Biomechanical Energy Harvesters Based on Ionic Conductive Organohydrogels via the Hofmeister Effect and Electrostatic Interaction

Autor:	Zeyang Zheng, Shien-Ping Feng, Zhiwen Zhou, Yang Luo, Yinghong Wu, Yijie Mu, Xinghan Zhang, Kelong Ao, Xinya Wu, Jingkui Qu
Rok vydání:	2021
Předmět:	Solvent Materials science Chemical engineering Self-healing hydrogels General Engineering Nanogenerator General Physics and Astronomy Ionic bonding General Materials Science Conductivity Electrical conductor Effective nuclear charge Triboelectric effect
Zdroj:	ACS Nano. 15:13427-13435
ISSN:	1936-086X 1936-0851
DOI:	10.1021/acsnano.1c03830
Popis:	The recent use of cryoprotectant replacement method for solving the easy drying problem of hydrogels has attracted increasing research interest. However, the conductivity decrease of organohydrogels due to the induced insulating solvent limited their electronic applications. Herein, we introduce the Hofmeister effect and electrostatic interaction to generate hydrogen and sodium bonds in the hydrogel. Combined with its double network, an effective charge channel that will not be affected by the solvent replacement, is therefore built. The developed organohydrogel-based single-electrode triboelectric nanogenerator (OHS-TENG) shows low conductivity decrease (one order) and high output (1.02-1.81 W/m2), which is much better than reported OHS-TENGs (2-3 orders, 41.2-710 mW/m2). Moreover, replacing water with glycerol in the hydrogel enables the device to exhibit excellent long-term stability (four months) and temperature tolerance (-50-100 °C). The presented strategy and mechanism can be extended to common organohydrogel systems aiming at high performance in electronic applications.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc3a295d7aec189f678100f7f2133646 https://doi.org/10.1021/acsnano.1c03830 Zobrazit plný text záznamu