| Autor: |
Yadav P; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India., Naik PB; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India., Beere HK; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India., Reddy NS; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India., Samanta K; School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata700032, India., Sanna Kotrappanavar N; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India.; IMDEA Water Institute, Parque Científico Tecnológico de la Universidad de Alcalá, Avenida Punto Com, 2, Alcalá de Henares, 28805Madrid, Spain., Algethami JS; Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran11001, Saudi Arabia.; Department of Chemistry, Faculty of Science and Arts, Najran University, Najran11001, Saudi Arabia., Faisal M; Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran11001, Saudi Arabia.; Department of Chemistry, Faculty of Science and Arts, Najran University, Najran11001, Saudi Arabia., Harraz FA; Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran11001, Saudi Arabia.; Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Sharurah, Najran11001, Saudi Arabia., Ghosh D; Centre for Nano & Material Sciences, JAIN University, Jain Global Campus, Bangalore, Karnataka562112, India. |
| Abstrakt: |
Developing high-performance, safer, and affordable flexible batteries is of urgent need to power the fast-growing flexible electronics market. In this respect, zinc-ion chemistry employing aqueous-based electrolytes represents a promising combination considering the safety, cost efficiency, and both high energy and high-power output. Herein, we represent a high-performance flexible in-plane aqueous zinc-ion miniaturized battery constructed with all electrodeposited electrodes, i.e., MnO 2 cathode and zinc anode with polyimide-derived interdigital patterned laser-scribed carbon (LSC) as the current collector as well as the template for electrodeposition. The LSC possesses a cross-linked network of graphitic carbon sheet, which offers large surface area over low footprint and ensures active materials loading with a robust conductive network. The LSC with high zincophilic characteristic also offers dendrite-free zinc deposition with very low Zn 2+ plating stripping overpotential. Benefitting from the Zn//MnO 2 -rich redox chemistry, the ability of the 3D LSC network to uniformly distribute reaction sites, and the architectural merits of in-plane interdigitated electrode configuration, we report very high capacity values of ∼549 mAh/g (or ∼523 μAh/cm 2 ) and 148 mAh/g (or 140 μAh/cm 2 ) at 0.1 A/g (0.095 mA/cm 2 ) and 2 A/g (1.9 mA/cm 2 ) currents, respectively. The device was also able to maintain a high capacity of 196 mAh/g (areal capacity of 76.19 μAh/cm 2 ) at 1 A/g (0.95 mA/cm 2 ) current after 1350 cycles. The flexibility of the device was demonstrated in polyacryl amide (PAM) gel polymer soaked with a 2 M ZnSO 4 and 0.2 M MnSO 4 electrolyte, which exhibited a comparable specific capacity of ∼102-110 mAh/g in flat condition and different bending (100° or 160° bending) conditions. The device does not use any conventional current collector, separator, and conductive or polymer additives. The overall process is highly scalable and can be completed in less than a couple of hours. |
