Work

Thermal power generation during heat cycle near room temperature

Year: 2017

Type: article

Abstract: We demonstrate that a sodium-ion secondary battery (SIB)-type thermocell consisting of two types of Prussian blue analogue (PBA) with different electrochemical thermoelectric coefficients ( S EC ≡ ∂ V /∂ T ; V and T are the redox potential and temperature, respectively) produces electrical energy during heat cycles. The device produces an electrical energy of 2.3 meV/PBA per heat cycle between 295 K (= T L ) and 323 K (= T H ). The ideal thermal efficiency (η = 1.0%), which is evaluated using the heat capacity ( C = 4.16 meV/K) of ideal Na 2 Co[Fe(CN) 6 ], reaches 11% of the Carnot efficiency (η th = 8.7%). Our SIB-type thermocell is a promising thermoelectric device that harvests waste heat near room temperature.

Source: Applied Physics Express

DOI: 10.7567/apex.11.017101

Authors: Takayuki Shibata, Yuya Fukuzumi, Wataru Kobayashi, Yutaka Moritomo

Institutions: National Institute of Technology, Gunma College, University of Tsukuba, Tsukuba Research Center for Energy Materials Science

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $2,365