Self-Assembled Epitaxial Cathode-Electrolyte Nanocomposites for 3D Microbatteries

Daniel M. Cunha, Nicolas Gauquelin, Rui Xia, Johan Verbeeck, Mark Huijben*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
49 Downloads (Pure)

Abstract

The downscaling of electronic devices requires rechargeable microbatteries with enhanced energy and power densities. Here, we evaluate self-assembled vertically aligned nanocomposite (VAN) thin films as a platform to create high-performance three-dimensional (3D) microelectrodes. This study focuses on controlling the VAN formation to enable interface engineering between the LiMn2O4 cathode and the (Li,La)TiO3 solid electrolyte. Electrochemical analysis in a half cell against lithium metal showed the absence of sharp redox peaks due to the confinement in the electrode pillars at the nanoscale. The (100)-oriented VAN thin films showed better rate capability and stability during extensive cycling due to the better alignment to the Li-diffusion channels. However, an enhanced pseudocapacitive contribution was observed for the increased total surface area within the (110)-oriented VAN thin films. These results demonstrate for the first time the electrochemical behavior of cathode-electrolyte VANs for lithium-ion 3D microbatteries while pointing out the importance of control over the vertical interfaces.

Original languageEnglish
Pages (from-to)42208-42214
Number of pages7
JournalACS Applied Materials and Interfaces
Volume14
Issue number37
Early online date6 Sept 2022
DOIs
Publication statusPublished - 21 Sept 2022

Keywords

  • Battery
  • Epitaxy
  • Nanocomposite
  • Self-assembly
  • Thin films
  • UT-Hybrid-D

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