Insights into the Thermopower of Thermally Regenerative Electrochemical Cycle for Low Grade Heat Harvesting
Source abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced battery technologies research · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China
Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China
Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, Anhui 230026, China
Funding
Research Grants Council, University Grants Committee · Hong Kong Polytechnic University
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