Limits...
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), (b) Cyclic performance of porous LaNiO3 nanocubes electrode at 0.08 mA cm−2 with limited capacity of 1000 mAh g−1 and 500 mAh g−1, respectively; (c) Cyclic performance of VX-72 carbon electrode at 0.08 mA cm−2 with limited capacity of 500 mAh g−1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4125986&req=5

f6: (a), (b) Cyclic performance of porous LaNiO3 nanocubes electrode at 0.08 mA cm−2 with limited capacity of 1000 mAh g−1 and 500 mAh g−1, respectively; (c) Cyclic performance of VX-72 carbon electrode at 0.08 mA cm−2 with limited capacity of 500 mAh g−1.

Mentions: To minimize the side effects caused by anode corrosion and cathode passivation, we measured the Li-O2 battery cell with porous LaNiO3 nanocubes electrode following a recently widely adoped method5354 by limiting the depth of discharge and “rebuilt” the cell with fresh Li metals during the test process. Improved cycle performance of Li-O2 battery was obtained. Fig. 6a shows the voltage profiles of porous LaNiO3 nanocubes electrode cycled at 0.08 mA cm−2 with the curtailing capacity of 1000 mAh g−1. The discharge-charge cycling was carried out for 23 cycles without abvious capacity fading (Fig. 6a). Reducing the curtailing capacity to 500 mAh g−1, the cycle number of the battery could increase to 75 cycles (Fig. 6b), which was much larger than that of VX-72 carbon electrode with 22 cycles under the same condition (Fig. 6c). These results indicate that the porous LaNiO3 nanocubes electrodes have good rechargeability and cyclability.


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), (b) Cyclic performance of porous LaNiO3 nanocubes electrode at 0.08 mA cm−2 with limited capacity of 1000 mAh g−1 and 500 mAh g−1, respectively; (c) Cyclic performance of VX-72 carbon electrode at 0.08 mA cm−2 with limited capacity of 500 mAh g−1.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f6: (a), (b) Cyclic performance of porous LaNiO3 nanocubes electrode at 0.08 mA cm−2 with limited capacity of 1000 mAh g−1 and 500 mAh g−1, respectively; (c) Cyclic performance of VX-72 carbon electrode at 0.08 mA cm−2 with limited capacity of 500 mAh g−1.
Mentions: To minimize the side effects caused by anode corrosion and cathode passivation, we measured the Li-O2 battery cell with porous LaNiO3 nanocubes electrode following a recently widely adoped method5354 by limiting the depth of discharge and “rebuilt” the cell with fresh Li metals during the test process. Improved cycle performance of Li-O2 battery was obtained. Fig. 6a shows the voltage profiles of porous LaNiO3 nanocubes electrode cycled at 0.08 mA cm−2 with the curtailing capacity of 1000 mAh g−1. The discharge-charge cycling was carried out for 23 cycles without abvious capacity fading (Fig. 6a). Reducing the curtailing capacity to 500 mAh g−1, the cycle number of the battery could increase to 75 cycles (Fig. 6b), which was much larger than that of VX-72 carbon electrode with 22 cycles under the same condition (Fig. 6c). These results indicate that the porous LaNiO3 nanocubes electrodes have good rechargeability and cyclability.

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