## 2 MOFs for Fuel-Cell Applications
### MOFs as Electrolyte Application
\begin{table}
\begin{tabular}{c c c c} \hline
**Filler** & **Polymer Backbone** & **Proton Conductivity (S cm\({}^{-1}\))** & **Conditions** \\ \hline Cr-MIL-101-NH\({}_{2}\)[98] & SPES & \(4.1\times 10^{-2}\) & 160 \({}^{\circ}\)C \\ \hline UiO-66 [99] & Nafion & \(1.65\times 10^{-1}\) & 80 \({}^{\circ}\)C, 95\% RH \\ \hline UiO-66-SO\({}_{3}\)H [99] & Nafion & \(1.71\times 10^{-1}\) & 80 \({}^{\circ}\)C, 95\% RH \\ \hline UiO-66-NH\({}_{2}\) [100] & Nafion & \(1.84\times 10^{-1}\) & 80 \({}^{\circ}\)C, 95\% RH \\ \hline UiO-66-NH\({}_{2}\) + UiO-66-SO\({}_{3}\)H [100] & Nafion & \(2.56\times 10^{-1}\) & 90 \({}^{\circ}\)C, 95\% RH \\ \hline UiO-66-NH\({}_{2}\) + UiO-66-SO\({}_{3}\)H [101] & Chitosan & \(5.2\times 10^{-2}\) & 100 \({}^{\circ}\)C, 95\% RH \\ \hline GO@UO-66-SO\({}_{3}\)H [102] & SPEEK & \(2.68\times 10^{-1}\) & 70 \({}^{\circ}\)C, 95\% RH \\ \hline GO@UiO-66-NH\({}_{2}\) [94] & Nafion & \(3.03\times 10^{-1}\) & 90 \({}^{\circ}\)C, 95\% RH \\ \hline PWA@UiO-66-NH\({}_{2}\) [103] & Nafion & \(9.2\times 10^{-2}\) & Ambient condition \\ \hline MIL-101 [104] & Chitosan & \(3.4\times 10^{-2}\) & 100 \({}^{\circ}\)C, 100\% RH \\ \hline S-MIL-101 [104] & Chitosan & \(6.4\times 10^{-2}\) & 100 \({}^{\circ}\)C, 100\% RH \\ \hline H\({}_{2}\)SO\({}_{4}\)@MIL-101 [104] & Chitosan & \(9.5\times 10^{-2}\) & 100 \({}^{\circ}\)C, 100\% RH \\ \hline H\({}_{3}\)PO\({}_{4}\)@MIL-101 [104] & Chitosan & \(8.3\times 10^{-2}\) & 100 \({}^{\circ}\)C, 100\% RH \\ \hline CF\({}_{3}\)SO\({}_{3}\)H@MIL-101 [104] & Chitosan & \(9.4\times 10^{-2}\) & 100 \({}^{\circ}\)C, 100\% RH \\ \hline H\({}_{3}\)PO\({}_{4}\)/ZIF-8 [105] & PBI & \(3.1\times 10^{-3}\) & 180 \({}^{\circ}\)C, anhydrous \\ \hline H\({}_{3}\)PO\({}_{4}\)/ZIF-67 [105] & PBI & \(4.2\times 10^{-2}\) & 180 \({}^{\circ}\)C, anhydrous \\ \hline H\({}_{3}\)PO\({}_{4}\)/ZIF-mix [105] & PBI & \(9.2\times 10^{-2}\) & 180 \({}^{\circ}\)C, anhydrous \\ \hline ZIF-8 [106] & SPEEK & \(1.6\times 10^{-2}\) & 100 \({}^{\circ}\)C \\ \hline ZIF-67 [106] & SPEEK & \(1.5\times 10^{-2}\) & 100 \({}^{\circ}\)C \\ \hline ZIF-mix [106] & SPEEK & \(2.9\times 10^{-2}\) & 100 \({}^{\circ}\)C \\ \hline SO\({}_{3}\)H-MIL-100(Fe) [107] & SPS & \(3.82\times 10^{-3}\) & 25 \({}^{\circ}\)C, 100\% RH \\ \hline Polydopamine-ZIF-8 [108] & Nafion & \(2.5\times 10^{-1}\) & 80 \({}^{\circ}\)C, 95\% RH \\ \hline polyacrylate carboxyl-ZIF-8 [109] & Nafion & \(2.4\times 10^{-1}\) & 25 \({}^{\circ}\)C, 100\% RH \\ \hline Phytic@MIL101 [110] & Sulfonated poly (arylene ether & 0.192 & 80 \({}^{\circ}\)C, 100\% RH \\  & ketone) & 0.192 & 80 \({}^{\circ}\)C, 100\% RH \\ \hline MOF-1 [89] & Aquivion & \(3.49\times 10^{-2}\) & 25 \({}^{\circ}\)C, 100\% RH \\ \hline Co-tri MOF [111] & Aquivion & \(5.06\times 10^{-2}\) & 25 \({}^{\circ}\)C, 100\% RH \\ \hline SO\({}_{3}\)H-MIL101 [112] & SPEEK & \(3.406\times 10^{-1}\) & 75 \({}^{\circ}\)C, 100\% RH \\ \hline HPW-MIL-101(Cr) [113] & SPEEK & \(2.72\times 10^{-1}\) & 65 \({}^{\circ}\)C, 100\% RH \\ \hline Cu–TMA [114] & SPEEK & \(4.5\times 10^{-2}\) & 70 \({}^{\circ}\)C, 98\% RH \\ \hline MOF-801 [115] & C-SPAEKS & \(1.0\times 10^{-1}\) & 90 \({}^{\circ}\)C, 100\% RH \\ \hline MIL-100(Fe) [116] & C-SPAEKS & \(1.38\times 10^{-1}\) & 100 \({}^{\circ}\)C, 98\% RH \\ \hline Im@MOF-801 [117] & C-SPAEKS & \(1.28\times 10^{-1}\) & 90 \({}^{\circ}\)C, 100\% RH \\ \hline MOF-5(SiO\({}_{2}\)) [118] & SPEEK & \(3.69\times 10^{-3}\) & 20 \({}^{\circ}\)C \\ \hline MOF-Z1 [119] & SPEEK & \(3.95\times 10^{-3}\) & 80 \({}^{\circ}\)C, 98\% RH \\ \hline MOF-Z2 [119] & SPEEK & \(3.17\times 10^{-3}\) & 80 \({}^{\circ}\)C, 98\% RH \\ \hline ZIF-L [120] & SPEEK & \(1.83\times 10^{-1}\) & 70 \({}^{\circ}\)C, 90\% RH \\ \hline SO\({}_{4}\)-MOF-808 [121] & SPEEK & \(1.96\times 10^{-1}\) & 70 \({}^{\circ}\)C, 90\% RH \\ \hline Fe-MIL-101-NH\({}_{2}\) [122] & SPPO & \(2.5\times 10^{-2}\) & 90 \({}^{\circ}\)C, 98\% RH \\ \hline NAPI-Fe-MIL-101-NH\({}_{2}\) [123] & SPPO & \(4\times 10^{-2}\) & 160 \({}^{\circ}\)C, 15\% RH \\ \hline Cd-MOF [124] & SPPO & \(2.64\times 10^{-2}\) & 70 \({}^{\circ}\)C, 98\% RH \\ \hline MOF-azo [125] & Nafion & \(1.12\times 10^{-2}\) & Ambient conditions \\ \hline \end{tabular}
\end{table}