Design Principle and Loss Engineering for Photovoltaic-Electrolysis Cell System.

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ID: 23258
2017
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Abstract
The effects of exchange current density, Tafel slope, system resistance, electrode area, light intensity, and solar cell efficiency were systematically decoupled at the converter-assisted photovoltaic-water electrolysis system. This allows key determinants of overall efficiency to be identified. On the basis of this model, 26.5% single-junction GaAs solar cell was combined with a membrane-electrode-assembled electrolysis cell (EC) using the dc/dc converting technology. As a result, we have achieved a solar-to-hydrogen conversion efficiency of 20.6% on a prototype scale and demonstrated light intensity tracking optimization to maintain high efficiency. We believe that this study will provide design principles for combining solar cells, ECs, and new catalysts and can be generalized to other solar conversion chemical devices while minimizing their power loss during the conversion of electrical energy into fuel.
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chang2017designacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chang, Woo Je;Lee, Kyung-Hwan;Ha, Heonjin;Jin, Kyoungsuk;Kim, Gunho;Hwang, Sun-Tae;Lee, Heon-Min;Ahn, Seh-Won;Yoon, Wonki;Seo, Hongmin;Hong, Jung Sug;Go, Yoo Kyung;Ha, Jung-Ik;Nam, Ki Tae;
Journal ACS omega
Year 2017
DOI
10.1021/acsomega.7b00012
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