Journal
CHEMICAL ENGINEERING JOURNAL
Volume 450, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137491
Keywords
Textile-based triboelectric nanogenerator; Wearability; Double-electrode; Machine-knittable; Spacer fabric
Categories
Funding
- Research Grants Council of the Hong Kong Special Administrative Re- gion, China [15209020]
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This study proposes a 3D double-electrode and machine-knittable fabric TENG (3D-FTENG) with integrated triboelectric materials and electrode materials. It is soft, comfortable, and washable, and can generate electricity efficiently while monitoring human motions.
Textile-based triboelectric nanogenerators (T-TENGs) have attracted much attention nowadays because of their excellent flexibility and wearability in biomechanical energy harvesting and sensing. However, T-TENGs pre-pared by current methods of layer-by-layer stacking, stitching, or coating on the surface of fabric still have some problems such as poor comfort, complicated preparation processes, and easy peeling of coating materials. Herein, a 3D double-electrode and machine-knittable fabric TENG (3D-FTENG) with integrated positive and negative triboelectric materials and electrode materials is proposed by coated core-spun yarn and programmable spacer fabric technologies. The triboelectric materials and electrodes of 3D-FTENG are made of thermoplastic poly-urethane (TPU) coated and polydimethylsiloxane (PDMS) coated Ag-cotton core-spun yarns. With structural design, three 3D-FTENGs with the same surface structures but different intermediate structures are designed and prepared, and the influence of intermediate structures on performance of 3D-FTENG is further studied. The power density of 3D-FTENG with the crisscross structure as intermediate layer reach up to 200.93 mW/m2. The 3D-FTENG is also soft, comfortable, high air permeable and washable. The output electric performance can be maintained after washing cycles and 50,000 cyclic tests. The 3D-FTENG can not only power small electronic products but also monitor human motions, demonstrating good potentials in wearable electronics.
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