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Monolithic Solar Seawater Battery: Seawater-Mediated Solar-to-Sodium Conversion with 8.0 % Efficiency by Bismuth Vanadate Photoanode - Photovoltaic Tandem Cell

68 Pages Posted: 16 Oct 2018 Sneak Peek Status: Under Review

See all articles by Jin Hyun Kim

Jin Hyun Kim

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Soo Min Hwang

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Inchan Hwang

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Jinhyup Han

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Jeong Hun Kim

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Yim Hyun Jo

Korea Institute of Energy Research (KIER) - Advanced Center for Energy

Kwanyong Seo

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

Youngsik Kim

Ulsan National Institute of Science and Technology (UNIST) - School of Energy and Chemical Engineering

Jae Sung Lee

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

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Abstract

Conversion of sunlight to chemical energy based on photoelectrochemical (PEC) processes has been considered as a promising strategy for solar energy harvesting. Here, we propose a novel platform that converts solar energy into sodium (Na) as a solid-state solar fuel via the PEC oxidation of natural seawater, for which a Na ion-selective ceramic membrane is employed together with photoelectrode (PE)-photovoltaic (PV) tandem cell. Using an elaborately modified bismuth vanadate-based PE in tandem with crystalline silicon PV, we demonstrate unassisted solar-to-Na conversion with an unprecedentedly high efficiency of 8 % and long-term stability, suggesting a new benchmark for low-cost, efficient and scalable solid solar fuel production. The sodium turns easily into electricity on demand making the device a nature-friendly, monolithic solar seawater battery.

Suggested Citation

Kim, Jin Hyun and Hwang, Soo Min and Hwang, Inchan and Han, Jinhyup and Kim, Jeong Hun and Jo, Yim Hyun and Seo, Kwanyong and Kim, Youngsik and Lee, Jae Sung, Monolithic Solar Seawater Battery: Seawater-Mediated Solar-to-Sodium Conversion with 8.0 % Efficiency by Bismuth Vanadate Photoanode - Photovoltaic Tandem Cell (October 16, 2018). Available at SSRN: https://ssrn.com/abstract=3266869 or http://dx.doi.org/10.2139/ssrn.3266869
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Jin Hyun Kim

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Soo Min Hwang

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Inchan Hwang

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Jinhyup Han

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Jeong Hun Kim

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Yim Hyun Jo

Korea Institute of Energy Research (KIER) - Advanced Center for Energy

Ulsan 44919
Korea, Republic of (South Korea)

Kwanyong Seo

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Youngsik Kim

Ulsan National Institute of Science and Technology (UNIST) - School of Energy and Chemical Engineering

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

Jae Sung Lee (Contact Author)

Ulsan National Institute of Science and Technology (UNIST) - Department of Energy Engineering ( email )

gil 50
Ulsan, 689-798
Korea, Republic of (South Korea)

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