The surface of porous polyethylene (SB-PE) membrane is modified with nickel coating using a hydrothermal method (SB-PE-Ni-x membrane). To optimize effects of pore size and hydrophilicity on properties of SB-PE-Ni-x, the amount of included nickel is varied. According to evaluations, structure of SB-PE-Ni-x is well preserved even under strong alkaline due to the formation of nickel silicate shell. The nickel silicate shell induces the preservation of stability and hydrophilicity and increase in ionic conductivity, while porosity and pore size of SB-PE-Ni-x are reduced from 67.4 % and 0.819 µm (SB-PE) to 57.9% and 0.557 µm (SB-PE-Ni-100). Chemical characterizations show that when nickel is coated onto SB-PE, porous structure and chemical bonding of SB-PE-Ni-x remain unchanged with high water uptake (32.5%) even after alkali treatment. This is evidence of high ionic conductivity. The performances of aqueous organic redox flow batteries (AORFBs) using mixed naphthoquinone and potassium ferrocyanide dissolved in potassium hydroxide are then investigated with SB-PE and SB-PE-Ni-x membranes. As a result, AORFB using SB-PE-Ni-50 shows high energy efficiency (80 %) and low capacity loss rate (0.0235 Ah∙L^-1 per cycle). This is because SB-PE-Ni-50 has optimal pore size showing less cross-over of active materials and high ionic conductivity.

使用水热法（SB-PE-Ni-x膜）对多孔聚乙烯（SB-PE）膜的表面进行镀镍处理。为了优化孔径和亲水性对SB-PE-Ni-x性能的影响，要改变镍的含量。根据评估，由于形成了硅酸镍壳，即使在强碱性下，SB-PE-Ni-x的结构也能很好地保留。硅酸镍壳可保持稳定性和亲水性并增加离子电导率，而SB-PE-Ni-x的孔隙率和孔径从67.4％和0.819 µm（SB-PE）降低到57.9％和0.557 µm（ SB-PE-Ni-100）。化学特性表明，将镍涂覆在SB-PE上时，即使经过碱处理，吸水率高（32.5％）时，SB-PE-Ni-x的多孔结构和化学键仍保持不变。这是高离子电导率的证据。然后用SB-PE和SB-PE-Ni-x膜研究了将萘醌和亚铁氰化钾混合在氢氧化钾中的水性有机氧化还原液流电池（AORFB）的性能。结果，使用SB-PE-Ni-50的AORFB显示出高能效（80％）和低容量损耗率（0.0235 Ah∙L^-1）。这是因为SB-PE-Ni-50具有最佳的孔径，显示出较少的活性物质交叉和高离子电导率。