首页|Boosting the cycling stability of all-solid-state lithium metal batteries through MOF-based polymeric protective layers

Boosting the cycling stability of all-solid-state lithium metal batteries through MOF-based polymeric protective layers

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Solid-state electrolytes(SSEs)play a pivotal role in advancing next-generation lithium metal battery technology.However,they commonly encounter substantial interfacial resistance and poor stability when interfacing with lithium metal,hindering practical applications.Herein,we introduce a flexible metal-organic framework(MOF:NUS-6)-incorporated polymeric layer,denoted as NP,designed to pro-tect the sodium superionic conductor(NASICON)-type Li1.3Alo.3Ti1.7(PO4)3(LATP)electrolyte from Li metal anodes.The NP matrix establishes a soft interface with the LATP surface,effectively reducing voids and gaps that may arise between the LATP electrolyte and Li metal.Moreover,the MOF component in NP enhances ionic conductivity,offers abundant Li+transport sites,and provides hierarchical ion channels,ensuring a homogeneous Li+flow and thus effectively inhibiting Li dendrite formation.Utilizing NP,we fabricate Li symmetrical cells cycled for over 1600 h at 0.2 mA cm-2 and all-solid-state Li|NP-LATP|LiFePO4 batteries,achieving a remarkable 99.3％capacity retention after 200 cycles at 0.2 C.This work outlines a general strategy for designing long-lasting and stable solid-state Li metal batteries.

All-solid-state Li metal batteryMOF-based polymeric layerLi dendriteInterfacial contactLATP electrolyte stability

Hongfei Bao、Diancheng Chen、Jiaqi Cao、Pengfeng Jiang、Kaili Li、Runtao Liu、Yuling Zhao、Yichun Zheng、Beiqi Liao、Yarning Zhang、Xia Lu、Yang Sun

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School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,Guangdong,China

National Key R&D Program of ChinaNatural Science Foundation of ChinaGuangdong Innovative and Entrepreneurial Research Team ProgramFundamental Research Funds for the Central Universities,Sun Yatsen University

2022YFB2404700221091862021ZT09L22722hytd01

2024

10.1016/j.jechem.2024.03.061

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.95(8)