Cross-Linked Composite Solid Polymer Electrolyte Doped with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 for High Voltage Lithium Metal Batteries
Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Composite solid polymer electrolytes (CSPEs) are safer alternatives to liquid electrolytes and excellent candidates for high-voltage solid-state batteries. However, interfacial instabilities between the electrodes and CSPEs are one of the bottlenecks in pursuing these systems. In this study, a cross-linked CSPE was synthesized based on polypropylene carbonate, polyethylene glycol methyl ether acrylate, polyethylene glycol diacrylate with additives including lithium bis(trifluoromethane)sulfonimide salt, and tantalum-doped lithium lanthanum zirconium oxide (LLZTO). Mass fractions of 10, 20, and 40% LLZTO were added to the CSPE matrix. In a symmetric cell, lithium plating and stripping revealed that the interface between the lithium metal anode and CSPE with 10% of the LLZTO (CSPE-10LLZTO) shows the most stable interface. The CSPE-10LLZTO sample demonstrated high flexibility and showed no degradation over 800 h of cycling at varying current densities. The ionic conductivity for the CSPE-10LLZTO sample at 40 °C was 6.4 × 10 –4 S/cm. An all-solid-state full cell was fabricated with LiNi 0.5 Mn 0.3 Co 0.2 O 2 as the cathode, CSPE-10LLZTO as the electrolyte and separator, and Li metal as the anode, delivering approximately 140 mAh/g of capacity. Differential scanning calorimetry measurements on CSPE- x LLZTO showed high miscibility and the elimination of crystallinity. Raman spectroscopy revealed uniformity in the structure. These findings demonstrate the capability of the CSPEs to develop high-voltage solid-state lithium metal batteries.
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Tulane University, University of Notre Dame, Xavier University of Louisiana, Office of Science, Glenn Research Center, Division of Materials Research, Division of Chemical, Bioengineering, Environmental, and Transport Systems, Basic Energy Sciences, National Institute on Minority Health and Health Disparities, Energy Frontier Research Centers
Awards: THE DEVELOPMENT OF STABLE, ULTRA HIGH ENERGY DENSITY AND ALL SOLID STATE LITHIUM BATTERIES WITH EXCELLENT SAFETY AND RATE PERFORMANCE ARE NEEDED FOR, G219736907, G2597527574, G3995797862, G4225422746, G4353179022, G479603752, G4836174007, G5546441129, CENTER FOR MESOSCALE TRANSPORT PROPERTIES, CENTER FOR MESOSCALE TRANSPORT PROPERTIES
OpenAlex ID: W4401687267