journal article·2022-02-23

Superprotonic Conductivity of a Functionalized Metal–Organic Framework at Ambient Conditions

Xiao-Min Li, Yameng Wang, Yongbiao Mu, Jiang Liu, Lin Zeng, Ya-Qian Lan

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Abstract

Seeking fast proton transport pathways at ambient conditions is desirable but challenging. Here, we report a strategy to synthesize a composite material with a polyoxometalate (POM) and an ionic liquid (IL) confined in stable metal–organic framework (MOF) channels through electrostatic interaction. The obtained SO3H-IL-PMo12@MIL-101 possesses fast proton transfer, and its proton conductivity can reach 1.33 × 10–2 S cm–1 at ambient conditions (30 °C, 70% relative humidity (RH)), which is the highest value among the MOF-based proton conductors operated in an ambient environment. Therefore, it has the potential of becoming a room-temperature proton conductor without a humidifier. Importantly, the composite material is further fabricated into a composite membrane for proton-exchange membrane fuel cells (PEMFCs), which can deliver a power density of 0.93 mW cm–2 at 30 °C and 98% RH. This result can lay a fundamental basis for the application of MOF-based proton conductors in the area of electrochemical energy conversion.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Polyoxometalates: Synthesis and Applications · Covalent Organic Framework Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China

Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen 518055, China

School of Chemistry, South China Normal University, Guangzhou 510006, China

Funding

Shenzhen Fundamental Research Program · Natural Science Foundation of Guangdong Province · Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology

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