题目：

3D dendritic hierarchically gradient nanoflowers in situ grown on conductive substrates for efficient hydrovoltaic power generation

作者：

Yanan Wang^1,2, Xianrong Yuan^1,2, Kun Ni^2,3, Yuhang Song^1,2, Xiang Li^1,2, Xuelian Zeng^1,2, Beibei Shao^{1,2 *}and Baoquan Sun^{1,2,4 *}

单位：

¹Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123,P. R. China.

²Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, P. R. China

³Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, College of Energy, Soochow University, Suzhou 215006,P. R. China

⁴Macau Institute of Materials Science and Engineering MUST-SUDA Joint Research Centre for Advanced Functional Materials Macau University of Science and Technology,Macau 999078, P. R. China

摘要：

Hydrovoltaic power generators (HPGs) that continuously produce electricity through the interactions between water molecules and surface-charged pores/channels constitute a promising sustainable power generation strategy. However, current hydrovoltaic materials are hindered by inadequate power generation due to the selectivity–permeability trade-offs and the unclear structure–activity relationships between the pore/channel structure and the resulting electrical performance. In this study, an efficient water-droplet-induced HPG was developed using three-dimensional dendritic hierarchically graded nanoflowers grownin situon the bottom electrode. The nanoflowers formed by the self-assembly of nanocells composed of nanorods featured an increased surface area and hierarchical macro/meso/microporosities that achieved synergistic high ionic selectivity and permeability. Thein situpreparation of nanoflowers also facilitated their robust contact with the bottom electrode. Consequently, a single water droplet (20 μL) produced an open-circuit voltage of 600 mV and a high short-circuit current density of 45 μA cm⁻², approximately twice that of other hydrovoltaic materials. By leveraging the tunable porous structure with a precisely controlled average pore size spanning a broad range (20 nm–3.77 μm), the intricate correlation between the pore structure and the device performance was elucidated. Multifunctional self-powered sensing platforms, including an intelligent ultraviolet light alarm, a wearable breath-monitoring mask, and a non-contact human–machine interface were demonstrated. The proposed hierarchical-gradient nanoflower structure provides a new paradigm for constructing high-performance hydrovoltaic materials.

影响因子：

32.5

分区情况：

一区

链接：

https://pubs.rsc.org/en/content/articlelanding/2024/ee/d4ee00828f