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Highly Antifreezing Thermogalvanic Hydrogels for Human Heat Harvesting in Ultralow Temperature Environments
Nano Letters ( IF 9.6 ) Pub Date : 2023-12-01 , DOI: 10.1021/acs.nanolett.3c03818 Ding Zhang 1 , Yuetong Zhou 1 , Yin Mao 1 , Qi Li 1 , Lili Liu 1 , Peijia Bai 1 , Rujun Ma 1
Nano Letters ( IF 9.6 ) Pub Date : 2023-12-01 , DOI: 10.1021/acs.nanolett.3c03818 Ding Zhang 1 , Yuetong Zhou 1 , Yin Mao 1 , Qi Li 1 , Lili Liu 1 , Peijia Bai 1 , Rujun Ma 1
Affiliation
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Thermogalvanic hydrogels have been quickly developed and are widely used in thermal energy harvesting. However, the freezing behaviors of thermogalvanic hydrogels at subzero temperatures greatly limit their practical applications. Herein, we design an antifreezing thermogalvanic hydrogel based on [Fe(CN)6]3–/4– ions for thermoelectric power generation in ultralow temperature environments. The antifreezing thermogalvanic hydrogels show excellent flexibility at −80 °C owing to the hydrogen bonding between ethylene glycol and water molecules. Even after 500 cyclic tensile strains, the thermogalvanic hydrogels can still maintain excellent mechanical stability, and the Seebeck coefficient is as high as 1.43 mV/K, corresponding to a large retention rate of ∼95%. Moreover, we demonstrate a wearable thermoelectric shoe based on antifreezing thermogalvanic hydrogels for harvesting human thermal energy in a simulated winter environment of −30 °C, and the electricity can drive a green LED. This work provides important guidance for the design and optimization of antifreezing thermogalvanic hydrogels.
中文翻译：
用于超低温环境下人体热量收集的高抗冻热电偶水凝胶
热电水凝胶已迅速发展并广泛应用于热能收集。然而，热电偶水凝胶在零下温度下的冻结行为极大地限制了其实际应用。在此，我们设计了一种基于[Fe(CN) 6 ] 3–/4–离子的防冻热电偶水凝胶，用于超低温环境下的热电发电。由于乙二醇和水分子之间的氢键作用，防冻热电偶水凝胶在-80℃下表现出优异的柔韧性。即使经过500次循环拉伸应变后，热电偶水凝胶仍能保持优异的机械稳定性，塞贝克系数高达1.43 mV/K，相当于~95%的大保留率。此外，我们展示了一种基于防冻热电水凝胶的可穿戴热电鞋，用于在-30°C的模拟冬季环境中收集人体热能，并且电力可以驱动绿色LED。该工作为防冻热电偶水凝胶的设计和优化提供了重要指导。
更新日期：2023-12-01
中文翻译：
用于超低温环境下人体热量收集的高抗冻热电偶水凝胶
热电水凝胶已迅速发展并广泛应用于热能收集。然而，热电偶水凝胶在零下温度下的冻结行为极大地限制了其实际应用。在此，我们设计了一种基于[Fe(CN) 6 ] 3–/4–离子的防冻热电偶水凝胶，用于超低温环境下的热电发电。由于乙二醇和水分子之间的氢键作用，防冻热电偶水凝胶在-80℃下表现出优异的柔韧性。即使经过500次循环拉伸应变后，热电偶水凝胶仍能保持优异的机械稳定性，塞贝克系数高达1.43 mV/K，相当于~95%的大保留率。此外，我们展示了一种基于防冻热电水凝胶的可穿戴热电鞋，用于在-30°C的模拟冬季环境中收集人体热能，并且电力可以驱动绿色LED。该工作为防冻热电偶水凝胶的设计和优化提供了重要指导。
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