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Title: Ultrathin, flexible, solid polymer composite electrolyte enabled with aligned nanoporous host for lithium batteries

Journal Article · · Nature Nanotechnology

The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid electrolyte-based cells, ultrathin and lightweight solid electrolytes with high ionic conductivity are desired. However, solid electrolytes with comparable thicknesses to commercial polymer electrolyte separators (~10 μm) used in liquid electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. In this work, we report on a polymer–polymer solid-state electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10-4 S cm-1 at 30 °C) of the infused polymer electrolyte. Lastly, all-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-76SF00515; EE0007803
OSTI ID:
1546972
Journal Information:
Nature Nanotechnology, Vol. 14, Issue 7; ISSN 1748-3387
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 549 works
Citation information provided by
Web of Science

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Cited By (15)

Perpendicular MXene Arrays with Periodic Interspaces toward Dendrite‐Free Lithium Metal Anodes with High‐Rate Capabilities journal November 2019
Nacre‐Inspired Composite Electrolytes for Load‐Bearing Solid‐State Lithium‐Metal Batteries journal November 2019
Plating/Stripping Behavior of Actual Lithium Metal Anode journal October 2019
Ultrathin, Flexible Polymer Electrolyte for Cost‐Effective Fabrication of All‐Solid‐State Lithium Metal Batteries journal November 2019
MXene‐Based Mesoporous Nanosheets Toward Superior Lithium Ion Conductors journal January 2020
Revealing an Interconnected Interfacial Layer in Solid‐State Polymer Sodium Batteries journal November 2019
A Sodiophilic Interphase‐Mediated, Dendrite‐Free Anode with Ultrahigh Specific Capacity for Sodium‐Metal Batteries journal November 2019
Enhanced Surface Interactions Enable Fast Li + Conduction in Oxide/Polymer Composite Electrolyte journal January 2020
Revealing an Interconnected Interfacial Layer in Solid‐State Polymer Sodium Batteries journal November 2019
A Sodiophilic Interphase‐Mediated, Dendrite‐Free Anode with Ultrahigh Specific Capacity for Sodium‐Metal Batteries journal November 2019
Designing solid-state electrolytes for safe, energy-dense batteries journal February 2020
A composite solid polymer electrolyte incorporating MnO 2 nanosheets with reinforced mechanical properties and electrochemical stability for lithium metal batteries journal January 2020
A self-powered solar-blind photodetector with large V oc enhancing performance based on the PEDOT:PSS/Ga 2 O 3 organic–inorganic hybrid heterojunction journal January 2020
Preparation of Nanocomposite Polymer Electrolyte via In Situ Synthesis of SiO2 Nanoparticles in PEO journal January 2020
Enhanced Surface Interactions Enable Fast Li + Conduction in Oxide/Polymer Composite Electrolyte journal January 2020

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