Ceramicized NASICON-based solid-state electrolytes for lithium metal batteries

Yung Chun Tsai, Meng Chiao Ku, Chien Te Hsieh, Po Yu Sung, Pin Shuan Chen, Debabrata Mohanty, Yasser Ashraf Gandomi, I. Ming Hung, Jagabandhu Patra, Jeng Kuei Chang

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we have developed ceramicized hybrid solid state electrolytes (SSEs), which consisted of poly (vinylidene fluoride-hexafluoro propylene) (PVDF-HFP), lithium bis (trifluoromethanesulfonyl)imide (LiTFSI) salt, and sodium superionic conductor (NASICON)-type Li1+xAl xTi2‒x(PO4)3 (LATP) powders for lithium-ion batteries (LIBs) utilizing lithium metal anode. Adopting the sol–gel synthesis technique followed by a thermal calcination at 850 °C, we synthesized round-like LATP powders with an average particle size of ~ 30 μm. Engineering the LATP content (~ 45 wt.%) within the hybrid SSEs, we were able to achieve thermal stability along with superior ionic conductivity (i.e., 1.40 × 10−4 S cm−1 at 30 °C). Employing the Arrhenius plot in the temperature range of 30‒70 °C, the activation energy for the ionic conduction was lowered significantly (i.e., 0.21 eV) compared to prior efforts reported in the literature (i.e., 0.27 − 0.35 eV). The application of highly optimized SSE within a LIB with lithium metal anode resulted in the maximal capacity of ~ 162 mAh g−1 at 0.1 C. The cyclic performance of the battery utilizing such an optimized SSE configuration was very robust with a highly stable coulombic efficiency (~ 96.7%) after 100 cycles. Indeed, the ceramicized LATP-based SSEs developed in this work, can be employed for boosting the ionic conductivity, specific capacity, and cycle life while mitigating the interfacial resistance of the electrolyte/electrode layer for LIBs with lithium metal anode.

Original languageEnglish
JournalJournal of Solid State Electrochemistry
DOIs
Publication statusAccepted/In press - 2023

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Chemistry

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