Anion-Regulated Solvation Structure and Electrode Interface toward Rechargeable Magnesium Batteries

IF 9.6 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2025-03-13 DOI:10.1021/acs.nanolett.4c06433
Duo Zhang, Miao Zhou, Eslam Sheha, Jiulin Wang, Jun Yang, Yanna NuLi
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Abstract

Developing chlorine-free electrolytes enabling fast Mg2+ transport through a solid/cathode-electrolyte interphase (SEI/CEI) remains critical for rechargeable magnesium batteries (RMBs). However, single-anion electrolytes often lack the necessary redox properties for this requirement. Here, we propose a dual-anion electrolyte combining magnesium bis(trifluoromethanesulfonyl)imide and 1-butyl-1-methylpiperidinium trifluoromethylsulfonate (PP14CF3SO3) in diglyme and 2-methoxyethylamine (MOEA) solvent, achieving efficient Mg plating/stripping, cathode compatibility, and high anodic stability. The electrostatic interactions between MOEA and Mg2+/CF3SO3 stabilize the Mg-anode SEI while fostering CxNy-rich CEI formation. This leads to a significantly improved performance in Mg∥Mg and stainless steel (SS)∥Mg cells, with an extended lifespan over 2500 h and average Coulombic efficiency of 98.1%, respectively. Mo6S8∥Mg full cells exhibit excellent rate performance, while poly(6,6′,6″-(benzene-1,3,5-triyl)tris(9,10-anthracenedione)) (PBAQ)∥Mg cells operate at 2.8 V (1 A g–1) with ∼70% capacity retention after 200 cycles. The work highlights anion-mediated solvation regulation, providing insights into advanced electrolyte engineering in high-performance RMBs.

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Nano Letters
Nano Letters 工程技术-材料科学:综合
CiteScore
16.80
自引率
2.80%
发文量
1182
审稿时长
1.4 months
期刊介绍: Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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Anion-Regulated Solvation Structure and Electrode Interface toward Rechargeable Magnesium Batteries Tailoring Phonon Polaritons with a Single-Layer Photonics-Empowered Polaritonic Crystal Modulated-Illumination Intermittent-Contact Tip-Enhanced Raman Spectroscopy Issue Publication Information Issue Editorial Masthead
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