Enhanced charge storage of nanometric ζ-V2O5 in Mg electrolytes. Academic Article uri icon

abstract

  • V2O5 is of interest as a Mg intercalation electrode material for Mg batteries, both in its thermodynamically stable layered polymorph (α-V2O5) and in its metastable tunnel structure (ζ-V2O5). However, such oxide cathodes typically display poor Mg insertion/removal kinetics, with large voltage hysteresis. Herein, we report the synthesis and evaluation of nanosized (ca. 100 nm) ζ-V2O5 in Mg-ion cells, which displays significantly enhanced electrochemical kinetics compared to microsized ζ-V2O5. This effect results in a significant boost in stable discharge capacity (130 mA h g-1) compared to bulk ζ-V2O5 (70 mA h g-1), with reduced voltage hysteresis (1.0 V compared to 1.4 V). This study reveals significant advancements in the use of ζ-V2O5 for Mg-based energy storage and yields a better understanding of the kinetic limiting factors for reversible magnesiation reactions into such phases.

published proceedings

  • Nanoscale

altmetric score

  • 1.5

author list (cited authors)

  • Johnson, I. D., Nolis, G., Yin, L., Yoo, H. D., Parajuli, P., Mukherjee, A., ... Darr, J. A

citation count

  • 7

complete list of authors

  • Johnson, Ian D||Nolis, Gene||Yin, Liang||Yoo, Hyun Deog||Parajuli, Prakash||Mukherjee, Arijita||Andrews, Justin L||Lopez, Mario||Klie, Robert F||Banerjee, Sarbajit||Ingram, Brian J||Lapidus, Saul||Cabana, Jordi||Darr, Jawwad A

publication date

  • November 2020