Abstract
Metal-sulfur batteries (MSBs) are considered up-and-coming future-generation energy storage systems because of their prominent theoretical energy density. However, the practical applications of MSBs are still hampered by several critical challenges, i.e., the shuttle effects, sluggish redox kinetics, and low conductivity of sulfur species. Recently, benefiting from the high surface area, regulated networks, molecular/atomic-level reactive sites, the metal-organic frameworks (MOFs)-derived nanostructures have emerged as efficient and durable multifaceted electrodes in MSBs. Herein, a timely review is presented on recent advancements in designing MOF-derived electrodes, including fabricating strategies, composition management, topography control, and electrochemical performance assessment. Particularly, the inherent charge transfer, intrinsic polysulfide immobilization, and catalytic conversion on designing and engineering of MOF nanostructures for efficient MSBs are systematically discussed. In the end, the essence of how MOFs' nanostructures influence their electrochemical properties in MSBs and conclude the future tendencies regarding the construction of MOF-derived electrodes in MSBs is exposed. It is believed that this progress review will provide significant experimental/theoretical guidance in designing and understanding the MOF-derived nanostructures as multifaceted electrodes, thus offering promising orientations for the future development of fast-kinetic and robust MSBs in broad energy fields.
Highlights
The practical application of Metal-sulfur batteries (MSBs) is still hampered by several critical challenges: i) the soluble
The accelerated increase of the global energy requirements has polysulfides migrating to anodes, ii) the low conductivity of created the urgency to develop reproducible energy sources sulfur species, and iii) the sluggish sulfur redox kinetics, all of
metal-organic frameworks (MOFs) as porous multifunctional materials engineered with inorganic metal sites and organic linkers have been widely studied in diverse battery systems in the past few years
Summary
Rechargeable MSBs have attracted extensive concerns mainly because of theoretical high energy density, high abundance of elements, and low cost. LSB arises an overwhelming theoretic gravimetric energy density (2600 Wh kg−1), which is five times as high as that of well-used lithium-ion batteries (Scheme 1).[9,10,11] Generally, LSBs present a multiple-electron transfer procedure (S8 → Li2S8/Li2S6 → Li2S4 → Li2S2/Li2S), which results in high theoretic capacitance of sulfur.[12,13] these multistep reactions bring problems and challenges, which seriously encumbered their commercialization process: i) the poor sulfur utilization due to the insulation nature of sulfur species; ii) the solubility of polysulfide molecules generating an internal “shuttle” behavior, leading to reduced coulombic efficiency and fast capacity decline; iii) the redox kinetics being more depressed owing to the rareness of active surfaces and insulation of sulfur cathode, resulting in low sulfur utilization and inferior charge efficiency; iv) the enormous volume change (80%) during cycling. As a new family of porous materials, MOFs constructed by coordinating metal ions/clusters with organic likers exhibit high crystallinity and ordered array Considering their fascinating features of high porosity, large specific surface area, tunable topological structures, and adjustable chemical ingredients, MOF and MOF-derived nanostructures have been demonstrated. We discussed the inherent charge transfer, intrinsic polysulfide immobilization, and catalytic conversion on designing and engineering of MOF nanostructures for efficient MSBs in depth
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
