Issue 41, 2019

A CoHCF system with enhanced energy conversion efficiency for low-grade heat harvesting

Abstract

Thermally regenerative electrochemical cycles (TRECs) have drawn plenty of attention recently as an efficient and low-cost approach to convert heat to electricity. In this work, we report the application of cobalt hexacyanoferrate (CoHCF)-based materials in TRECs. When the battery is charged at a high temperature (TH) and discharged at a low temperature (TL), the discharge voltage is higher than the charge voltage due to the dependence of battery voltage on temperature, and thus low-grade heat can be converted into electricity. The temperature coefficient and specific heat of the material determine the energy conversion efficiency of the battery. When complexed with helical carbon nanotubes (HCNTs), the CoHCF/HCNTs show a higher absolute temperature coefficient and lower specific heat than pure CoHCF. Consequently, the heat-to-electricity conversion efficiency is greatly increased. It is suggested that moderately changing the temperature coefficient and specific heat is an effective strategy to further improve thermogalvanic performance of CoHCF-based materials.

Graphical abstract: A CoHCF system with enhanced energy conversion efficiency for low-grade heat harvesting

Supplementary files

Article information

Article type
Paper
Submitted
05 Ube 2019
Accepted
05 Mme 2019
First published
24 Mme 2019

J. Mater. Chem. A, 2019,7, 23862-23867

A CoHCF system with enhanced energy conversion efficiency for low-grade heat harvesting

J. Jiang, H. Tian, X. He, Q. Zeng, Y. Niu, T. Zhou, Y. Yang and C. Wang, J. Mater. Chem. A, 2019, 7, 23862 DOI: 10.1039/C9TA02426C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements