Enhancing Zinc-Ion-Transport Kinetics in Solid-State Zinc Batteries via an Internal/Surface Dual Acceleration Strategy

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-02 DOI:10.1021/acs.nanolett.5c01076

Guobing Sun, Ziyang Cui, Danyang Zhao, Zhixuan Jiao, Ling Li, Zezhan Zhang, Wenming Zhang, Qiancheng Zhu

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Abstract

Solid polymer electrolytes (SPEs) hold substantial potential for enabling highly flexible and stable zinc-ion batteries (ZIBs) due to their nearly anhydrous nature. However, the development of SPEs is still hindered by their poor zinc-ion-transport kinetics. Herein, utilizing CALF-20 as both a filler and a functional coating, a bilayer solid-state electrolyte (BSSE) was designed. On the one hand, the intermediate CALF-20 filled poly(ethylene oxide) hybrid gel demonstrates strong interaction with CF₃SO₃^– anions, thus promoting Zn²⁺ dissociation and transmission. On the other hand, the outer single CALF-20 layer supports Zn²⁺ ions with abundant transmission paths and a low Zn²⁺ migration energy barrier, which doubly accelerates ion migration at the interface. This internal/surface dual acceleration strategy allows the BSSE to deliver high ionic conductivity and Zn²⁺ transference number. Both the Zn∥Zn symmetric and Zn∥MnO₂ full cells exhibit an obvious prolonged cycle life. This dual acceleration strategy sheds light on the design of high-ionic-conductivity, steady, and practical ZIBs.

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通过内/表面双加速策略增强固态锌电池中的锌离子传输动力学

固体聚合物电解质（spe）由于其几乎无水的性质，在实现高柔性和稳定的锌离子电池（zbs）方面具有巨大的潜力。然而，SPEs的发展仍然受到其锌离子传输动力学差的阻碍。本文利用CALF-20作为填料和功能涂层，设计了一种双层固态电解质（BSSE）。一方面，中间体CALF-20填充的聚环氧乙烷杂化凝胶与CF3SO3 -阴离子表现出较强的相互作用，促进了Zn2+的解离和传递。另一方面，外单CALF-20层支持Zn2+离子，具有丰富的传输路径和较低的Zn2+迁移能垒，双重加速了离子在界面的迁移。这种内部/表面双重加速策略允许BSSE提供高离子电导率和Zn2+转移数。锌对称型和锌满型MnO2电池的循环寿命均明显延长。这种双加速策略有助于设计高离子电导率、稳定和实用的zbs。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.