利用PEG修饰的α-环糊精的LCST性质提升水系I−/I3−热化学电池的塞贝克系数
Significantly Enhancing the Seebeck Coefficient of Aqueous I−/I3− Thermocell via the LCST Behavior of PEG-Modified α-Cyclodextrin
DOI: 10.12677/ms.2026.165096, PDF,    科研立项经费支持
作者: 王 愉, 邴兴浩, 刘兴亮, 梁益民*：青海大学化工学院，青海 西宁；彭 臻：西湖大学理学院，浙江 杭州
关键词: 热化学电池；主–客体包合；塞贝克系数；Thermocell； Host-Guest Interaction； Seebeck Coefficient
摘要: 热化学电池是一种通过氧化还原反应将温度差直接转化为电能的绿色能源器件。本研究基于(二)乙二醇单乙醚全取代的α-环糊精(α-CD)所表现出的最低共溶温度(LCST)特性，以及其与I3−之间的主–客体包合作用，成功将由I−/I3−构成的热化学电池的塞贝克系数(Se)提升至最高4.4 mV/K (即1 K的温差可产生4.4 mV电压)。这一数值为目前I−/I3−热化学电池体系中的最高水平，显著增强了其热电转换性能。此外，本研究所采用的(二)乙二醇单乙醚全取代α-CD仅需两步有机反应即可完成合成，且原料来源广泛、成本低廉，使其在热电能量转换领域展现出良好的实际应用前景。
Abstract: Thermocells are green energy devices that directly convert temperature differences into electrical energy through redox reactions. In this study, we exploit the lower critical solution temperature (LCST) behavior of oligoethylene glycols fully substituted α-cyclodextrin, along with its host-guest complexation with I3−, to significantly enhance the Seebeck coefficient (Se) of aqueous I−/I3− thermogalvanic cells. A maximum Se value of 4.4 mV/K was achieved (i.e., a temperature difference of 1 K generates a voltage of 4.4 mV), which represents the highest reported value for I−/I3−-based thermocells to date, leading to markedly improved thermoelectric performance. Moreover, the oligoethylene glycols fully substituted α-CD used in this work can be synthesized via a simple two-step organic synthetic process from inexpensive and readily available starting materials, highlighting its strong potential for practical applications in thermoelectric energy conversion.
文章引用：王愉, 彭臻, 邴兴浩, 刘兴亮, 梁益民. 利用PEG修饰的α-环糊精的LCST性质提升水系I−/I3−热化学电池的塞贝克系数[J]. 材料科学, 2026, 16(5): 24-33. https://doi.org/10.12677/ms.2026.165096

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