Planar and 3D deposition of Li4Ti5O12 thin film electrodes by MOCVD

Jie Xie*, Peter Paul R M L Harks, Dongjiang Li, Lucas H J Raijmakers, Peter H L Notten

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

Abstract

Li4Ti5O12 is well known to be a safe and efficient anode material for Li-ion batteries. A metal-organic chemical vapor deposition process has been developed for the synthesis of Li4Ti5O12 thin film anodes on planar and 3D substrates. The influences of various deposition parameters, including precursor flow rates and post-annealing temperatures, have been investigated by material and electrochemical analyses. Li4Ti5O12 thin films deposited at the optimized process parameters showed a high crystallinity and high electrochemical activity. A reversible storage capacity of 151 mAh/g was achieved at a current of 0.5 C, corresponding to 86.3% of the theoretical specific capacity of Li4Ti5O12. Up to almost 600 cycles, the electrodes showed no significant capacity loss. Furthermore, the deposited thin film anodes also showed excellent rate performance. Compared to the storage capacity at 0.5 C, 93% of the capacity was maintained at 10 C. Thin films were also deposited on highly structured substrates to investigate the uniformity and electrochemical performance. With the same footprint area, the 3D Li4Ti5O12 film anode showed a 2.5 times higher storage capacity than planar electrode.

Original languageEnglish
Pages (from-to)83-88
JournalSolid State Ionics
Volume287
DOIs
Publication statusPublished - 2016

Keywords

  • 3D
  • Film Electrodes
  • LiTiO
  • MOCVD

Fingerprint

Dive into the research topics of 'Planar and 3D deposition of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> thin film electrodes by MOCVD'. Together they form a unique fingerprint.

Cite this