Designing Polysulfide‐Resistant Solid Electrolyte Interphase for Long‐Cycling Lithium–Sulfur Batteries
Source abstract
Abstract
ABSTRACT Lithium–sulfur (Li–S) batteries are promising next‐generation energy storage systems due to their ultrahigh theoretical energy density. However, their practical application is critically hindered by severe lithium polysulfide (LiPS) corrosion at the Li metal anode, resulting in irreversible Li consumption and rapid cell failure. Herein, a lithium fluoride (LiF)‐rich solid electrolyte interphase (SEI) is rationally designed and systematically validated to resist aggressive LiPS corrosion and to enable long‐cycle Li–S batteries. Model SEI with LiF reduces the LiPS shuttle current by over 50% and increases the average Coulombic efficiency from 95.6% to 98.0% compared with the SEI without LiF. Building on this mechanistic insight, a robust LiF‐rich SEI is prepared via a simple and scalable immersion method. As a result, the cycling lifespan of Li–S coin cells is extended from 54 to 105 cycles, and 3 Ah‐level pouch cells exhibit a 28% improvement in cycling lifespan. Furthermore, a 9 Ah‐level pouch cell achieves an actual energy density of 493 Wh kg −1 and maintains stable operation for 28 cycles. This work elucidates the critical protective role of LiF in mitigating LiPS corrosion and provides a viable pathway toward long‐cycling Li–S batteries.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Fiber-reinforced polymer composites · Advancements in Battery Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering Beijing Institute of Technology Beijing People's Republic of China
School of Interdisciplinary Science Beijing Institute of Technology Beijing People's Republic of China
Beijing Key Laboratory of Complex Solid State Batteries, Department of Chemical Engineering Tsinghua University Beijing People's Republic of China
Shanxi Research Institute for Clean Energy Tsinghua University Taiyuan People's Republic of China
Shenyang National Laboratory for Materials Science, Institute of Metal Research Chinese Academy of Sciences Shenyang People's Republic of China
School of Chemical Engineering Sungkyunkwan University (SKKU) Jangan‐Gu Suwon Republic of Korea
Centre for Clean Energy Technology, School of Mathematical and Physical Science, Faculty of Science University of Technology Sydney Sydney Australia
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
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