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Title: A Silica-Aerogel-Reinforced Composite Polymer Electrolyte with High Ionic Conductivity and High Modulus

Journal Article · · Advanced Materials
 [1];  [2];  [1];  [1];  [1];  [1]; ORCiD logo [3]
  1. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering
  2. Stanford Univ., CA (United States). Dept. of Mechanical Engineering
  3. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)

High-energy all-solid-state lithium (Li) batteries have great potential as next-generation energy-storage devices. Among all choices of electrolytes, polymer-based systems have attracted widespread attention due to their low density, low cost, and excellent processability. However, they are generally mechanically too weak to effectively suppress Li dendrites and have lower ionic conductivity for reasonable kinetics at ambient temperature. Here, an ultrastrong reinforced composite polymer electrolyte (CPE) is successfully designed and fabricated by introducing a stiff mesoporous SiO2 aerogel as the backbone for a polymer-based electrolyte. The interconnected SiO2 aerogel not only performs as a strong backbone strengthening the whole composite, but also offers large and continuous surfaces for strong anion adsorption, which produces a highly conductive pathway across the composite. As a consequence, a high modulus of ≈0.43 GPa and high ionic conductivity of ≈0.6 mS cm-1 at 30°C are simultaneously achieved. Furthermore, LiFePO4–Li full cells with good cyclability and rate capability at ambient temperature are obtained. Full cells with cathode capacity up to 2.1 mAh cm-2 are also demonstrated. The aerogel-reinforced CPE represents a new design principle for solid-state electrolytes and offers opportunities for future all-solid-state Li batteries.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; ECCS-1542152
OSTI ID:
1470755
Alternate ID(s):
OSTI ID: 1457072
Journal Information:
Advanced Materials, Vol. 30, Issue 32; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 381 works
Citation information provided by
Web of Science

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Cited By (26)

High‐Performance Solid Polymer Electrolytes Filled with Vertically Aligned 2D Materials journal February 2019
Electro–Chemo–Mechanical Issues at the Interfaces in Solid‐State Lithium Metal Batteries journal April 2019
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
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
3D Vertically Aligned Li Metal Anodes with Ultrahigh Cycling Currents and Capacities of 10 mA cm −2 /20 mAh cm −2 Realized by Selective Nucleation within Microchannel Walls journal January 2020
A Supramolecular Electrolyte for Lithium‐Metal Batteries journal November 2019
Recent Progress in Organic–Inorganic Composite Solid Electrolytes for All‐Solid‐State Lithium Batteries journal November 2019
Li + ‐Containing, Continuous Silica Nanofibers for High Li + Conductivity in Composite Polymer Electrolyte journal September 2019
Composition Modulation and Structure Design of Inorganic‐in‐Polymer Composite Solid Electrolytes for Advanced Lithium Batteries journal October 2019
Mechanically Robust Gel Polymer Electrolyte for an Ultrastable Sodium Metal Battery journal December 2019
Two-dimensional molecular brush-functionalized porous bilayer composite separators toward ultrastable high-current density lithium metal anodes journal March 2019
g-C 3 N 4 nanosheets enhanced solid polymer electrolytes with excellent electrochemical performance, mechanical properties, and thermal stability journal January 2019
A borate decorated anion-immobilized solid polymer electrolyte for dendrite-free, long-life Li metal batteries journal January 2019
A functional-gradient-structured ultrahigh modulus solid polymer electrolyte for all-solid-state lithium metal batteries journal January 2019
Embedded 3D Li + channels in a water-in-salt electrolyte to develop flexible supercapacitors and lithium-ion batteries journal January 2019
Engineering a “nanonet”-reinforced polymer electrolyte for long-life Li–O 2 batteries journal January 2019
Realization of the Li + domain diffusion effect via constructing molecular brushes on the LLZTO surface and its application in all-solid-state lithium batteries journal January 2019
High-performance all-solid-state batteries enabled by salt bonding to perovskite in poly(ethylene oxide) journal August 2019
Review on Polymer-Based Composite Electrolytes for Lithium Batteries journal August 2019
Safety Issues in Lithium Ion Batteries: Materials and Cell Design journal July 2019
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High-Voltage Sulfolane Plasticized UV-Curable Gel Polymer Electrolyte journal August 2019
A Supramolecular Electrolyte for Lithium‐Metal Batteries journal October 2019

Figures / Tables (5)


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