Publication

Photothermally Enhanced Hydrogel‐Based Thermoelectrochemical Cells for Stable, Passive Harvesting of Low‐Grade Heat

2026

Abstract

Low‐grade waste heat (60% relative to continuous discharge. A nine‐cell array directly recharges an electrochemical system using only low‐grade heat ( T H = 50°C). This work elucidates key mechanisms governing sustained performance and demonstrates a robust, scalable platform for passive harvesting of ubiquitous low‐grade heat toward self‐powered distributed electronics.

Official source

https://infoscience.epfl.ch/entities/publication/ab7699c3-c3c8-4341-a6e6-6362f2f37e1e

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ab7699c3-c3c8-4341-a6e6-6362f2f37e1e

About this result

Related concepts (32)

Waste heat

Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work. All such processes give off some waste heat as a fundamental result of the laws of thermodynamics. Waste heat has lower utility (or in thermodynamics lexicon a lower exergy or higher entropy) than the original energy source. Sources of waste heat include all manner of human activities, natural systems, and all organisms, for example, incandescent light bulbs get hot, a refrigerator warms the room air, a building gets hot during peak hours, an internal combustion engine generates high-temperature exhaust gases, and electronic components get warm when in operation.

Heat pump

A heat pump is a device that uses work to transfer heat from a cool space to a warm space by transferring thermal energy using a refrigeration cycle, cooling the cool space and warming the warm space. In cold weather a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house to the warmer outdoors in warm weather. As they transfer heat rather than generating heat, they are more energy-efficient than other ways of heating a home.

Reactor-grade plutonium

Reactor-grade plutonium (RGPu) is the isotopic grade of plutonium that is found in spent nuclear fuel after the uranium-235 primary fuel that a nuclear power reactor uses has burnt up. The uranium-238 from which most of the plutonium isotopes derive by neutron capture is found along with the U-235 in the low enriched uranium fuel of civilian reactors.

Related publications (32)

Photothermally Enhanced Hydrogel‐Based Thermoelectrochemical Cells for Stable, Passive Harvesting of Low‐Grade Heat

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