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

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.