Preprint Review Version 1 This version is not peer-reviewed

Prospects for hermetic sealing of scaled-up photoelectrochemical hydrogen generators for reliable and risk free operation

Version 1 : Received: 28 October 2019 / Approved: 29 October 2019 / Online: 29 October 2019 (10:19:46 CET)

A peer-reviewed article of this Preprint also exists.

Calnan, S.; Aschbrenner, S.; Bao, F.; Kemppainen, E.; Dorbandt, I.; Schlatmann, R. Prospects for Hermetic Sealing of Scaled-Up Photoelectrochemical Hydrogen Generators for Reliable and Risk Free Operation. Energies 2019, 12, 4176. Calnan, S.; Aschbrenner, S.; Bao, F.; Kemppainen, E.; Dorbandt, I.; Schlatmann, R. Prospects for Hermetic Sealing of Scaled-Up Photoelectrochemical Hydrogen Generators for Reliable and Risk Free Operation. Energies 2019, 12, 4176.

Journal reference: Energies 2019, 12, 4176
DOI: 10.3390/en12214176

Abstract

Photoelectrochemical systems have the potential to contribute to de-carbonation of the energy system because solar energy can be directly converted to hydrogen which can be burnt without the release of greenhouse gases. However, meaningful deployment of photoelectrochemical (PEC) technology in the global energy system, even when highly efficient scaled up devices become available, shall only be a reality when their safe and reliable operation can be guaranteed over serveral years of service life. The first part of the review discusses the importance of hermetic sealing of up scaled PEC device provided by the casing and sealing joints from a reliability and risk perspective. The second part of the review presents a survey of fully functional devices and early demonstrators and uses this to establish the extent to which the state of the art in PEC device design address the issue of hermetic sealing. The survey revealed that current material choices and sealing techniques are still unsuitable for scale –up and commercialization. Accordingly, we examined possible synergies with related photovoltaic and electrochemical devices that have been commericalised and derived therefrom, recommendations for future research routes that could accelerate the development of hermetic sealings of PEC devices.

Subject Areas

photoelectrochemical; solar hydrogen generator; hermetic sealing, reliability, safety, scale- up

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