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对Na+和Br-离子在用于Redox流电池的石墨烯氧化物基膜中的选择性和离子导电性研究

Raphael Flack¹, Anna Aixalà-Perelló^2,3, Alessandro Pedico^2,3

¹Department of Chemistry, Institute for Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan 590002, Israel.

|August 25, 2023

概括

石墨烯氧化物膜通过有效地阻断化物交叉并保持良好的离子导电性,对氧化还原流电池具有前景. 这些新的膜为昂贵的硫酸材料提供了潜在的低成本替代品.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

允许选择性膜对于氧化还原流电池 (RFB) 至关重要,以防止反应物交叉并确保寿命.
化物与阴解质 (Br3-/Br-) 的交叉是当前RFB设计的一个主要限制.
高硫酸 (PFSA) 膜虽然有效,但对于广泛采用RFB来说价格过高.

研究的目的:

研究石墨烯氧化物 (GO) 基膜作为RFBs的PFSA膜的经济有效替代品.
评估含有聚烯利 (PVP) 和伊米达 (Im) 的GO膜的离子导电性和选择性.
为了比较GO膜与标准PFSA膜的性能.

主要方法:

使用PVP作为粘合剂和Im作为连接剂制造GO膜.
电化学阻抗光谱测量Na+离子电导率.
在四个电极系统中的双隔间扩散电池,以评估Br-选择性.

主要成果:

GO膜的离子导电性与标准的PFSA膜相美.
GO膜表现出有效的永久选择性,显著减少了Br-交叉.
性能指标表明GO膜是一种可行的PFSA替代品.

结论:

石墨烯氧化物膜为提高RFB性能和寿命提供了一个有希望的,潜在的低成本解决方案.
开发的GO膜实现了适合RFB应用的离子导电性和选择性平衡.
对GO基膜的进一步研究可能会加速氧化还原流电池的商业化.

关键词:

功能化的功能化.石墨烯氧化物石墨烯氧化物纳米结构材料是一种纳米结构材料.允许选择性的选择性.质子交换膜中的质子交换膜.氧化还原流电池氧化还原流电池

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