Synergistic Enhancement of Hydrovoltaic Power Generation via Functionalized Covalent Organic Frameworks with Surface Charge Engineering and Evaporation Dynamics

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-04-11 DOI:10.1016/j.nanoen.2025.110992

Xiaolong Hu, Zhiyuan Zhou, Lingfang Kong, Dongxin Guo, Pu Zhou, Jiayu Li, Boxun Liu, Yahui Li, Hongqiang Gao, Wenjuan Wei, Zhiqun Tian, Guanlin Liu, Lingyu Wan

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Abstract

The water evaporation-induced electricity generation through nanomaterial microchannels represents a promising hydrovoltaic technology. However, its practical application remains limited by low power density. In this study, we introduced neutral group pyridinic N and negatively charged -SO₃H group into covalent organic frameworks (COFs) through chemical modification to fabricate hydrovoltaic devices. Experimental results indicate that these functional group modifications enhance water desorption dynamics and increase the surface charge density within the COF channels, thereby synergistically improving the hydrovoltaic effect. The optimized COFs device (1.5 cm × 3 cm) achieves an open-circuit voltage of 1.4 V, a short-circuit current of 14.9 μA, and an output power density of 4.4 μW·cm^-2, maintaining stable operation for over 48 hours. COF-based hydrovoltaic devices exhibit high output power, excellent stability, and good scalability, offering a promising technological pathway for the development of high-performance hydrovoltaic materials.

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.