一种能量密度高、性能强大且坚固耐用的双极锌-二茂铁氧化还原液流电池。
An Energy-Dense, Powerful, Robust Bipolar Zinc-Ferrocene Redox-Flow Battery.
作者信息
Luo Jian, Hu Bo, Hu Maowei, Wu Wenda, Liu T Leo
机构信息
Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322, USA.
出版信息
Angew Chem Int Ed Engl. 2022 Jul 25;61(30):e202204030. doi: 10.1002/anie.202204030. Epub 2022 Jun 10.
Zinc metal represents a low-cost, high-capacity anode material to develop energy-dense aqueous redox-flow batteries (RFB). However, the energy-storage applications of traditional inorganic Zn halide flow batteries are primarily plagued by the material challenges of traditional halide cathode electrolytes (e.g., bromine), including corrosion, toxicity, and severe crossover. Herein, we report a bipolar zinc-ferrocene salt compound, zinc 1,1'-bis(3-sulfonatopropyl)ferrocene, Zn[Fc(SPr) ] (1.80 M solubility or 48.2 Ah L charge storage capacity)-a robust, energy-dense, bipolar redox-active electrolyte material for RFBs. Zn[Fc(SPr) ]-based redox-flow batteries operated at high current densities of up to 200 mA cm and delivered an energy efficiency of up to 81.5 % and a power density of up to 270.5 mW cm . A Zn[Fc(SPr) ] flow battery demonstrated an energy density of 20.2 Wh L and displayed nearly 100 % capacity retention for 2000 cycles (1284 h or 53.5 days).
锌金属是一种低成本、高容量的负极材料，可用于开发能量密集型水系氧化还原液流电池（RFB）。然而，传统无机卤化锌液流电池的储能应用主要受到传统卤化物阴极电解质（如溴）材料方面的挑战困扰，包括腐蚀、毒性和严重的交叉渗透。在此，我们报道了一种双极锌 - 二茂铁盐化合物，1,1'-双(3-磺丙基)二茂铁锌，Zn[Fc(SPr)₂]（溶解度为1.80 M或电荷存储容量为48.2 Ah·L）——一种用于RFB的坚固、能量密集型双极氧化还原活性电解质材料。基于Zn[Fc(SPr)₂]的氧化还原液流电池在高达200 mA·cm²的高电流密度下运行，能量效率高达81.5%，功率密度高达270.5 mW·cm²。一种Zn[Fc(SPr)₂]液流电池的能量密度为20.2 Wh·L，在2000次循环（1284小时或53.5天）中显示出近100%的容量保持率。
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