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The discharge rate capability of rechargeable Li–O2 batteries
Abstract
The O2electrode in Li–O2cells was shown to exhibit gravimetric energy densities (considering the total weight of oxygen electrode in the discharged state) four times that of LiCoO2 with comparable gravimetric power. The discharge rate capability of Au-catalyzed Vulcan carbon and pure Vulcan carbon (VC) as the O2electrode was studied in the range of 100 to 2000 mA gcarbon−1. The discharge voltage and capacity of the Li−O2 cells were shown to decrease with increasing rates. Unlike propylene carbonate based electrolytes, the rate capability of Li−O2 cells tested with 1,2-dimethoxyethane was found not to be limited by oxygen transport in the electrolyte. X-Ray diffraction (XRD) showed lithium peroxide as the discharge product and no evidence of Li2CO3 and LiOH was found. It is hypothesized that higher discharge voltages of cells with Au/C than VC at low rates could have originated from higher oxygen reduction activity of Au/C. At high rates, higher discharge voltages with Au/C than VC could be attributed to faster lithium transport in nonstoichiometric and defective lithium peroxide formed upon discharge, which is supported by XRD and X-ray absorption near edge structure O and Li K edge data.
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Citations
Cited by
Li-O2 and Li-S batteries with high energy storage
Bruce, P. G., Freunberger, S. A., Hardwick, L. J., & Tarascon, J.-M. (2012) · Nature Materials · doi:10.1038/nmat3191 · Cited by 9,479
Current density dependence of peroxide formation in the Li–O2 battery and its effect on charge
Adams, B. D., Radtke, C., Black, R., Trudeau, M. L., Zaghib, K., & Nazar, L. F. (2013) · Energy & Environmental Science · doi:10.1039/c3ee40697k · Cited by 678
Catalytic Activity Trends of Oxygen Reduction Reaction for Nonaqueous Li-Air Batteries
Lu, Y.-C., Gasteiger, H. A., & Shao-Horn, Y. (2011) · Journal of the American Chemical Society · doi:10.1021/ja208608s · Cited by 567
Self-citationArtificial Protection Film on Lithium Metal Anode toward Long‐Cycle‐Life Lithium–Oxygen Batteries
Liu, Q., Xu, J., Yuan, S., Chang, Z., Xu, D., Yin, Y., Li, L., Zhong, H., Jiang, Y., Yan, J., et al. (2015) · Advanced Materials · doi:10.1002/adma.201501490 · Cited by 482
Chemical and Morphological Changes of Li–O2 Battery Electrodes upon Cycling
Gallant, B. M., Mitchell, R. R., Kwabi, D. G., Zhou, J., Zuin, L., Thompson, C. V., & Shao-Horn, Y. (2012) · The Journal of Physical Chemistry C · doi:10.1021/jp308093b · Cited by 382
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Metadata
- Authors
- Lu, Y.-C., Kwabi, D. G., Yao, K. P. C., Harding, J. R., Zhou, J., Zuin, L., & Shao-Horn, Y.
- Venue
- Energy & Environmental Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2011
- Volume
- 4
- Issue
- 8
- Pages
- 2999
- ISSN
- 1754-5692 (ISSN-L)
- 1754-5706
- OpenAlex
- W2065146264
- Cited by
- 415
- References
- 0
- FWCI
- 37.21
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lu, Y.-C., Kwabi, D. G., Yao, K. P. C., Harding, J. R., Zhou, J., Zuin, L., & Shao-Horn, Y. (2011). The discharge rate capability of rechargeable Li–O2 batteries. Energy & Environmental Science. https://doi.org/10.1039/c1ee01500a
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