Perfect Matching Factor between a Customized Double-Junction GaAs Photovoltaic Device and an Electrolyzer for Efficient Solar Water Splitting
Perfect Matching Factor between a Customized Double-Junction GaAs Photovoltaic Device and an Electrolyzer for Efficient Solar Water Splitting
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DOI：
10.1021/acsaem.2c00768
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发表时间：
2022-06
影响因子：
6.4
通讯作者：
Zaki N. Zahran;Y. Miseki;E. Mohamed;Yuta Tsubonouchi;K. Makita;T. Sugaya;K. Sayama;M. Yagi
中科院分区：
文献类型：
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作者：
Zaki N. Zahran;Y. Miseki;E. Mohamed;Yuta Tsubonouchi;K. Makita;T. Sugaya;K. Sayama;M. Yagi
为适应高效电解槽的电流密度-电压特性，采用FeNiWOx/泡沫镍（NF）阳极和Pt/NF阴极，定制了GaAs/GaAs双结光伏（PV）器件。PV装置的定制导致PV装置和用于PV电解器（PVE）系统中的太阳能水分解的电解器之间的性能的完美匹配因子（MF = 99%）。在1个太阳照射条件下，证明了具有13.9%的高太阳能制氢效率（STH）的高效和稳定（一个月）的太阳能水分解。STH值与最新PVE系统中的最高值（14.2-16%）相当。高STH是基于PVE系统中电解槽的最高电-氢效率（ETH = 85%）的明显结果，其中电解槽中具有非贵金属基阳极和完美的MF值（99%）。这表明光伏器件和电解槽之间的完美匹配以及高效电解槽的开发成功地有助于STH和稳定性的大幅改善。
A photovoltaic (PV) device of double-junction GaAs/GaAs was customized to match up with the current density–voltage property of an efficient electrolyzer with a FeNiWOx/nickel foam (NF) anode and a Pt/NF cathode. The customization of the PV device resulted in a perfect matching factor (MF = 99%) in performances between the PV device and the electrolyzer for solar water splitting in a PV-electrolyzer (PVE) system. Efficient and stable (one-month) solar water splitting with a high solar-to-hydrogen efficiency (STH) of 13.9% was demonstrated under 1 sun irradiation conditions. The STH value is comparable with the top values (14.2–16%) in the state-of-art PVE systems. The high STH is based on an obvious progeny of the highest electricity-to-hydrogen efficiency (ETH = 85%) for the electrolyzers among the PVE systems with the non-precious metal-based anode in the electrolyzer and the perfect MF value (99%). This demonstrates that the perfect matching between the PV devices and the electrolyzers, as well as the development of the efficient electrolyzer successfully contribute to substantial improvement of STH and stability.