Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 157, Issue 4, Pages A536-A543Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3298903
Keywords
chemical exchanges; electrochemical electrodes; electrochemistry; electrolytes; lithium compounds; secondary cells; sodium compounds
Funding
- NGK
- JST progressive engineering development research programs, Japan
Ask authors/readers for more resources
To improve the thermal stability of lithium- and sodium-ion batteries, the room-temperature molten salts LiBF(4)/1-ethyl-3-methyl imidazolium tetrafluoroborate (EMIBF(4)) and NaBF(4)/EMIBF(4) were used as ionic liquid (IL) electrolytes instead of flammable carbonate-type organic electrolyte solvents. To avoid cathodic decomposition of the IL electrolytes, a symmetric cell configuration with Na Superionic CONductor (NASICON)-type A(3)V(2)(PO(4))(3) (where A is Li or Na) as both cathode and anode was tried in a coin-type cell (type 2320). As a result, both the polyanionic-based Li(3)V(2)(PO(4))(3) (LVP) as well as Na(3)V(2)(PO(4))(3) (NVP) symmetric cells using organic electrolytes were found to operate as secondary batteries and exhibited satisfactory electrochemical performances. The substitution of the organic electrolytes by the appropriate IL electrolytes in both cases resulted in the reduction in the first discharge capacities. However, the IL-based cells revealed better cyclability and a more stable behavior at elevated temperatures. The obtained electrochemical behavior of the symmetric cells was confirmed by the complex impedance measurements at 25 and 80 degrees C. In addition, the thermal stability of LVP and NVP with the IL electrolytes was also examined.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available