3D Ion-Conducting, Scalable, and Mechanically Reinforced Ceramic Film for High Voltage Solid-State Batteries

Hyun Woo Kim, Jinhyup Han, Young Jun Lim, Yun Seok Choi, Eungje Lee, Youngsik Kim

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Concerning the safety aspects of Li+ ion batteries, an epoxy-reinforced thin ceramic film (ERTCF) is prepared by firing and sintering a slurry-casted composite powder film. The ERTCF is composed of Li+ ion conduction channels and is made of high amounts of sintered ceramic Li1+xTi2-xAlx(PO4)3 (LATP) and epoxy polymer with enhanced mechanical properties for solid-state batteries. The 2D and 3D characterizations are conducted not only for showing continuous Li+ ion channels thorough LATP ceramic channels with over 10−4 S cm−1 of ionic conductivity but also to investigate small amounts of epoxy polymer with enhanced mechanical properties. Solid-state Li+ ion cells are fabricated using the ERTCF and they show initial charge–discharge capacities of 139/133 mAh g−1. Furthermore, the scope of the ERTCF is expanded to high-voltage (>8 V) solid-state Li+ ion batteries through a bipolar stacked cell design. Hence, it is expected that the present investigation will significantly contribute in the preparation of the next generation reinforced thin ceramic film electrolytes for high-voltage solid-state batteries.

Original languageEnglish
Article number2002008
JournalAdvanced Functional Materials
Volume31
Issue number2
DOIs
StatePublished - 11 Jan 2021

Keywords

  • all-solid-state batteries
  • epoxy polymers
  • lithium ion batteries
  • solid electrolytes

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