Rigid crosslinkers towards constructing highly-efficient ion transport channels in anion exchange membranes

Hu, Chuan; Deng, Xiuli; Xin, Dong; Hong, Yanzhen; Zhang, Qiu Gen

doi:10.1016/j.memsci.2020.118806

Cited by 52 publications

(27 citation statements)

References 38 publications

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“…With the increasing of HCl content to 3%, negative charges were balanced and resulted in hydrogen bonds between SO 3 H and polymers, preventing the chains from slipping past each other under excessive tension. [27] Therefore, the hydrogel exhibited higher fracture stress, fracture strain, and toughness. However, excessive HCl led to a stiffening effect caused by more hydrogen bonds and the formation of the regularly arranged structure, thereby decreasing the mechanical properties.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

An Anti‐Swellable Hydrogel Strain Sensor for Underwater Motion Detection

Ren

Liu

Wang

et al. 2021

Adv Funct Materials

190

146

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Hydrogel-based wearable electronic devices have received increasing attention. However, the construction of underwater strain sensors remains a significant challenge because of the swelling of hydrogels in an aquatic environment. This work presents the fabrication of an antiswellable hydrogel composed of polyvinyl alcohol (PVA), a copolymer of [2-(methacryloyloxy) ethyl]dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) and 2-hydroxyethyl methacrylate. Interestingly, facile switch of the SBMA moiety from neutral to positively charged status at a low pH value leads to reduced osmotic pressure of the hydrogel for electrostatic repulsion-driven elimination of water molecules and anti-swelling. The resulting anti-swellable hydrogel exhibits high toughness (518 kJ m −3 ) and compressive modulus (8.12 Mpa), ionic conductivity (up to 4.58 S m −1 ), and anti-swelling behavior (equilibrium swelling ratio of 9% in water for 30 days). An underwater strain sensor based on this anti-swellable hydrogel is further developed to monitor the movements of underwater sports. High sensitivity is achieved to identify multidirectional motions, including raising the head, swinging the arm, bending the elbow, knee and finger. Therefore, this study offers a facile strategy to generate hydrogel-based sensors that can be adopted in an underwater environment as well as expands the potential applications of wearable electronic devices.

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Section: Mechanical Propertiesmentioning

confidence: 97%

An Anti‐Swellable Hydrogel Strain Sensor for Underwater Motion Detection

Ren

Liu

Wang

et al. 2021

Adv Funct Materials

190

146

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“…However, the mechanical properties and dimensional stability of AEMs are inevitably sacriced upon an increase of IEC due to excessive water uptake and the swelling ratio. 11,[24][25][26] Therefore, most AEMs exhibit low OH À conductivity, inferior mechanical properties and dimensional stability, and poor chemical durability.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the crosslinked network restricts the spatial motion of polymer chains, thereby decreasing the ion conductivity. 24,40 In contrast, the RCM technique is considered the most efficient approach for fabricating mechanically tough and durable membranes, 41 so it is widely employed for commercialization. For example, many commercialized PEMs are reinforced membranes prepared by integrating polyelectrolytes into a robust reinforced substrate, such as "Gore-Select" or "JMFC" membranes.…”

Section: Introductionmentioning

confidence: 99%

Robust and durable poly(aryl-co-aryl piperidinium) reinforced membranes for alkaline membrane fuel cells

Park

Kim

et al. 2022

J. Mater. Chem. A

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“…[17][18][19] Its performance directly affects the efficiency and service life of fuel cells. Ideal qualities of AEMs required by solid alkaline fuel cell are high ion conductivity, [20,21] excellent alkaline stability, [22][23][24] low dimensional swelling, [25][26][27] and good mechanical properties. [28][29][30] However, the performance of currently commercialized AEMs based on quaternized polystyrene resins is far from the actual application requirements of fuel cells.…”

Section: Progress In High-performance Anion Exchange Membranes Based On the Design Of Stable Cations For Alkaline Fuel Cellsmentioning

confidence: 99%

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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Rigid crosslinkers towards constructing highly-efficient ion transport channels in anion exchange membranes

Cited by 52 publications

References 38 publications

An Anti‐Swellable Hydrogel Strain Sensor for Underwater Motion Detection

An Anti‐Swellable Hydrogel Strain Sensor for Underwater Motion Detection

Robust and durable poly(aryl-co-aryl piperidinium) reinforced membranes for alkaline membrane fuel cells

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

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