Journal
ACS APPLIED ENERGY MATERIALS
Volume 1, Issue 4, Pages 1424-1428Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b00247
Keywords
thermocell; Seebeck coefficient; electrochemical thermal conversion; temperature coefficient; Pt-Sn catalyst
Funding
- National Science Foundation [ECCS-1542148]
- Japan Student Service Organization (JASSO) [L16171020003]
- University of California, San Diego
Ask authors/readers for more resources
An electrochemical thermocell realizes thermal to electric energy conversion when two electrodes operate the same reversible reaction but at different temperatures. Its Seebeck coefficient is determined by the entropy change of the redox reaction. Here we report a thermocell containing acetone and iso-propanol as the redox couple, which can achieve the highest reported Seebeck coefficient of -9.9 mV K-1 when the hot side is above the boiling point of acetone. Vaporization entropy of acetone increases the total entropy change in the conversion of iso-propanol to acetone. In addition, a concentration gradient of acetone caused by evaporation and condensation increases the cell voltage significantly. Stable performance of the thermocell is enabled by a Pt-Sn catalyst operating in a neutral pH electrolyte solution. The possibility of utilizing a liquid-gas phase change to increase the Seebeck coefficient of thermocells opens a new venue for exploration.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available