All-Solid-State Na-O2Batteries with Long Cycle Performance

Kirankumar Venkatesan Savunthari, Chia Hui Yi, Jheng Yi Huang, Kevin Iputera, Shu Fen Hu*, Ru Shi Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

All-solid-state sodium oxygen (ASS Na-O2) batteries have received interest due to their higher theoretical energy density, lower cost, higher safety level, and nonflammability compared with liquid electrolyte and Li-O2 batteries. Here, we report the application of carbon nanotube (CNT) and Ru/CNT cathodes, succinonitrile with a NaClO4 (SN + NaClO4) interlayer, a Na3Zr2Si2PO12 (NZSP) solid electrolyte, and a Na film anode for ASS Na-O2 batteries. Results showed that the SN + NaClO4 interlayer plays a crucial role in the tri-conductive cathode, ionic conductivity, and interfacial charge transfer kinetics between the Ru/CNT cathode and NZSP electrolyte. The ASS Na-O2 batteries with Ru/CNT and SN + NaClO4 tri-conductive cathodes exhibited a long cycling performance of 100 cycles (current density of 100 mA g-1 and limited capacity of 500 mA h g-1), a discharge capacity of 11 034 mA h g-1 (current density of 100 mA g-1), and a small overpotential gap of 1.4 V. These values were better than those for CNT and SN + NaClO4 tri-conductive cathodes (maximum discharge capacity of 2413 mA h g-1, 27 cycles, and potential gap of 1.7 V) with a Na2O2 discharge product. Ex situ analysis showed that the Ru/CNT cathode achieved superior reversibility deposition and decomposition of the Na2O2 discharge product. Therefore, the ASS Na-O2 battery system is safe and stable for energy storage applications.

Original languageEnglish
Pages (from-to)14280-14289
Number of pages10
JournalACS Applied Energy Materials
Volume5
Issue number11
DOIs
Publication statusPublished - 2022 Nov 28

Keywords

  • NZSP solid electrolyte
  • NaOdischarge product
  • Ru/CNT cathode
  • all-solid-state Na-Obattery
  • metal-gas battery
  • succinonitrile interlayer

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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