Aluminum Interdiffusion into LiCoO2 Using Atomic Layer Deposition for High Rate Lithium Ion Batteries

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

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Here, as with previous work, atomic layer deposition (ALD) has been used to deposit Al2O3 on positive electrode active materials, LiCoO2, 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 Al2O3 shell was not formed under the selected growth conditions and that the Al diffused into the bulk LiCoO2. The resulting active oxide material, which was significantly thicker than the nominally ALD growth rate would predict, is proposed to be of the form LiCoO2: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
Issue number7
Publication statusPublished - Jul 23 2018


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

ASJC Scopus subject areas

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


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