Back to Search
Start Over
Enhanced electrochemical performances via introducing LiF electrolyte additive for lithium ion batteries.
- Source :
-
Ceramics International . Oct2019, Vol. 45 Issue 14, p18106-18110. 5p. - Publication Year :
- 2019
-
Abstract
- High working potential and temperature put nonnegligible threats on electrochemical stability and safety performance of lithium ion batteries (LIBs). In this paper the carbonate-based electrolyte is modified with LiF additive to improve the comprehensive properties of cells in which a metallic lithium anode is paired with a LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode under the extreme conditions of high cut-off potential, high current rate or even high temperature (55 °C). The tests of self-discharge behavior and chronoamperometry present that the introduction of LiF additive contributes to relieving self-discharge of cells and side reactions on the surface of electrodes. The cells with 100 ppm exhibit the improved cyclic performance (81.6% of initial capacity 195.4 mAh gā1), high-rate capability (150.6 mAh gā1 at 8 C) and high-temperature performance. Additionally after 100 cycles over 3.0ā4.6 V, the results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) on electrodes reveal that the cathodes in LiF-reinforced electrolyte retain more stable layered structure and more intact spherical secondary particles than those in original electrolyte. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 45
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 137890999
- Full Text :
- https://doi.org/10.1016/j.ceramint.2019.05.216