Ring-opening metathesis polymerization of cobaltocenium derivative to prepare anion exchange membrane with high ionic conductivity

Yuan, Haomiao; Liu, Ye; Tsai, Tsung‐Han; Liu, Xiaohui; Kim, Sang Bum; Gupta, Robin; Zhang, Wenxu; Ertem, S. Piril; Seifert, Söenke; Herring, Andrew M.; Coughlin, E. Bryan

doi:10.1016/j.poly.2020.114462

Cited by 19 publications

(18 citation statements)

References 41 publications

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Section: Metal Cations For Anion Exchange Membranesmentioning

confidence: 99%

“…www.advmattechnol.de month in strong alkaline solution at 80 °C. Yuan et al [115] synthesized cobaltocenium-containing random copolymer membrane (Figure 7d) through ROMP. The chloride conductivity of this membrane (IEC = 1.5 mmol g −1 ) reached 50 mS cm −1 at 90 °C, which was unusually high considering the random polymer structure.…”

Section: Metal Cations For Anion Exchange Membranesmentioning

confidence: 99%

mentioning

confidence: 99%

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Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Tao

Wang

Zhao

et al. 2021

Adv Materials Technologies

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Solid alkaline fuel cells with anion exchange membranes (AEMs) have drawn wide attention and have become an important focus in the field of renewable energy cells in recent years due to their high electrode activity, potential application of non‐precious metal catalysts, and relatively low requirements for fuel purity. AEM is the central component in solid alkaline fuel cells, and plays the role of conducting ions, blocking fuel crossover and providing catalyst support in fuel cells. Its performance directly affects the efficiency and service life of fuel cells. With some exceptions, the majority of AEMs have relatively low hydroxide conductivity and poor durability, which cannot meet the requirements of practical applications. The past decade has witnessed great progress in AEM designs and stability. Various kinds of AEMs with different cationic structures have been designed, and their properties and application in fuel cells are investigated. This review provides a comparative investigation and summary of highlights from the design of cationic structures for AEMs, including cyclic and spirocyclic quaternary ammonium cations, modified quaternary phosphonium, modified imidazoles, guanidinium, and metal cations. The authors’ perspective on the remaining challenges and directions of AEMs research for future development are also discussed.

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Section: Metal Cations For Anion Exchange Membranesmentioning

confidence: 99%

Section: Metal Cations For Anion Exchange Membranesmentioning

confidence: 99%

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Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Tao

Wang

Zhao

et al. 2021

Adv Materials Technologies

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“…Hence, we hypothesized that a delicate structure design of organometallic vinyl monomers would offer a feasible approach toward new types of periodic metallopolymers. Among them, metallocene families are a class of efficient building block precursors used to incorporate metal functions into monomers or polymers due to their optional metal species and accessible substituted derivatives obtained by us − and others. ,− …”

Section: Introductionmentioning

confidence: 99%

Sequence-Controlled Metallopolymers: Synthesis and Properties

et al. 2021

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Sequence-controlled organometallic polymers are prepared by regioselective ring-opening metathesis polymerization (ROMP) of multiple-substituted cyclooctene monomers with a built-in sequence of the metal-containing substituents. The side-chain metal functions of these metallopolymers are consist of metallocenes, i.e., ferrocene and ruthenocene. The photophysical, thermal, and electrochemical properties can be finely tailored by the metallocene sequence along the polymer chain. This work provides fundamental understanding to unveil the structure–property relationship of sequence-controlled metallopolymers. This highly efficient chain-growth polymerization is expected to incorporate a variety of metal moieties into a single organometallic polymer with site specificity, architectural complexity, and functional versatility. The new sequence-controlled metallopolymers are expected to provide access to materials with potential applications for electrochemical sensing, information processing, and magnetic materials.

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“…As a result of the Hoffman elimination (E2) and nucleophilic substitution (SN 2 ) reactions, the traditional cationic functional group will quickly become invalid. 24,25 Currently, researchers are trying to use organometallic cations, such as cobaltocenium 26,27 and phosphonium. 28 However, these cationic functional groups are expensive as a result of extremely difficult preparation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of an Anion Exchange Membrane by Pyridine-Functionalized Polyether Ether Ketone To Improve Alkali Resistance Stability for an Alkali Fuel Cell

2021

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A highly stable anion exchange membrane (AEM) is constructed by linking bipyridine to a polyetheretherketone (PEEK) polymer. First, PEEK is prepared by the polycondensation reaction; N-bromosuccinimide and benzoyl peroxide are used for the bromination reaction; and then pyridine or 4,4′-bipyridine is connected to PEEK by the Friedel–Crafts alkylation reaction. The successful preparation of the target product was confirmed by the collaborative analysis of the Fourier transform infrared spectrum and 1H nuclear magnetic resonance spectrum. The ionic conductivity test showed that the highest hydroxide conductivity of PyBPEEK-50% and BiPyBPEEK-50% at 80 °C reached 36.99 and 32.05 mS cm–1, respectively, which proved that they can meet the basic requirements. The alkali stability test showed that the ionic conductivity of the membrane could still reach 88.46% after 750 h of immersion in 1 M NaOH at room temperature, which proved that the cross-linking structure composed of 4,4′-bipyridine effectively weakened the attack of OH– on AEMs. In addition, the cross-linked structure effectively balances the loss of mechanical properties as a result of water absorption and membrane swelling. The swelling rate of BiPyBPEEK-50% at 80 °C is only 4.4%, and the tensile strength can reach 66 MPa. Therefore, to avoid the introduction of too many uncontrollable factors in the complicated synthesis process, this work used a simple method to synthesize AEMs based on the bipyridine cross-linked structure and compared its performance gains and losses through non-cross-linked membranes. The potential application value of this method in the field of fuel cells is verified.

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Ring-opening metathesis polymerization of cobaltocenium derivative to prepare anion exchange membrane with high ionic conductivity

Cited by 19 publications

References 41 publications

Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Progress in High‐Performance Anion Exchange Membranes Based on the Design of Stable Cations for Alkaline Fuel Cells

Sequence-Controlled Metallopolymers: Synthesis and Properties

Preparation of an Anion Exchange Membrane by Pyridine-Functionalized Polyether Ether Ketone To Improve Alkali Resistance Stability for an Alkali Fuel Cell

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