Self-reaction Effect-boosted Liquid Thermocell Based on Ethanol-aqueous Biphasic System
ADVANCED MATERIALS TECHNOLOGIES（2023）
摘要
Low-grade heat (<100 C) energy sources possess considerable untapped potential for sustainable power generation. Liquid thermocells (LTCs) represent an innovative solution to convert low-grade heat into electricity. The performance of LTCs relies on the combined effects of the Seebeck coefficient (S-e), electrical conductivity (s(eff)), and thermal conductivity (K-eff). While previous studies have predominantly focused on enhancing S-e and s(eff), K-eff has received limited attention. Therefore, in this study, an electrochemically active biphasic liquid thermocell (EAB-LTC) composed offerrocene (Fc) and Fe(CN)(6)(3-) in an ethanol-aqueous biphasic system is proposed. The self-reaction of the redox couple enhances S-e, while the biphasic nature of the system suppresses thermal convection, resulting in reduced K-eff. Compared to the conventional single-phase LTC utilizing Fe(CN)(6)(3-) / Fe(CN)(6)(4-) , the S-e is increased by nearly threefold, accompanied by a more than threefold enhancement in output power. The application of the EAB-LTC module is successfully demonstrated in powering electronic devices, thereby establishing a novel pathway for advancing high-performance LTCs and presenting a promising approach toward achieving carbon neutrality.
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关键词
liquid thermocell
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