DataVXAdvanced Functional MaterialsPaper
journal article·2025-10Open access

Accelerated Kinetics of Desolvation and Redox Transformation Enabled by MOF Sieving for High‐Loading Mg‐S Battery

Qinghua Guan, Quan Zhuang, Wenlong Xu, Yongzheng Zhang, Shuang Cheng, Jing Zhang, Meinan Liu, Hongzhen Lin, Jian Wang

Advanced Functional Materials· Volume 35· Issue 40
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Abstract

Abstract Magnesium‐sulfur (Mg‐S) batteries have attracted growing interest as a promising candidate of post‐lithium‐ion battery systems due to their high energy density, natural abundance of Mg and S, and superior safety. However, they are severely inhibited by the sluggish electrochemical kinetics of interfacial Mg2+ desolvation and successive sulfur redox species conversions, leading to dissatisfactory “shuttling effect”. Herein, a strategy of combining porous sieve desolvation and molecular electrocatalysis is proposed to dissociate Mg2+‐solvents structure, stimulate free Mg2+ diffusion, and further improve the kinetics of sulfur redox conversion. As a protocol, the metal‐organic frameworks (MOF) of representative MIL‐101(Cr) with pore structure is capable of sieving larger Mg(solvents)x2+ cluster to release free Mg2+ to react with sulfur species, and also the Lewis acid site of central Cr(III) can effectively adsorb and transform polysulfides, as thoroughly revealed by experimental and in situ/ex situ characterizations. Consequently, the as‐fabricated Mg‐S batteries employed with MIL‐101(Cr)‐decorated separator can deliver the capacity of 974 mA h g−1 after 250 cycles, and exhibit a high‐rate performance of 694 mA h g−1 at 2 C. Impressively, the high‐mass‐loading cell of 6.4 mg cm−2 stabilizes for more than 60 cycles, demonstrating the polar MOF with pore sieving effect for practical application of Mg‐S batteries.
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Research context

Energy storageCatalysis & surfaces

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Nano‐Tech and Nano‐Bionics University of Science and Technology of China Hefei 230026 China

i‐Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 China

Inner Mongolia Key Laboratory of Carbon Nanomaterials Nano Innovation Institute (NII) College of Chemistry and Materials Science Inner Mongolia Minzu University Tongliao 028000 China

Inszitute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences Nanjing 210014 China

State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China

School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 China

State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non‐Ferrous Metals and Featured Materials School of Resources Environment and Materials Guangxi University Nanning 530004 China

Helmholtz Institute Ulm (HIU) D89081 Ulm Germany

Karlsruhe Institute of Technology (KIT) D76021 Karlsruhe Germany

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · Alexander von Humboldt-Stiftung

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