An electrolyte additive for realizing stable lithium metal batteries by constructing robust interphase with high mechanical strength and high ionic conductivity

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-03-24 DOI:10.1016/j.matlet.2025.138455

Jinpen Niu, Yanan Li, Yuzhi Chen, Yuxin Ouyang, Bo Wen, Xinyu Da, Wei Yu

引用次数: 0

Abstract

Constructing a stable solid electrolyte interphase (SEI) can effectively enhance the cycling stability of lithium metal batteries (LMBs). In this study, we developed a NaF-doped SEI using sodium bis(trifluoromethylsulfonyl)imide (NaTFSI) as an electrolyte additive. The high Young’s modulus of NaF strengthens the mechanical strength of the SEI, effectively inhibiting the growth of lithium dendrites. Meanwhile, this SEI features abundant grain boundaries and superior interfacial properties, significantly improving Li⁺ transport. Consequently, the Li||NCM811 cells with 3 wt% NaTFSI demonstrate outstanding long-term cycling performance and capacity retention (500 cycles, retention: 82.43 %). These results indicate that NaTFSI holds significant potential for enhancing next-generation LMBs.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive