Sustained power generation from concentration gradients in a solid matrix

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL Journal of Materials Chemistry A Pub Date : 2025-03-14 DOI:10.1039/d4ta08822k
Jiajun Chen, Ting Zeng, Yang Liu
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Abstract

Concentration gradients possess significant energy. However, the inherent fluidity of liquids typically results in rapid energy dissipation, while using membranes to separate solutions with different concentrations introduces fundamental challenges, including excessive material consumption and packaging difficulties. Coupling concentration gradients with solid substrates could effectively address these issues. In this paper, we demonstrate the feasibility of sustaining energy supply through concentration gradients in a solid matrix, while investigating the working principle and output characteristics of the Solid Concentration Gradient Power Generator (SCGPG). Subsequently, the sustained energy supply capability of SCGPGs was demonstrated by powering a series of small electronic devices. To compensate for the finite energy supply caused by spontaneous dissipation of concentration gradients, we proposed two approaches. The first involved a waste heat utilization strategy that maintained concentration gradients through temperature differences, thereby extending the SCGPG's operational duration. The second approach focused on materials and manufacturing methods, where combining water and soil to form water–soil-SCGPGs significantly lowered production costs and expanded the adaptability of SCGPGs. This study breaks the constraints of liquid mobility and membrane dependence in concentration gradient-based power systems, providing a promising approach for economically efficient and sustained concentration gradient energy harvesting.

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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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