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Title: Flexible, solid-state, ion-conducting membrane with 3D garnet nanofiber networks for lithium batteries

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium’s highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (~3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to our knowledge, a 3D lithium-ion–conducting ceramic network based on garnet-type Li6.4La3Zr2Al0.2O12(LLZO) lithium-ion conductor to provide continuous Li+transfer channels in a polyethylene oxide (PEO)-based composite. This composite structure further provides structural reinforcement to enhance the mechanical properties of the polymer matrix. The flexible solid-state electrolyte composite membrane exhibited an ionic conductivity of 2.5 × 10-4 S/cm at room temperature. The membrane can effectively block dendrites in a symmetric Li | electrolyte | Li cell during repeated lithium stripping/plating at room temperature, with a current density of 0.2 mA/cm2 for around 500 h and a current density of 0.5 mA/cm2 for over 300 h. Finally, these results provide an all solid ion-conducting membrane that can be applied to flexible LIBs and other electrochemical energy storage systems, such as lithium–sulfur batteries.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007807
OSTI ID:
1608918
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 113, Issue 26; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 702 works
Citation information provided by
Web of Science

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Recent Advancements in Polymer-Based Composite Electrolytes for Rechargeable Lithium Batteries journal May 2018
Recent Progress in All-Solid-State Lithium−Sulfur Batteries Using High Li-Ion Conductive Solid Electrolytes journal February 2019
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Morphosynthesis of 3D Macroporous Garnet Frameworks and Perfusion of Polymer‐Stabilized Lithium Salts for Flexible Solid‐State Hybrid Electrolytes journal April 2019
Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers journal July 2018
g-C 3 N 4 nanosheets enhanced solid polymer electrolytes with excellent electrochemical performance, mechanical properties, and thermal stability journal January 2019
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Self-smoothing anode for achieving high-energy lithium metal batteries under realistic conditions journal April 2019
A hybrid solid electrolyte Li 0.33 La 0.557 TiO 3 /poly(acylonitrile) membrane infiltrated with a succinonitrile-based electrolyte for solid state lithium-ion batteries journal January 2020
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Interfacial Incompatibility and Internal Stresses in All‐Solid‐State Lithium Ion Batteries journal August 2019
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