All-solution-processed wearable moist-electric generators based on engineered nanocomposites of carbon nanotube and gelatin incorporated with PEDOT: PSS interfacial blocking layer. (15th December 2022)

• Record Type: Journal Article
• Authors: Kang, Byeong-Cheol; Park, Sang-Joon; Choi, Hyeong-Jun; Ha, Tae-Jun
• Is Part Of: Nano energy. Volume 104(2022)Part B
• Publication Date: 2022-12-15
• Subjects: Wearable moist-electric generator -- Oxygen-containing functional group -- Engineered nanocomposite -- Interfacial layer -- All-solution-process; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2022.107890
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Moist-electric generators (MEGs), capable of harvesting energy directly from ambient moisture, have been considered as promising and eco-friendly candidates for supplying continuous and stable electricity for self-powered electronics. Using a simple and practical all-solution process in ambient air, we developed wearable MEGs comprising engineered nanocomposites of multi-walled carbon nanotube and gelatin. A high open-circuit voltage of 0.95 V and short-circuit current (ISC ) of 51.7 μA was achieved at a relative humidity of 90%. The operating mechanism of the proposed MEG was investigated by analyzing the protons generated by the dissociation of oxygen-containing functional groups during hydration. High sustainability and reliability of the electrical output performance for 100 h were demonstrated via charge screening induced by the interfacial blocking layer of poly(3, 4-ethylenedioxythiophene):polystyrene sulfonate. Moreover, excellent mechanical stability of the wearable MEG was verified by analyzing the electrical output performance under a bending state and after 10, 000 bending cycles with a strain of 60%. A practical self-powered application with wearability was demonstrated using MEGs in series at the cell level, which enabled the operation of light-emitting diodes by directly attaching to a commercial mask with a form-free surface. Graphical Abstract: ga1 Highlights: All-solution-processed wearable MEGs with engineered nanocomposites incorporated with interfacial layer were demonstrated. The mechanism was investigated by analyzing protons generated by dissociation of oxygen-containing functional groups. High sustainability and stability were verified under bending state for 100 h and after 10000 bending cycles with 60% strain. A practical self-powered application with wearability was demonstrated using MEGs in series at the cell level.