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Porous perovskite LaNiO3 nanocubes as cathode catalysts for Li-O2 batteries with low charge potential.

Zhang J, Zhao Y, Zhao X, Liu Z, Chen W - Sci Rep (2014)

Bottom Line: The as-prepared battery showed excellent charging performance with significantly reduced overpotential (3.40 V).Furthermore, it was found that the lithium anode corrosion and cathode passivation were responsible for the capacity fading of Li-O2 battery.Our results indicated that porous LaNiO3 nanocubes represent a promising cathode catalyst for Li-O2 battery.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.

ABSTRACT
Developing efficient catalyst for oxygen evolution reaction (OER) is essential for rechargeable Li-O2 battery. In our present work, porous LaNiO3 nanocubes were employed as electrocatalyst in Li-O2 battery cell. The as-prepared battery showed excellent charging performance with significantly reduced overpotential (3.40 V). The synergistic effect of porous structure, large specific surface area and high electrocatalytic activity of porous LaNiO3 nanocubes ensured the Li-O2 battery with enchanced capacity and good cycle stability. Furthermore, it was found that the lithium anode corrosion and cathode passivation were responsible for the capacity fading of Li-O2 battery. Our results indicated that porous LaNiO3 nanocubes represent a promising cathode catalyst for Li-O2 battery.

No MeSH data available.


Related in: MedlinePlus

(a) First discharge-charge curves of Li-O2 batteries with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at 0.08 mA cm−2; (b) First discharge-charge curves of Li-O2 battery with porous LaNiO3 nanocubes electrode at 0.16, 0.08, 0.04 and 0.016 mA cm−2; (c) Chronoamperometry showing normalized current evolution with time for various catalysts at 2.25 V; (d) Linear sweep voltammetry of porous LaNiO3 nanocubes, LaNiO3 particles and Vulcan X72 carbon catalysts.
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f3: (a) First discharge-charge curves of Li-O2 batteries with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at 0.08 mA cm−2; (b) First discharge-charge curves of Li-O2 battery with porous LaNiO3 nanocubes electrode at 0.16, 0.08, 0.04 and 0.016 mA cm−2; (c) Chronoamperometry showing normalized current evolution with time for various catalysts at 2.25 V; (d) Linear sweep voltammetry of porous LaNiO3 nanocubes, LaNiO3 particles and Vulcan X72 carbon catalysts.

Mentions: The electrochemical performance of the porous LaNiO3 nanocubes catalyst was measured by the galvanostatic charge-discharge measurements in a modified Swagelok Li-O2 battery cell using 1 M lithium trifluoromethanesulfonate/tetraethylene glycol dimethyl ether (LiCF3SO3/TEGDME) as the electrolyte. Reference cathodes made by either LaNiO3 particles or commercial VX-72 carbon were employed for comparison. Fig. 3a shows the first discharge-charge profiles of the Li-O2 cells with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at a current density of 0.08 mA cm−2. The discharge capacity of the battery cell with porous LaNiO3 nanocubes electrode was up to 3407 mAh g−1, which was higher than that of the LaNiO3 particles (2639 mAh g−1) and VX-72 carbon (2545 mAh g−1) electrodes based batteries. The enhanced discharge capacity of the porous LaNiO3 nanocubes electrode was attributed to their high catalytic activity to promote the ORR.


Porous perovskite LaNiO3 nanocubes as cathode catalysts for Li-O2 batteries with low charge potential.

Zhang J, Zhao Y, Zhao X, Liu Z, Chen W - Sci Rep (2014)

(a) First discharge-charge curves of Li-O2 batteries with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at 0.08 mA cm−2; (b) First discharge-charge curves of Li-O2 battery with porous LaNiO3 nanocubes electrode at 0.16, 0.08, 0.04 and 0.016 mA cm−2; (c) Chronoamperometry showing normalized current evolution with time for various catalysts at 2.25 V; (d) Linear sweep voltammetry of porous LaNiO3 nanocubes, LaNiO3 particles and Vulcan X72 carbon catalysts.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4125986&req=5

f3: (a) First discharge-charge curves of Li-O2 batteries with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at 0.08 mA cm−2; (b) First discharge-charge curves of Li-O2 battery with porous LaNiO3 nanocubes electrode at 0.16, 0.08, 0.04 and 0.016 mA cm−2; (c) Chronoamperometry showing normalized current evolution with time for various catalysts at 2.25 V; (d) Linear sweep voltammetry of porous LaNiO3 nanocubes, LaNiO3 particles and Vulcan X72 carbon catalysts.
Mentions: The electrochemical performance of the porous LaNiO3 nanocubes catalyst was measured by the galvanostatic charge-discharge measurements in a modified Swagelok Li-O2 battery cell using 1 M lithium trifluoromethanesulfonate/tetraethylene glycol dimethyl ether (LiCF3SO3/TEGDME) as the electrolyte. Reference cathodes made by either LaNiO3 particles or commercial VX-72 carbon were employed for comparison. Fig. 3a shows the first discharge-charge profiles of the Li-O2 cells with porous LaNiO3 nanocubes, LaNiO3 particles and VX-72 carbon electrodes at a current density of 0.08 mA cm−2. The discharge capacity of the battery cell with porous LaNiO3 nanocubes electrode was up to 3407 mAh g−1, which was higher than that of the LaNiO3 particles (2639 mAh g−1) and VX-72 carbon (2545 mAh g−1) electrodes based batteries. The enhanced discharge capacity of the porous LaNiO3 nanocubes electrode was attributed to their high catalytic activity to promote the ORR.

Bottom Line: The as-prepared battery showed excellent charging performance with significantly reduced overpotential (3.40 V).Furthermore, it was found that the lithium anode corrosion and cathode passivation were responsible for the capacity fading of Li-O2 battery.Our results indicated that porous LaNiO3 nanocubes represent a promising cathode catalyst for Li-O2 battery.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.

ABSTRACT
Developing efficient catalyst for oxygen evolution reaction (OER) is essential for rechargeable Li-O2 battery. In our present work, porous LaNiO3 nanocubes were employed as electrocatalyst in Li-O2 battery cell. The as-prepared battery showed excellent charging performance with significantly reduced overpotential (3.40 V). The synergistic effect of porous structure, large specific surface area and high electrocatalytic activity of porous LaNiO3 nanocubes ensured the Li-O2 battery with enchanced capacity and good cycle stability. Furthermore, it was found that the lithium anode corrosion and cathode passivation were responsible for the capacity fading of Li-O2 battery. Our results indicated that porous LaNiO3 nanocubes represent a promising cathode catalyst for Li-O2 battery.

No MeSH data available.


Related in: MedlinePlus