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首页> 外文期刊>ACS applied materials & interfaces >Water-in-Salt Electrolyte Promotes High-Capacity FeFe(CN)6 Cathode for Aqueous Al-Ion Battery
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Water-in-Salt Electrolyte Promotes High-Capacity FeFe(CN)6 Cathode for Aqueous Al-Ion Battery

机译:盐水电解质促进用于含水水溶液的高容量FeFe(CN)6阴极

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摘要

Prussian blue analogues (PBAs) are considered to be ideal multivalent cation host materials due to their unique open-framework structure. In aqueous solution, however, the PBAs’ cathodes have a low reversible capacity limited by the single electrochemical group Fe(CN)_(6)~(3–) and high crystal water content. They also suffer from fast cycle fading, resulting from significant oxygen/hydrogen evolution and cathode dissolution. In this work, a high-capacity PBA-type FeFe(CN)_(6) cathode with double transition metal redox sites is successfully demonstrated in 5 m Al(CF_(3)SO_(3))_(3) Water-in-Salt electrolyte (Al-WISE). Due to Al-WISE having a wide electrochemical window (2.65 V) and low dissolution of the cathode, our PBA cathode exhibits a high discharge capacity of 116 mAh/g and the superior cycle stability >100 cycles with capacity fading of 0.39% per cycle.
机译:由于其独特的开放式框架结构,普鲁士蓝色类似物(PBA)被认为是理想的多价阳离子主体材料。 然而,在水溶液中,PBA的阴极具有由单一电化学基团Fe(CN)_(6)〜(3-)和高晶体含量的低可逆容量。 它们还遭受快速循环褪色,由显着的氧/氢气进化和阴极溶解产生。 在这项工作中,在5M Al(CF_(3)SO_(3))中成功地证明了具有双过渡金属氧化还原位点的高容量PBA型FeFE(CN)_(6)阴极(CF_(3)SO_(3))_(3)水 -Salt电解质(Al-Wise)。 由于Al-Wise具有宽的电化学窗(2.65V)和阴极的低溶解,我们的PBA阴极表现出116mAh / g的高放电容量和高循环稳定性> 100个循环,容量衰落为每循环0.39% 。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第44期|共7页
  • 作者单位

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    School of Materials Science and Engineering Beijing Institute of Technology;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

    Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of Physics Chinese Academy of Sciences;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Water-in-Salt; aqueous electrolyte; concentrated electrolyte; Al-ion battery; aqueous battery; Prussian blue analogues; Al-ion cathode;

    机译:水 - 盐;水性电解质;浓缩电解质;Al离子电池;水电池;普鲁士蓝色类似物;Al离子阴极;

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