Free-Standing, Robust, and Stable Li+Conductive Li(Sr,Zr)2(PO4)3/PEO Composite Electrolytes for Solid-State Batteries
Document Type
Article
Publication Date
1-1-2021
Abstract
We developed promising soft-rigid and free-standing composite electrolytes by mixing a Sr-doped LiZr2(PO4)3 compound with a poly(ethylene oxide) (PEO)-based polymer for Li+-ion conductors. Using crystal formation modeling, we synthesized a thermodynamically stable Li(Sr,Zr)2(PO4)3 compound with the formation of composite electrolytes via PEO-based in situ radical polymerization, which possessed a good ionic conductivity (5.75 × 10-4 S cm-1). The cell with Li/composite electrolyte/LiFePO4 showed a capacity retention rate of 80% after 100 cycles at room temperature. The corresponding composite electrolyte film demonstrated superior electrochemical behavior even when assembling pouch-Type cells without any interfacial control during the cell assembly, that is, without post-Treatment such as soaking liquid electrolytes or over-coated interlayers. This suggested that the optimal phosphate composition followed by the formation of a PEO-based polymer electrolyte will be suitable for Li+-ion transporting films and/or the Li metal protection layer for solid-state Li+-ion rechargeable batteries operating at room temperature.
Publication Title
ACS Applied Energy Materials
Recommended Citation
Park, H.,
Lee, E.,
Kim, S.,
Seong, S.,
Suh, J.,
Wu, M.,
Kang, Y.,
Choi, S.,
Kim, Y.,
&
Choi, S.
(2021).
Free-Standing, Robust, and Stable Li+Conductive Li(Sr,Zr)2(PO4)3/PEO Composite Electrolytes for Solid-State Batteries.
ACS Applied Energy Materials.
http://doi.org/10.1021/acsaem.1c02784
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/15617
