Abstract
The interaction of lithium peroxide (Li2O2) with carbon electrodes in Li-air batteries is studied with model systems of graphene-intercalated Li2O2, using density functional theory (DFT) methods. Although both the Li2O2 bulk and its stoichiometric surface structures (without single O atoms) are insulating, the incorporation of graphene sheets into the Li2O2 introduces hole states in the oxygen orbitals due to the electron transfer from the anti-bonding O2 orbitals to the graphene sheets. This indicates that carbon sheets not only provide conducting channels by themselves, but they also open new channels in Li2O2.
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Dates
Type | When |
---|---|
Created | 13 years, 1 month ago (July 11, 2012, 6:55 p.m.) |
Deposited | 2 years, 2 months ago (June 23, 2023, 12:49 a.m.) |
Indexed | 3 weeks, 3 days ago (July 30, 2025, 6:59 a.m.) |
Issued | 13 years, 1 month ago (July 9, 2012) |
Published | 13 years, 1 month ago (July 9, 2012) |
Published Online | 13 years, 1 month ago (July 10, 2012) |
Published Print | 13 years, 1 month ago (July 9, 2012) |
@article{Zhao_2012, title={P-type doping of lithium peroxide with carbon sheets}, volume={101}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4733480}, DOI={10.1063/1.4733480}, number={2}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Zhao, Yufeng and Ban, Chunmei and Kang, Joongoo and Santhanagopalan, Shriram and Kim, Gi-Heon and Wei, Su-Huai and Dillon, Anne C.}, year={2012}, month=jul }