热电效应
结晶
离子键合
材料科学
余热
化学工程
储能
热电冷却
纳米技术
工艺工程
化学
功率(物理)
离子
机械工程
热力学
有机化学
工程类
物理
热交换器
作者
Pingfan Li,Ting-Yuan Hu,T. Luo,Zhuang Liu,Xin Ju,Rui Xie,Dawei Pan,Wei Wang,Liang‐Yin Chu
标识
DOI:10.1016/j.cej.2023.147380
摘要
Thermocells based on ionic Seebeck effect utilize waste low-grade heat for electrical energy storage/supply, offering promising solutions for global energy sustainability. Creation of mechanically flexible thermocells with enhanced ionic Seebeck effect in a wide temperature window is highly required for their wide application, but remains challenging. Here we report a general strategy based on selective confined microcrystallization to create hydrogel thermocells fulfilling the above requirement. The thermocell is created by solvent-induced selective [Fe(CN)6]4− crystallization from [Fe(CN)6]4−/[Fe(CN)6]3− couples in the hydrogel networks. The thermocell allows excellent anti-freezing and mechanically flexible properties, and enhanced ionic Seebeck effect in a wide temperature window (−33 ∼ 62 °C). Integrating 30 thermocells can efficiently harvest energy from a heat source and a frozen cold source. This system provides new insights into efficient low-grade heat harvest in wide scenarios.
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