Capacitive contribution to lithium storage capacity in porous MoO 3 films

Guangyu Zhao, Li Zhang, Kening Sun*

*Corresponding author for this work

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Abstract

Porous MoO3 films are obtained by electrodepositing on Ni substrates. The galvanostatic charge/discharge tests show that, the film cathodes have a reversible capacity of 190 mA h g-1 at a current density of 30 mA g-1 between the voltage limits of 1.5-3.5 V vs. Li+/Li, a much better performance than the pristine MoO3 powder. More than 75% capacitive contribution in the capacity of porous MoO 3 films is responsible for the high capacity, according to the cyclic voltammetry analysis. Another improved property of the porous MoO3 films is the rate performance, which still retains 70 mA h g-1 at a current density of 1.25 A g-1. The chronopotentiometry results reveal that, the prominent rate performances are owing to the high rate ability of the capacitive contribution.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume694
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Capacitive contribution
  • Cyclic voltammetry
  • Electrodeposition
  • Molybdenum trioxide
  • Porous films

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Zhao, G., Zhang, L., & Sun, K. (2013). Capacitive contribution to lithium storage capacity in porous MoO 3 films. Journal of Electroanalytical Chemistry, 694, 61-67. https://doi.org/10.1016/j.jelechem.2013.02.005