# A Review of Lithium-Sulfur Batteries Based on Metal-Organic Frameworks: Progress and Prospects
## 4 Conclusions and Outlook  
This article delves into the versatile applications of MOFs in LSBs, encompassing crucial components like anode carriers, separators, and electrolytes. A comparison of the performance of MOF in lithium-sulfur batteries is summarized in Table 1. It offers in-depth insights into how MOFs function within different parts of LSBs and analyzes the pivotal factors influencing their performance, such as their capacity to adsorb polysulfides and their role in promoting uniform ion deposition. Despite the substantial advancements in the application of MOFs in the LSBs field over the past decade, practical implementation and commercialization still pose challenges, and several core mechanisms remain inadequately explored. The key factors and potential avenues for development are outlined as follows. 1. When assessing the impact of MOFs on the performance of LSBs, a comprehensive analysis of the pore structure of MOFs is essential. While most studies have emphasized the role of pore size in mitigating the polysulfide shuttle effect, they often overlook the broader implications of pore size on the uniform distribution of sulfur and the sulfur loading capacity within MOFs. Notably, achieving uniform sulfur loading and increasing sulfur content remain significant challenges for many MOFs. Therefore, these factors must be comprehensively considered during the screening and design of MOFs with optimal pore sizes. 2. Applying a uniform and comprehensive MOF coating onto the separator can significantly enhance the interfacial stability and cycling performance of the battery. This coating serves as an effective physical barrier to minimize the polysulfide shuttle effect, while simultaneously providing chemical adsorption sites to improve polysulfide immobilization. Current modification methods, such as vacuum filtration and in situ modification, fall short in meeting this requirement. Therefore, innovative techniques must be adopted for depositing MOF coatings. Promising approaches include chemical vapor deposition, magnetron sputtering, and atomic layer deposition. 3. The development of novel redox-active MOFs presents a promising avenue, as these materials not only possess ultra-high specific surface areas and substantial porosity but also offer customizable host-guest interaction platforms. Among these, MOFs \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Initial Discharge** & \multicolumn{2}{c}{**Terminal Discharge**} & & **Loading** & \\
**Composites** & \begin{tabular}{c} **Capacity** \\ **(mAh g\({}^{-1}\))** \\ **(Current Density)** \\ \end{tabular} & \begin{tabular}{c} **Capacity** \\ **(mAh g\({}^{-1}\))** \\ **(Cycle Number)** \\ \end{tabular} & \
\begin{tabular}{c} **Retention Rate** \\ **Sulfur** \\ \end{tabular} &
\begin{tabular}{c} **Amount of** \\ **Sulfur** \\ \end{tabular} & **Reference** \\ \hline S\#FMNCN-800 & 1645 (0.1 C) & 1220 (200) & 74.16\% & 26.0\% & [44] \\ S\#FMNCN-900 & 1588 (0.1 C) & 1024 (200) & 64.49\% & 44.6\% & [44] \\ S\#FMNCN-1000 & 1477 (0.1 C) & 669 (200) & 45.3\% & 40.3\% & [44] \\ \hline In-IPA@rGO/S & 1672.3 (0.2 C) & 898.7 (100) & 53.74\% & 25\% & [49] \\ In-IPA/S & 1099.4 (0.2 C) & 296.7 (100) & 26.99\% & / & [49] \\ \hline CoMoS3.13@NCNTs & 960 (0.5 C) & 586 (1000) & 61.04\% & 72\% & [55] \\ CoMoS3.13 & 888 (0.5 C) & 296 (1000) & 33.33\% & / & [55] \\ \hline S/NiCo-PCNF & 1431.7 (0.2 C) & 628.5 (500) & 43.9\% & 53.5\% & [67] \\ S/Ni-PCNF & 1043.2 (0.2 C) & / & / & / & [67] \\ S/Co-PCNF & 988.7 (0.2 C) & / & / & / & [67] \\ S/PCNF & 836.7 (0.2 C) & / & / & / & [67] \\ \hline Fe-ZIF-8/PP & 865 (0.5 C) & 409 (1000) & 47.28\% & / & [77] \\ ZIF-8/PP & 683 (0.5 C) & 249 (1000) & 36.46\% & / & [77] \\ PP & 466 (0.5 C) & 167 (1000) & 35.84\% & / & [77] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of MOF performance in batteries. based on tetravalent metals and carboxylic acid ligands have garnered particular attention due to their exceptional chemical stability.