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Article: Direct thermal charging cell for converting low-grade heat to electricity

TitleDirect thermal charging cell for converting low-grade heat to electricity
Authors
Keywordsaction potential
cell regeneration
cyclic potentiometry
electric capacitance
electric potential
Issue Date2019
PublisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2019, v. 10, p. article no. 4151 How to Cite?
AbstractEfficient low-grade heat recovery can help to reduce greenhouse gas emission as over 70% of primary energy input is wasted as heat, but current technologies to fulfill the heat-to-electricity conversion are still far from optimum. Here we report a direct thermal charging cell, using asymmetric electrodes of a graphene oxide/platinum nanoparticles cathode and a polyaniline anode in Fe2+/Fe3+ redox electrolyte via isothermal heating operation. When heated, the cell generates voltage via a temperature-induced pseudocapacitive effect of graphene oxide and a thermogalvanic effect of Fe2+/Fe3+, and then discharges continuously by oxidizing polyaniline and reducing Fe3+ under isothermal heating till Fe3+ depletion. The cell can be self-regenerated when cooled down. Direct thermal charging cells attain a temperature coefficient of 5.0 mV K−1 and heat-to-electricity conversion efficiency of 2.8% at 70 °C (21.4% of Carnot efficiency) and 3.52% at 90 °C (19.7% of Carnot efficiency), outperforming other thermoelectrochemical and thermoelectric systems.
Persistent Identifierhttp://hdl.handle.net/10722/279571
ISSN
2017 Impact Factor: 12.353
2015 SCImago Journal Rankings: 6.539
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorWANG, X-
dc.contributor.authorHuang, YT-
dc.contributor.authorLiu, C-
dc.contributor.authorMU, K-
dc.contributor.authorLI, KH-
dc.contributor.authorWANG, S-
dc.contributor.authorYANG, Y-
dc.contributor.authorWang, L-
dc.contributor.authorSu, CH-
dc.contributor.authorFeng, SP-
dc.date.accessioned2019-11-01T07:19:54Z-
dc.date.available2019-11-01T07:19:54Z-
dc.date.issued2019-
dc.identifier.citationNature Communications, 2019, v. 10, p. article no. 4151-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/279571-
dc.description.abstractEfficient low-grade heat recovery can help to reduce greenhouse gas emission as over 70% of primary energy input is wasted as heat, but current technologies to fulfill the heat-to-electricity conversion are still far from optimum. Here we report a direct thermal charging cell, using asymmetric electrodes of a graphene oxide/platinum nanoparticles cathode and a polyaniline anode in Fe2+/Fe3+ redox electrolyte via isothermal heating operation. When heated, the cell generates voltage via a temperature-induced pseudocapacitive effect of graphene oxide and a thermogalvanic effect of Fe2+/Fe3+, and then discharges continuously by oxidizing polyaniline and reducing Fe3+ under isothermal heating till Fe3+ depletion. The cell can be self-regenerated when cooled down. Direct thermal charging cells attain a temperature coefficient of 5.0 mV K−1 and heat-to-electricity conversion efficiency of 2.8% at 70 °C (21.4% of Carnot efficiency) and 3.52% at 90 °C (19.7% of Carnot efficiency), outperforming other thermoelectrochemical and thermoelectric systems.-
dc.languageeng-
dc.publisherNature Research (part of Springer Nature): Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectaction potential-
dc.subjectcell regeneration-
dc.subjectcyclic potentiometry-
dc.subjectelectric capacitance-
dc.subjectelectric potential-
dc.titleDirect thermal charging cell for converting low-grade heat to electricity-
dc.typeArticle-
dc.identifier.emailHuang, YT: ythuang@connect.hku.hk-
dc.identifier.emailLiu, C: willmole@hku.hk-
dc.identifier.emailFeng, SP: hpfeng@hku.hk-
dc.identifier.authorityFeng, SP=rp01533-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-019-12144-2-
dc.identifier.pmid31515483-
dc.identifier.pmcidPMC6742635-
dc.identifier.scopuseid_2-s2.0-85072144509-
dc.identifier.hkuros308563-
dc.identifier.volume10-
dc.identifier.spagearticle no. 4151-
dc.identifier.epagearticle no. 4151-
dc.publisher.placeUnited Kingdom-

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