MOF 和其他晶体平台的超质子电导率超过 10−1 S cm−1,Advanced Functional Materials

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MOF 和其他晶体平台的超质子电导率超过 10−1 S cm−1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-05-28 , DOI: 10.1002/adfm.202101584
Shyam Chand Pal ₁ , Madhab C. Das ₁

Affiliation

质子交换膜 (PEM) 是质子交换膜燃料电池 (PEMFC) 的基本模块，允许质子通过，从而控制 PEMFC 的整体性能。迄今为止，Nafion 已成为广泛使用的可销售 PEM 材料，因为它具有 10 ^-2 –10 ^-1 S cm ^{-1 的}高质子传导率在高相对湿度和 80–85 °C 下。另一方面，结晶材料如金属有机骨架（MOFs）、配位聚合物（CPs）、共价有机骨架（COFs）、氢键有机骨架（HOFs）、金属氢键有机骨架（MHOFs）和多金属氧酸盐 (POM) 正在成为潜在的 PEM 材料，其结晶度为研究传导途径和相关机制以了解结构 - 功能关系铺平了道路。然而，迄今为止，接近Nafion的10 ^-1 S cm ^-1水平的超高超质子电导率对于晶体质子导体来说相对稀缺。在这篇综述中，讨论的重点是电导率等级为 10 ^-1 S cm 的材料^-1和更高的单个晶体平台（分别与 nafion 处于同等地位并优于 nafion）基于其合成方法，同时突出了实现这种超高电导率的设计规范和关键特征。在进行批判性分析的同时，还讨论了关键问题和未来前景。

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Superprotonic Conductivity of MOFs and Other Crystalline Platforms Beyond 10−1 S cm−1

The proton-exchange membrane (PEM) is a fundamental module of proton-exchange membrane fuel cells (PEMFCs), permitting proton passage and thus governing the overall performance of PEMFCs. Till now, Nafion has been the extensively used marketable PEM material due to its high protonic conductivity of 10⁻²–10⁻¹ S cm⁻¹ under high relative humidity and 80–85 °C. On the other hand, crystalline materials such as metal-organic frameworks (MOFs), coordination polymers (CPs), covalent organic frameworks (COFs), hydrogen-bonded organic framework (HOFs), metalo hydrogen-bonded organic framework (MHOFs), and polyoxometalates (POMs) are emerging as potential PEM materials, where crystallinity has paved the way to study the conduction pathway and associated mechanisms to understand structure-function relationships. However, to date, ultrahigh superprotonic conductivity to the level of 10⁻¹ S cm⁻¹, close to Nafion, is relatively scarce for the crystalline proton conductors. In this review, the discussion is focused on materials that demonstrate a conductivity order of 10⁻¹ S cm⁻¹ and higher for those individual crystalline platforms (to be on the equal footing and superior to nafion, respectively) based on their synthesis approach while highlighting the design norms and key features for attaining such ultrahigh conductivity. While a critical analysis is made, the key issues and future prospects are also addressed.

更新日期：2021-08-05

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