Insights into the Thermopower of Thermally Regenerative Electrochemical Cycle for Low Grade Heat Harvesting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
View graph of relations

Author(s)

  • Chun Cheng
  • Sijia Wang
  • Peng Tan
  • Yawen Dai
  • Jie Yu
  • Rui Cheng
  • Meng Ni

Detail(s)

Original languageEnglish
Pages (from-to)329-336
Journal / PublicationACS Energy Letters
Volume6
Issue number2
Online published31 Dec 2020
Publication statusPublished - 12 Feb 2021
Externally publishedYes

Abstract

The thermally regenerative electrochemical cycle (TREC) is a promising technology for converting low-grade heat (<100 °C) to electrical power. In this work, the TREC with the NiHCF cathode and Zn anode achieves a markedly high thermopower (α) of -1.575 mV K-1 and a heat-to-electricity efficiency of 2.41% at the temperature difference of 30 °C (equivalent to 25.15% of Carnot efficiency), surpassing all the existing TREC systems. For the first time, the mixed membranes with mixed pH electrolytes are introduced in the TREC systems to boost α to a record-high value of -2.270 mV K-1. The proposed thermodynamic framework advances the understanding on the origin of α and electrochemical potential, which will guide people to engineer TRECs.

Citation Format(s)

Insights into the Thermopower of Thermally Regenerative Electrochemical Cycle for Low Grade Heat Harvesting. / Cheng, Chun; Wang, Sijia; Tan, Peng et al.

In: ACS Energy Letters, Vol. 6, No. 2, 12.02.2021, p. 329-336.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review