期刊
ELECTROCHIMICA ACTA
卷 222, 期 -, 页码 830-837出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.11.044
关键词
Li-ion battery; LiMn2O4; over-lithiated oxide cathode; Al2O3; LiF
资金
- Samsung Electronics Co. Ltd.
For Li-ion batteries, AIF(3) coating has been known to modify the over-lithiated layered oxide (OLO) cathodes to produce stable cathodes, but during synthesis procedure, the environment of excess amount of Li metal and free-exposed oxygen may cause the formation of Al2O3 and LiF materials, separately. We investigated the possibility of separated coating formation of Al as Al2O3 and F as LiF from AIF(3) using density functional theory calculation, which suggests a favorable binding affinity of both Al2O3 and LiF phases to the OLO surface to support the preferable formation of coating layer of Al2O3 and LiF. Meanwhile, we found the well-distributed surface modification with the coating layers and a small amount of AIF(3) (
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