Aluminum Interdiffusion into LiCoO 2 Using Atomic Layer Deposition for High Rate Lithium Ion Batteries

Takasi Teranisi, Yumi Yoshikawa, Mika Yoneda, Akira Kishimoto, Jennifer Halpin, Shane O'Brien, Mircea Modreanu, Ian M. Povey

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Here, as with previous work, atomic layer deposition (ALD) has been used to deposit Al 2 O 3 on positive electrode active materials, LiCoO 2 , to create a protective barrier layer, suppress the high potential phase transition, and thus reduce the subsequent Co dissolution. However, in this study it was found that it also resulted in the reduction of the charge transfer resistance at the positive electrode-electrolyte interface, thus enhancing the performance of the battery. Energy-dispersive X-ray spectroscopy, in conjunction with transmission electron microscopy, shows that a discrete Al 2 O 3 shell was not formed under the selected growth conditions and that the Al diffused into the bulk LiCoO 2 . The resulting active oxide material, which was significantly thicker than the nominally ALD growth rate would predict, is proposed to be of the form LiCoO 2 :Al with amorphous and crystalline regions depending on the Al content. The cells consisting of the modified electrodes were found to have good cycling stability and discharge capacities of ∼110 mA h g -1 (0.12 mA h cm -2 ) and ∼35 mA h g -1 (0.04 mA h cm -2 ) at 50 and 100 C, respectively.

Original languageEnglish
Pages (from-to)3277-3282
Number of pages6
JournalACS Applied Energy Materials
Volume1
Issue number7
DOIs
Publication statusPublished - Jul 23 2018

Keywords

  • Al O
  • atomic layer deposition
  • charge transfer
  • high charge-discharge rate
  • lithium ion batteries
  • solid electrolyte interface

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Aluminum Interdiffusion into LiCoO <sub>2</sub> Using Atomic Layer Deposition for High Rate Lithium Ion Batteries'. Together they form a unique fingerprint.

  • Cite this