期刊
NANO ENERGY
卷 76, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105035
关键词
Conductive hydrogel; Stretchable triboelectric nanogenerator; Strain sensor; Transparency; Human motion detection
类别
资金
- National Natural Science Foundation of China [51773183, U1804133]
- National Natural Science Foundation of China-Henan Province Joint Funds [U1604253]
- Henan Province University Innovation Talents Support Program [20HASTIT001]
- Innovation Team of Colleges and Universities in Henan Province [20IRTSTHN002]
Hydmgels with integrated attributes of stretchability, conductivity, transparency and robustness have been emerging because of their promising applications in wearable devices, human health monitoring, advanced intelligent systems and energy harvesting. In this paper, we developed stretchable and conductive hydmgels via hybrid double networks approach by combination of rigid physically cross-linked gelatin, tough chemically cross-linked polyacrylamide (PAM) and poly(3,4-ethylene dioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) as conducting component. The double networks can be further interlocked by using physical entanglements and abundant dynamic hydrogen bonds, contributing to the improved mechanical properties and self-recovery ability. A transparent and wearable strain sensor is fabricated by sandwiching the hydmgels with two layers of adhesive polyurethane (PU) tape, exhibiting good sensitivity (gauge factor (GF) = 1.58), ultra-wide sensing range of 0-2850% strain, short response time of 200 ms and superior durability and reproducibility (1200 cycles), which endows the sensitive monitors with effective discernibility for detecting intricate human motions. Importantly, the hydrogel-based device can act as a highly stretchable (300% strain) triboelectric nanogenerator (STENG) for efficient energy harvesting, giving a short circuit current (I-SC) of 26.9 mu A, open circuit voltage (V-OC) of 383.8 V and short-circuit transferred charge (Q(SC)) of 92 nC. The integrated abilities of strain sensing and energy harvesting promise the hydrogels for high performance self-powered wearable devices and stretchable power sources.
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