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Updated: Jan 14, 2026

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
Published on: February 5, 2020
Comment on 'Spontaneous heat current and ultra-high thermal rectification in asymmetric graphene: a molecular
1Department of Materials Science & Metallurgy, University of Cambridge, Cambridge CB3 0FS, United Kingdom.
None:
Recently, Yousefiet al(2025Nanotechnology36135401) reported simulations of a graphene thermal rectifier which apparently predict ultra-high thermal rectification and a spontaneous heat current. We show that these results originate from an off-set in the predicted dependence of heat current on temperature difference which contravenes accepted laws of thermodynamics and so is presumably an artefact of the modelling procedure employed in the study.
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