Type

Journal Article

Authors

Colm O'Dwyer
D. Noel Buckley
David McNulty

Subjects

Physics

Topics
energy storage li ion batteries cathode materials lithium ion batteries nanocrystal nanorods v203 polycrystalline nanorods li metal

V2O3 polycrystalline nanorod cathode materials for Li-Ion batteries with long cycle life and high capacity retention (2017)

Abstract We report on the electrochemical performance of V2O3 polycrystalline nanorods (poly-NRs) as a cathode material for Li-ion batteries. Poly-NRs are formed through the thermal treatment of V2O5 nanotubes in a N2 atmosphere. X-ray and electron diffraction techniques are used to confirm the thermal reduction. Through galvanostatic cycling, we demonstrate that poly-NRs offer excellent capacity retention over 750 cycles. The capacity retention from the 50th to the 750th cycle was an impressive 94 %, retaining a capacity of approximately 120 mAh g−1 after 750 cycles. The outstanding stability of the nanocrystal-containing V2O3 poly-NRs over many cycles demonstrates that vanadium(III) oxide (V2O3) performs very well as a cathode material. Full Li-ion cells with paired a V2O3 poly-NR cathode and a pre-charged Co3O4 inverse opal (IO) conversion mode anode demonstrated high initial capacities and retained a capacity of 153 mAh g−1 after 50 cycles. The capacities achieved with our V2O3 poly-NRs/Co3O4 IO full cells are comparable to the capacities obtained from the most commonly used cathode materials when cycled in a half-cell arrangement versus pure Li metal.
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Full list of authors on original publication

Colm O'Dwyer, D. Noel Buckley, David McNulty

Experts in our system

1
Colm O'Dwyer
University College Cork
Total Publications: 121
 
2
D. Noel Buckley
University College Cork
Total Publications: 27
 
3
David McNulty
University College Cork
Total Publications: 20