Intercalation of Lithium Ions from Gaseous Precursors into beta-MnO2 Thin Films Deposited by Atomic Layer Deposition

Heta Nieminen, Ville Miikkulainen, Daniel Settipani, Laura Simonelli, Philipp Hönicke, Claudia Zech, Yves Kayser, Burkhard Beckhoff, Ari-Pekka Honkanen, Mikko Heikkilä, Kenichiro Mizohata, Nils Kristoffer Meinander, Oili M. E. Ylivaara, Simo Huotari, Mikko Ritala

Research output: Contribution to journalArticleScientificpeer-review

Abstract

LiMn2O4 is a promising candidate for a cathode material in lithium-ion batteries because of its ability to intercalate lithium ions reversibly through its three-dimensional manganese oxide network. One of the promising techniques for depositing LiMn2O4 thin-film cathodes is atomic layer deposition (ALD). Because of its unparalleled film thickness control and film conformality, ALD helps to fulfill the industry demands for smaller devices, nanostructured electrodes, and all-solid-state batteries. In this work, the intercalation mechanism of Li+ ions into an ALD-grown beta-MnO2 thin film was studied. Samples were prepared by pulsing (LiOBu)-Bu-t and H2O for different cycle numbers onto about 100 nm thick MnO2 films at 225 degrees C and characterized with X-ray absorption spectroscopy, X-ray diffraction, X-ray reflectivity, time-of-flight elastic recoil detection analysis, and residual stress measurements. It is proposed that for

Original languageEnglish
JournalJournal of Physical Chemistry C
Volume123
Issue number25
Pages (from-to)15802-15814
Number of pages13
ISSN1932-7447
DOIs
Publication statusPublished - 27 Jun 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • CATHODE
  • ELECTROCHEMICAL CHARACTERIZATION
  • ELECTRONIC-STRUCTURE
  • FINE-STRUCTURE
  • INSERTION
  • LOCAL-STRUCTURE
  • MANGANESE OXIDE
  • SPINEL LIMN2O4
  • STRUCTURAL PHASE-TRANSITION
  • X-RAY-ABSORPTION
  • 114 Physical sciences
  • 116 Chemical sciences

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