Self‐Reaction Effect‐Boosted Liquid Thermocell Based on Ethanol‐Aqueous Biphasic System

Author:

Liu Xiangyu1,Wang Taiyu1,Fang Jiale1,Fan Feng Ru1ORCID

Affiliation:

1. State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Xiamen University Xiamen 361005 China

Abstract

AbstractLow‐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 (Se), electrical conductivity (σeff), and thermal conductivity (κeff). While previous studies have predominantly focused on enhancing Se and σeff, κeff has received limited attention. Therefore, in this study, an electrochemically active biphasic liquid thermocell (EAB‐LTC) composed of ferrocene (Fc) and in an ethanol‐aqueous biphasic system is proposed. The self‐reaction of the redox couple enhances Se, while the biphasic nature of the system suppresses thermal convection, resulting in reduced κeff. Compared to the conventional single‐phase LTC utilizing / , the Se 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.

Funder

Fundamental Research Funds for the Central Universities

Natural Science Foundation of Fujian Province

National Natural Science Foundation of China

Publisher

Wiley

Subject

Industrial and Manufacturing Engineering,Mechanics of Materials,General Materials Science

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