Pouch-type hybrid Li-air battery enabled by flexible composite lithium-ion conducting membrane

Shao Hao Lu, Hsin Chun Lu*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

10 Scopus citations

Abstract

Pouch-type hybrid Li-air batteries with an air-breathing ability and lightweight packaging provide improved specific energy compared with commercial Li-ion batteries and Li–O2 batteries that require oxygen supply equipment. Because ceramic Li-ion conductors, used to separate aprotic and aqueous electrolytes, are brittle and inflexible, hybrid Li-air batteries are difficult to assemble into pouch cells for use in flexible device applications. A flexible pouch-type hybrid Li-air battery is realized by utilizing a flexible composite lithium-ion conducting membrane (FCLICM). This FCLICM, consisting of sol-gel-derived Li1+xAlxTi2-x(PO4)3 (LATP) as a Li-ion conductor and a chemically compatible poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer matrix, is produced by the tape-casting technique and applied in hybrid Li-air batteries. An assembled pouch-type hybrid Li-air battery containing a lithium foil anode, an aprotic electrolyte, an FCLICM, an aqueous electrolyte and a platinum air cathode is operated in ambient air, exhibiting a high capacity of 200 mAh g−1 with a cycle life of 12 cycles (48 h). This pouch cell shows an open-circuit voltage of 3.16 V regardless of being flat or bent, demonstrating its flexibility and electrochemical stability and its potential for use in wearable technology.

Original languageEnglish
Article number229431
JournalJournal of Power Sources
Volume489
DOIs
StatePublished - 31 03 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Flexible composite lithium-ion conducting membrane
  • Hybrid Li-air battery
  • LATP
  • PVDF-HFP
  • Pouch-type

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