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Flexible MXene/Laser-Induced Porous Graphene AsymmetricSupercapacitors: Enhanced Energy Density of Lateral and Sandwich Architectures Under Different Electrolytes
Abstract
Deployment of two-dimensional layered materials beyond graphene, i.e., MXene (Ti3C2Tx, T=-OH, F, O) are rigorously explored for generation-II electrochemical energy storage systems. We report strategic development of asymmetric supercapacitors (ASCs) comprising MXene as negative and laser-induced porous graphene (LIPG) as positive electrode (i.e., MXene//LIPG) to improve electrochemical energy storage in lateral (coplanar) and sandwich (cofacial) device configurations. Moreover, the interdigitated lateral device is scalable, flexible, currentcollector, and binder-free. Electrochemical performance is evaluated under various electrolyte compositions: aqueous (AE), organic (OE), and ionic liquid (ILE). Notably, ASCs operate up to ~1.0 V with AE, 1.62.0 V with OE, and 2.4-3.0 V with ILE exhibiting enhanced energy densities depending upon the electrolyte and 100% Coulombic efficiency while retaining 75-95 % of initial capacitance after thousands of cycles (> 10,000-200,000). Specifically, the highest specific energy density (289 mW h cm−3 at power density 0.2 W cm−3) was recorded for ILE-sandwich, seven times higher as compared with AE-sandwich (40 mW h cm−3 at power density 0.4 W cm−3) followed by intermediate value for OE-lateral (8.5 mW h cm−3 at power density 0.14 W cm−3) device. On the other hand, symmetric (MXene//MXene) device provided for sandwich (ILE: 12 W h cm−3 at power density 0.5 W cm−3; OE: 8.8 mW h cm−3 at power density 0.1 W cm−3, AE: 4.2 mW h cm−3 at power density 0.1 W cm−3) and lateral (OE: 3 mW h cm−3 at power density 0.2 W cm−3) configurations. Experimental findings are discussed within the framework of constructive novel dual functionality of asymmetric electrodes’ charging mechanism offering benchmark for high performing next-generation flexible microscale supercapacitors.
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Authors (6)
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Narajczyk Magdalena dr hab.
- University of Gdansk
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Mirosław Sawczak dr hab. inż.
- The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences
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J. B. Jasinski Dr.
- University of Louisville, KY, USA
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Shubin Yang Dr.
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/smll.202502297
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
SMALL
pages 1 - 10,
ISSN: 1613-6810 - Language:
- English
- Publication year:
- 2025
- Bibliographic description:
- Gupta S., Magdalena N., Sawczak M., Jasinski J. B., Bogdanowicz R., Yang S.: Flexible MXene/Laser-Induced Porous Graphene AsymmetricSupercapacitors: Enhanced Energy Density of Lateral and Sandwich Architectures Under Different Electrolytes// SMALL -,iss. 13 (2025), s.1-10
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/smll.202502297
- Sources of funding:
-
- IDUB
- Verified by:
- Gdańsk University of Technology
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