Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor
Journal Article
·
· Advanced Electronic Materials
- Drexel Univ., Philadelphia, PA (United States)
- Drexel Univ., Philadelphia, PA (United States); King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Kingdom of Saudi Arabia)
- Drexel Univ., Philadelphia, PA (United States); CIC energiGUNE, Alava (Spain)
- King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Kingdom of Saudi Arabia)
Current microfabrication of micro–supercapacitors often involves multistep processing and delicate lithography protocols. In this study, simple fabrication of an asymmetric MXene–based micro–supercapacitor that is flexible, binder–free, and current–collector–free is reported. Here, the interdigitated device architecture is fabricated using a custom–made mask and a scalable spray coating technique onto a flexible, transparent substrate. The electrode materials are comprised of titanium carbide MXene (Ti3C2Tx) and reduced graphene oxide (rGO), which are both 2D layered materials that contribute to the fast ion diffusion in the interdigitated electrode architecture. This MXene–based asymmetric micro–supercapacitor operates at a 1 V voltage window, while retaining 97% of the initial capacitance after ten thousand cycles, and exhibits an energy density of 8.6 mW h cm–3 at a power density of 0.2 W cm–3. Further, these micro–supercapacitors show a high level of flexibility during mechanical bending. Utilizing the ability of Ti3C2Tx–MXene electrodes to operate at negative potentials in aqueous electrolytes, it is shown that using Ti3C2Tx as a negative electrode and rGO as a positive one in asymmetric architectures is a promising strategy for increasing both energy and power densities of micro–supercapacitors.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1483176
- Alternate ID(s):
- OSTI ID: 1410379
- Journal Information:
- Advanced Electronic Materials, Journal Name: Advanced Electronic Materials Journal Issue: 1 Vol. 4; ISSN 2199-160X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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