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Synergistic Coupling of Sulfide Electrolyte and Integrated 3D fes2 Electrode Toward Long-Cycling All-Solid-State Lithium Batteries

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Energy & Environmental Materials 2024年第5期7卷 72-80页

作者： Wenyi Liu Yongzhi Zhao Chengjun Yi Weifei Hu Jiale Xia Yuanyuan Li Jinping Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology School of Integrated Circuits Huazhong University of Science and Technology

fes2cathode is promising for all-solid-state lithium batteries due to its ultra-high capacity, low cost, and environmental friendliness. However, the poor performances, induced by limited electrode-electrolyte interface, severe volume expansion, and polysulfide shuttle, hinder the application of fes2in all-solidstate lithium batteries. Herein, an integrated 3D fes2electrode with full infiltration of Li6PS5Cl sulfide electrolytes is designed to address these *** a 3D integrated design not only achieves intimate and maximized interfacial contact between electrode and sulfide electrolytes, but also effectively buffers the inner volume change of fes2and completely eliminates the polysulfide shuttle through direct solid–solid conversion of Li2S/S. Besides, the vertical 3D arrays guarantee direct electron transport channels and horizontally shortened ion diffusion paths, endowing the integrated electrode with a remarkably reduced interfacial impedance and enhanced reaction *** from these synergies, the integrated all-solid-state lithium battery exhibits the largest reversible capacity (667mAh g-1), best rate performance,and highest capacity retention of 82%over 500 cycles at 0.1 C compared to both a liquid battery and non-integrated all-solid-state lithium battery. The cycling performance is among the best reported for fes2-based all-solid-state lithium batteries. This work presents an innovative synergistic strategy for designing long-cycling high-energy all-solid-state lithium batteries, which can be readily applied to other battery systems, such as lithium-sulfur batteries.

关键词： 3D electrolyte infiltration all-solid-state batteries fes2 nanosheets arrays integrated 3D electrodes sulfide electrolytes

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