Nucleation and Growth of Lithium Peroxide in the Li-O2 Battery.
basic_science · Level V
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- Record sourced from PubMed, PMID 26237237.
- Also identified by DOI 10.1021/acs.nanolett.5b02149.
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Abstract
We study the relationship between Li2O2 morphology and the electrochemical performance of the Li-O2 battery using a combination of experiment and theory. Experimental Li-O2 battery discharge curves are accurately captured by a theoretical model in which electrode performance is limited by the nucleation and growth of discrete Li2O2 nanostructures in the cathode. We further show that the characteristic sharp voltage drop widely reported at the end of discharge results from the decrease in electrochemical surface area as Li2O2 covers the cathode surface. Preventing surface nucleation is highlighted as a core strategy for increasing Li-O2 battery capacity.