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Issue 2, 2021
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Solar-driven ionic power generation via a film of nanocellulose @ conductive metal–organic framework

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Abstract

Solar energy fits well with the increasing demand for clean sustainable energy. This paper describes a freestanding hybrid film composed of a conductive metal–organic framework layered on cellulose nanofibres which enables efficient solar power generation. The working principle, which is different from the mechanisms of traditional photovoltaic or solid-state thermoelectric generation systems, is based on ionic thermophoresis and electrokinetic effects. Given the strong light absorption and low thermal conductivity of the film, a large thermal gradient can be produced on the surface under light illumination to induce fast water evaporation in an aqueous electrolyte. The thermal gradient and the water evaporation drive selective ion transport through the charged nanochannels, which generates ionic thermoelectric and streaming potentials, respectively. The assembled device can produce a sustained voltage output of ∼1.1 V, with a high power density of up to 15 W m−2 under one sun illumination. This study provides a new route for solar power generation.

Graphical abstract: Solar-driven ionic power generation via a film of nanocellulose @ conductive metal–organic framework

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Supplementary files

Article information


Submitted
25 Aug 2020
Accepted
14 Jan 2021
First published
14 Jan 2021

This article is Open Access

Energy Environ. Sci., 2021,14, 900-905
Article type
Communication

Solar-driven ionic power generation via a film of nanocellulose @ conductive metal–organic framework

S. Zhou, Z. Qiu, M. Strømme and C. Xu, Energy Environ. Sci., 2021, 14, 900
DOI: 10.1039/D0EE02730H

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    [Original citation] - Published by The Royal Society of Chemistry.

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