Synergistic Coupling of Sulfide Electrolyte and Integrated 3D FeS2 Electrode Toward Long-Cycling All-Solid-State Lithium Batteries

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外文摘要：FeS2 cathode 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 FeS2 in all-solid-state lithium batteries.Herein,an integrated 3D FeS2 electrode with full infiltration of Li6PS5Cl sulfide electrolytes is designed to address these challenges.Such 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 FeS2 and 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 kinetics.Benefiting from these synergies,the integrated all-solid-state lithium battery exhibits the largest reversible capacity(667 mAh 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.

外文关键词：

3D electrolyte infiltrationall-solid-state batteriesFeS2 nanosheets arraysintegrated 3D electrodessulfide electrolytes

作者：

Wenyi Liu、Yongzhi Zhao、Chengjun Yi、Weifei Hu、Jiale Xia、Yuanyuan Li、Jinping Liu

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作者单位：

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

School of Chemistry,Chemical Engineering and Life Science,Wuhan University of Technology,Wuhan 430070,China

School of Integrated Circuits,Huazhong University of Science and Technology,Wuhan 430074,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYanchang Petroleum-WHUT Joint ProgramState Key Laboratory of Advanced Technology for Materials Synthesis and Processing(Wuhan University of Technology)Fundamental Research Funds for the Central Universities

项目编号：

5227220152072136521722295230230351972257ycwhlg-2022ky-052022-KF-2020231VA106

出版年：

2024

DOI：

10.1002/eem2.12719

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(5)