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A Long Lifetime Aqueous Organic Solar Flow Battery

机译：长寿命的水性有机太阳能液流电池

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摘要

Monolithically integrated solar flow batteries (SFBs) hold promise as compact stand-alone energy systems for off-grid solar electrification. Although considerable research is devoted to studying and improving the round-trip efficiency of SFBs, little attention is paid to the device lifetime. Herein, a neutral pH aqueous electrolyte SFB with robust organic redox couples and inexpensive silicon-based photoelectrodes is demonstrated. Enabled by the excellent stability of both electrolytes and protected photoelectrodes, this SFB device exhibits not only unprecedented stable continuous cycling performance over 200 h but also a capacity utilization rate higher than 80%. Moreover, through comprehensive study on the working mechanisms of SFBs, a new theory based on instantaneous solar-to-output electricity efficiency toward more optimized device design is developed and a significantly improved solar-to-output electricity efficiency of 5.4% from single-junction silicon photoelectrodes is realized. The design principles presented in this work for extending device lifetime and boosting round trip energy efficiency will make SFBs more competitive for off-grid applications.
机译：单片集成太阳能液流电池（SFB）有望成为紧凑型独立能源系统，用于离网太阳能电气化。尽管有大量研究致力于研究和提高SFB的往返效率，但对设备寿命的关注却很少。本文中，展示了具有坚固的有机氧化还原对和廉价的硅基光电电极的中性pH水溶液电解质SFB。由于电解质和受保护的光电极均具有出色的稳定性，该SFB器件不仅在200小时内表现出前所未有的稳定连续循环性能，而且容量利用率超过80％。此外，通过对SFB的工作机制进行全面研究，开发了一种基于瞬时太阳能到输出电力效率朝着更优化的器件设计的新理论，并且单结的太阳能到输出电力效率显着提高了5.4％实现了硅光电极。这项工作中提出的延长设备寿命和提高往返能效的设计原则将使SFB在离网应用中更具竞争力。

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  • 来源
    《Advanced energy materials》 |2019年第31期|1900918.1-1900918.8|共8页
  • 作者

    Li Wenjie; Kerr Emily; Goulet Marc-Antoni; Fu Hui-Chun; Zhao Yuzhou; Yang Ying; Veyssal Atilla; He Jr-Hau; Gordon Roy G.; Aziz Michael J.; Jin Song;

  • 作者单位

    Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA;

    Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA;

    Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA;

    King Abdullah Univ Sci & Technol, Div Comp Elect & Math Sci & Engn, Thuwal 239556900, Saudi Arabia;

    Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA;

    Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA|Northwest Univ, Coll Chem & Mat Sci, Shaanxi Prov Key Lab Electroanalyt Chem, Key Lab Synthet & Nat Funct Mol Chem,Minist Educ, Xian 710127, Shaanxi, Peoples R China;

    Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA;

    King Abdullah Univ Sci & Technol, Div Comp Elect & Math Sci & Engn, Thuwal 239556900, Saudi Arabia;

    Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA|Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA;

    Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA;

    Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    electrochemistry; integrated devices; redox flow batteries; solar energy; solar flow batteries;

    机译：电化学;集成装置;氧化还原流量;太阳能;太阳能电池;

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