{"title":"用于工业规模电解水的具有双立体交叉中心的生物启发阴离子交换膜","authors":"Tang Tang, Husileng Lee, Zhiwei Wang, Zhiheng Li, Linqin Wang, Dexin Chen, Wentao Zheng, Qinglu Liu, Lanlan He, Guoheng Ding, Ziyu Tian, Licheng Sun","doi":"10.1039/d4ee02428a","DOIUrl":null,"url":null,"abstract":"OH<small><sup>−</sup></small> transport through anion exchange membranes (AEMs) is influenced by the arrangement of ion channels. Inspired by the channel structure of pectin in plants, a precise molecular regulation approach has here been developed for designing high-performance AEMs. This approach utilizes two steric molecules, triptycene and 9,9′-spirobifluorene, as dual spatially cross-linking centers in AEMs. By incorporating both of these steric centers into poly(terphenyl piperidinium), the pore structure stability, ionic conductivity, and mechanical strength are further improved. This variant achieved a high OH<small><sup>−</sup></small> conductivity of 197.4 mS cm<small><sup>−1</sup></small> and a significantly low swelling ratio of 8.6% at 80 °C. These characteristics enable the use of AEM water electrolysis (AEM-WE) for the achievement of a current density of 8.4 A cm<small><sup>−2</sup></small> at 2.0 V when using completely platinum group metal (PGM)-free catalysts. This device also demonstrated high performance by achieving a current density of 2.0 A cm<small><sup>−2</sup></small> at a cell voltage of 1.77 V at 60 °C, along with excellent stability (aging rate of 0.077 mV h<small><sup>−1</sup></small>). It should be noted that an electrode cell based on a five-stacked-membrane, with a total flow-field area of 1250 cm<small><sup>2</sup></small>, has been used in the present study. In addition, this cell device allowed for a current density of 20 000 A m<small><sup>−2</sup></small> at a cell voltage of 2.0 V. 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This device also demonstrated high performance by achieving a current density of 2.0 A cm<small><sup>−2</sup></small> at a cell voltage of 1.77 V at 60 °C, along with excellent stability (aging rate of 0.077 mV h<small><sup>−1</sup></small>). It should be noted that an electrode cell based on a five-stacked-membrane, with a total flow-field area of 1250 cm<small><sup>2</sup></small>, has been used in the present study. In addition, this cell device allowed for a current density of 20 000 A m<small><sup>−2</sup></small> at a cell voltage of 2.0 V. 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引用次数: 0
摘要
OH- 通过阴离子交换膜(AEM)的传输受离子通道排列的影响。受植物果胶通道结构的启发,我们开发了一种精确的分子调控方法来设计高性能的 AEM。这种方法利用两个立体分子--三庚烯和 9,9′-螺二芴--作为 AEM 的双重空间交联中心。通过将这两个立体交叉中心加入聚(三联苯哌啶)中,孔结构的稳定性、离子传导性和机械强度都得到了进一步提高。该变体在 80 °C 时的 OH- 导电率高达 197.4 mS cm-1,膨胀率低至 8.6%。这些特性使 AEM 水电解(AEM-WE)在 2.0 V 电压下的电流密度达到了 8.4 A cm-2,并使用了完全不含铂族金属 (PGM) 的催化剂。该装置还表现出高性能,在 60 °C 时电池电压为 1.77 V,电流密度达到 2.0 A cm-2,而且稳定性极佳(老化率为 0.077 mV h-1)。值得注意的是,本研究中使用的电极电池基于五层叠加膜,总流场面积为 1250 平方厘米。此外,在 2.0 V 的电池电压下,该电池装置的电流密度可达 20 000 A m-2。这里开发的分子调控方法正是不含 PGM 的 AEM-WE 系统在工业应用中大有可为的策略。
Bioinspired anion exchange membranes with dual steric cross-linking centers for industrial-scale water electrolysis
OH− transport through anion exchange membranes (AEMs) is influenced by the arrangement of ion channels. Inspired by the channel structure of pectin in plants, a precise molecular regulation approach has here been developed for designing high-performance AEMs. This approach utilizes two steric molecules, triptycene and 9,9′-spirobifluorene, as dual spatially cross-linking centers in AEMs. By incorporating both of these steric centers into poly(terphenyl piperidinium), the pore structure stability, ionic conductivity, and mechanical strength are further improved. This variant achieved a high OH− conductivity of 197.4 mS cm−1 and a significantly low swelling ratio of 8.6% at 80 °C. These characteristics enable the use of AEM water electrolysis (AEM-WE) for the achievement of a current density of 8.4 A cm−2 at 2.0 V when using completely platinum group metal (PGM)-free catalysts. This device also demonstrated high performance by achieving a current density of 2.0 A cm−2 at a cell voltage of 1.77 V at 60 °C, along with excellent stability (aging rate of 0.077 mV h−1). It should be noted that an electrode cell based on a five-stacked-membrane, with a total flow-field area of 1250 cm2, has been used in the present study. In addition, this cell device allowed for a current density of 20 000 A m−2 at a cell voltage of 2.0 V. The molecular regulation approach developed here precisely represents a promising strategy for industrial applications of PGM-free AEM-WE systems.
期刊介绍:
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).