Ti₃C₂T_x MXene-Reduced Graphene Oxide Composite Electrodes for Stretchable Supercapacitors

Abstract

The development of stretchable electronics requires the invention of compatible high-performance power sources, such as stretchable supercapacitors and batteries. In this work, two-dimensional (2D) titanium carbide (Ti 3 C 2 T x ) MXene is being explored for flexible and printed energy storage devices by fabrication of a robust, stretchable high-performance supercapacitor with reduced graphene oxide (RGO) to create a composite electrode. The Ti 3 C 2 T x /RGO composite electrode combines the superior electrochemical and mechanical properties of Ti 3 C 2 T x and the mechanical robustness of RGO resulting from strong nanosheet interactions, larger nanoflake size, and mechanical flexibility. It is found that the Ti 3 C 2 T x /RGO composite electrodes with 50 wt % RGO incorporated prove to mitigate cracks generated under large strains. The composite electrodes exhibit a large capacitance of 49 mF/cm 2 (∼490 F/cm 3 and ∼140 F/g) and good electrochemical and mechanical stability when subjected to cyclic uniaxial (300%) or biaxial (200% × 200%) strains. The as-assembled symmetric supercapacitor demonstrates a specific capacitance of 18.6 mF/cm 2 (∼90 F/cm 3 and ∼29 F/g) and a stretchability of up to 300%. The developed approach offers an alternative strategy to fabricate stretchable MXene-based energy storage devices and can be extended to other members of the large MXene family.

High performance fully paper‐based all‐solid‐state supercapacitor fabricated by a papermaking process with silver nanoparticles and reduced graphene oxide‐modified pulp fibers

“…Figure 5C shows the GCD curves of the supercapacitor at various current densities. The linear profile of GCD curves and their symmetric triangular shape further demonstrate the nearly ideal capacitive behavior of the supercapacitor 63,64 . Nyquist plot in Figure 5D shows a low Rs and Rct in the high frequency region, indicating a low internal resistance of the all‐solid‐state supercapacitor based on Ag‐Cell/RGO‐Cell paper.…”

Aggregation‐Resistant 3D Ti3C2Tx MXene with Enhanced Kinetics for Potassium Ion Hybrid Capacitors

“…Meanwhile, the low temperatures reaction would not result in chemical changes. Thus, the nondestructive surface characteristic such as functional groups and the obtained aggregation‐resistant provides more opportunities for the application of 2D materials, such as stretchable devices [ 30 ] and serving as a skeleton for nanomaterials. We believe that the template‐free spray‐lyophilization method can be further developed and applied to more 2D materials.…”

Advances on Emerging Materials for Flexible Supercapacitors: Current Trends and Beyond

“…In comparison, the titanium carbide MXene with the rGO prepared by the same vacuum filtration method although resulted in showed cracks in the electrode fabrication due to the large size of graphene flakes. [79] A promising report [80] on the pure CNT used as a transparent film electrode prepared by floating catalyst method cast on the glass substrate was compared with the gold electrode, explains the possibility of fabricating CNT based films for energy device fabrications owing to the optical conductivity exhibited by the CNT after being converted into substrate supported films. separately with the CNT.…”

“…In comparison, the titanium carbide MXene with the rGO prepared by the same vacuum filtration method although resulted in showed cracks in the electrode fabrication due to the large size of graphene flakes. [ 79 ]…”