Details

Autor(en) / Beteiligte

• Sun, Hongling
• Zhao, Yi
• Wang, Chunfeng
• Zhou, Kangkang
• Yan, Chao
• Zheng, Guoqiang
• Huang, Jiajia
• Dai, Kun
• Liu, Chuntai
• Shen, Changyu

Titel

Ultra-Stretchable, durable and conductive hydrogel with hybrid double network as high performance strain sensor and stretchable triboelectric nanogenerator

Ist Teil von

• Nano energy, 2020-10, Vol.76, p.105035, Article 105035

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Hydrogels 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 hydrogels 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 hydrogels 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 (ISC) of 26.9 μA, open circuit voltage (VOC) of 383.8 V and short-circuit transferred charge (QSC) 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. Ultra-Stretchable, durable and conductive hydrogel with hybrid double network structure has been fabricated as wearable strain sensor, exhibiting high sensitivity, wide stretchability (2850% strain) and reliable long-term stability of 1200 cycles. The hydrogel device can also act as a highly stretchable (300% strain) triboelectric nanogenerator for efficient energy harvesting. The integrated abilities of strains sensing and energy harvesting promise the tough and conductive hydrogels for high performance self-powered wearable devices and stretchable power sources. [Display omitted] •The hydrogel sensor possesses high sensitivity and ultra-wide sensing range of 0-2850% strain.•The sensor also has short response time of 200 ms and good stability (1200 cycles).•The hydrogel device can act as a highly stretchable TENG (300% strain) for energy harvesting.