Zhan Fei, Wang Aurelia C, Xu Liang, Lin Shiquan, Shao Jiajia, Chen Xiangyu, Wang Zhong Lin
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences Beijing 100049, China.
ACS Nano. 2020 Dec 22;14(12):17565-17573. doi: 10.1021/acsnano.0c08332. Epub 2020 Nov 24.
It has been demonstrated that substantial electric power can be produced by a liquid-based triboelectric nanogenerator (TENG). However, the mechanisms regarding the electrification between a liquid and a solid surface remain to be extensively investigated. Here, the working mechanism of a droplet-TENG was proposed based on the study of its dynamic saturation process. Moreover, the charge-transfer mechanism at the liquid-solid interface was verified as the hybrid effects of electron transfer and ion adsorption by a simple but valid method. Thus, we proposed a model for the charge distribution at the liquid-solid interface, named Wang's hybrid layer, which involves the electron transfer, the ionization reaction, and the van der Waals force. Our work not only proves that TENG is a probe for investigating charge transfer at interface of all phases, such as solid-solid and liquid-solid, but also may have great significance to water energy harvesting and may revolutionize the traditional understanding of the liquid-solid interface used in many fields such as electrochemistry, catalysis, colloidal science, and even cell biology.
已经证明，基于液体的摩擦电纳米发电机（TENG）可以产生大量电能。然而，关于液体与固体表面之间起电的机制仍有待广泛研究。在此，基于对液滴-TENG动态饱和过程的研究，提出了其工作机制。此外，通过一种简单但有效的方法，验证了液-固界面处的电荷转移机制是电子转移和离子吸附的混合效应。因此，我们提出了一种液-固界面电荷分布模型，称为王氏混合层，它涉及电子转移、电离反应和范德华力。我们的工作不仅证明了TENG是研究诸如固-固和液-固等所有相界面电荷转移的探针，而且可能对水能收集具有重大意义，并可能彻底改变电化学、催化、胶体科学甚至细胞生物学等许多领域中对液-固界面的传统认识。
