2Tx, (d) TEM image of NaOH-Ti3C2Tx

Fig. 2 SEM images of bare wood carbon ((a, b)) and Ti3C2Tx/wood carbon ((c, d)) (a, c) Top-view; (b, d) Cross-sectional view

Fig. 3 CV curves of bare wood carbon (a) and Ti3C2Tx/wood carbon (b), GCD cycling profiles (c)of the Ti3C2Tx/wood carbon electrode collected at 1, 5, 10, and 20 mA/cm2, and capacitance retention test at 10 mA/cm2 (d)

References 12

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Ti₃C₂T_x/Wood Carbon as High-areal-capacity Electrodes for Supercapacitors

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