A promising composite room temperature solid electrolyte via incorporating LLZTO into cross-linked ETPTA/PEO/SN matrix for all solid state lithium batteries
Composite solid electrolyte (CSE), especially the composite room temperature solid electrolyte (CRTSE), is emerging as the promising electrolyte for all-solid-state lithium batteries (ASSLB) due to their ability to combine the desirable properties of ceramic and polymer-based electrolytes and the ro...
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Veröffentlicht in: | Ionics 2024-04, Vol.30 (4), p.2007-2017 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Composite solid electrolyte (CSE), especially the composite room temperature solid electrolyte (CRTSE), is emerging as the promising electrolyte for all-solid-state lithium batteries (ASSLB) due to their ability to combine the desirable properties of ceramic and polymer-based electrolytes and the room temperature operation condition. In this paper, the CRTSE with polyethylene oxide (PEO), bis(fluorosulfonyl)imide (LiTFSI), succinonitrile (SN), LLZTO inorganic fillers, and cross-linked ethoxylated trimethylolpropane triacrylate (ETPTA) was proposed. With the help of lithium dendrite suppression via cross-linked microscopic pore structure, enhancement of the ionic conductivity via LLZTO fillers, and wide electrochemical window via SN, the obtained LCSE showed high ionic conductivity (2.12 × 10
−4
S cm
−1
), high Li
+
transfer number (
t
Li
+
= 0.55), and stable electrochemical window (5.0 V vs Li/Li
+
) at room temperature. The Li symmetrical cell with LCSE can cycle over 500 h stably with current density of 0.1 mA cm
−2
and 0.5 mA cm
−2
at room temperature. The full solid-state LiFePO
4
cell can successfully work over 200 cycles with capacity retention ratio of about 70% at room temperature. |
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ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-024-05451-2 |