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Improved electrochemical properties of BiOF-coated 5 V spinel Li[Ni(0.5)Mni(1.5)]O-4 for rechargeable lithium batteries
- Issue Date
- Apr-2010
- Publisher
- Elsevier BV
- Keywords
- 5 V spinel; BiOF coating; Cathode; HF scavenger; Lithium batteries
- Citation
- Journal of Power Sources, v.195, no.7, pp 2023 - 2028
- Pages
- 6
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Journal of Power Sources
- Volume
- 195
- Number
- 7
- Start Page
- 2023
- End Page
- 2028
- ISSN
- 0378-7753
1873-2755
- Abstract
- The electrochemical properties of BiOF-coated 5 V spinel Li[Ni0.5Mn1.5]O-4 were investigated at elevated temperatures (55 degrees C). As observed by scanning and transmission electron microscopy, BiOF nanolayers with similar to 10 nm thickness were coated on the surface of Li[Ni0.5Mn1.5]O-4. The BiOF coating layer protected the surface of the active materials from HF generated by the decomposition of LiPFG in the electrolyte during electrochemical cycling. The dissolution of transition metal elements was also suppressed upon cycling. Therefore, the capacity retention of the BiOF-coated Li[Ni0.5Mn1.5]O-4 was obviously improved compared to the pristine Li[Ni0.5Mn1.5]O-4 at 55 degrees C.
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Related Researcher
- Sun, Yang Kook
- COLLEGE OF ENGINEERING (DEPARTMENT OF ENERGY ENGINEERING)