Journal
CHEMICAL SOCIETY REVIEWS
Volume 50, Issue 11, Pages 6349-6368Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cs00004g
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Funding
- ACCEL program, Japan Science and Technology Agency (JST) [JPMJAC1501, 20H05623]
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2020R1G1A1101060]
- National Research Foundation of Korea [2020R1G1A1101060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The article focuses on rational design strategies for highly proton-conductive MOFs in recent years, discussing the challenges and future directions for the design of proton-conductive MOFs, such as improving mobile proton concentration through pre-design strategies or post-synthetic modifications.
Since the transition of energy platforms, proton-conducting materials have played a significant role in broad applications for electrochemical devices. In particular, solid-state proton conductors (SSPCs) are emerging as the electrolyte in fuel cells (FC), a promising power generation technology, because of their high performance and safety for operating in a wide range of temperatures. In recent years, proton-conductive porous metal-organic frameworks (MOFs) exhibiting high proton-conducting properties (>10(-2) S cm(-1)) have been extensively investigated due to their potential application in solid-state electrolytes. Their structural designability, crystallinity, and porosity are beneficial to fabricate a new type of proton conductor, providing a comprehensive conduction mechanism. For the proton-conductive MOFs, each component, such as the metal centres, organic linkers, and pore space, is manipulated by a judicious predesign strategy or post-synthetic modification to improve the mobile proton concentration with an efficient conducting pathway. In this review, we highlight rational design strategies for highly proton-conductive MOFs in terms of MOF components, with representative examples from recent years. Subsequently, we discuss the challenges and future directions for the design of proton-conductive MOFs.
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