Journal
NANO ENERGY
Volume 27, Issue -, Pages 196-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.06.050
Keywords
Li2O activation; High energy composite cathode material; First cycle irreversibility
Categories
Funding
- US Department of Energy from Vehicle Technologies Office, Department of Energy, Office of Energy Efficiency and Renewable Energy [DE-AC02-06CH11357]
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Lithium oxide (Li2O) is activated in the presence of a layered composite cathode material (HEM) significantly increasing the energy density of lithium-ion batteries. The degree of activation depends on the current rate, electrolyte salt, and anode type. In full-cell tests, the Li2O was used as a lithium source to counter the first-cycle irreversibility of high-capacity composite alloy anodes. When Li2O is mixed with HEM to serve as a cathode, the electrochemical performance was improved in a full cell having an SiO-SnCoC composite as an anode. The mechanism behind the Li2O activation could also explain the first charge plateau and the abnormal high capacity associated with these high energy cathode materials. Published by Elsevier Ltd.
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