Textile energy storage: Utilizing binary nickel cobalt metal-organic frameworks and polypyrrole-derived nitrogen-enriched carbons

Date

2025-02-28

Author

Hekmat, Farzaneh
Ünalan, Hüsnü Emrah

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Developed as electrode-active materials, nickel‑cobalt bimetallic metal organic frameworks (MOFs) demonstrate impressive capacitive performance. In this study, highly porous Ni–Co MOFs were directly grown onto commercial cotton textiles (CTs) using a one-pot hydrothermal method. The MOF-decorated CTs underwent extensive electrochemical analysis, achieving a storage capacity of up to 132C g−1, comparable to conventional wearable supercapacitors. These textile electrodes exhibited remarkable cyclic stability, retaining approximately 90.6 % of their initial capacity after 5000 continuous charge-discharge cycles. Additionally, N-rich pyrolyzed polypyrrole carbons (NPPC) were utilized as negative electrodes on commercially available carbon cloths (CCs). We successfully engineered wearable asymmetric supercapacitors (WASCs) with commendable capacitances of 76C g−1, employing an alkaline polyvinyl alcohol gel electrolyte. The fabricated Ni–Co MOF@CT//NPPC@CC WASC devices demonstrated substantial energy storage capability (29.6 Wh kg−1) while maintaining exceptional power density (428 W kg−1) and long-term cycle stability, retaining 91 % of their initial capacitance after 5000 charge-discharge cycles. Given their remarkable capacitive behavior, these textile supercapacitors show great promise as high-performance wearable energy storage devices.

Subject Keywords

Asymmetric wearable supercapacitors, Binary nickel cobalt metal-organic frameworks, Nitrogen-rich porous carbons, Polypyrrole

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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85214336158&origin=inward
https://hdl.handle.net/11511/113182

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Department of Metallurgical and Materials Engineering, Article