Abstract
The effects of the coatings Al2O3, LiAlOx, ZrO2, TiO2, AlPO4, and LiPON and of the electrolyte additives 3-hexylthiophene and lithium difluoro (oxalato)borate (LiDFOB) on the voltage fade phenomenon in 0.5Li2MnO 3·0.5LiNi0.375Mn0.375Co 0.25O2 cathodes were investigated. Cells containing these materials or additives were cycled according to a standard protocol at room temperature between 2.0 and 4.7 V vs. Li+/Li. As expected, the cells containing either an additive or a coated cathode displayed less capacity loss than cells containing an uncoated cathode and no additive. The voltage fade phenomenon was quantified in terms of changes in the average cell voltage (Wh/Ah). The results indicate that, within experimental error, all of the coatings and additives produced little-to-no effect on voltage fade.
Original language | English |
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Pages (from-to) | 509-514 |
Number of pages | 6 |
Journal | Journal of Power Sources |
Volume | 249 |
DOIs | |
State | Published - Mar 1 2014 |
Externally published | Yes |
Funding
The work at Argonne National Laboratory was performed under the auspices of the U.S Department of Energy (DOE), Office of Vehicle Technologies, under Contract No. DE-AC02-06CH11357. J. W. Elam and X. Meng were supported as part of the Center for Electrical Energy Storage: Tailored Interfaces, an Energy Frontier Research Center funded by the DOE, Office of Science, Office of Basic Energy Sciences . Robert Tenent and Chunmei Ban thank Dr. Peter Faguy for funding under the Applied Batteries Research (ABR) program from the Vehicles Technology Office of the DOE Office of Energy Efficiency and Renewable Energy (EERE) under DOE Agreement #24282. The research at Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the DOE under contract DE-AC05-00OR22725, is sponsored by the Vehicle Technologies Program for the EERE.
Keywords
- Coatings
- Composite cathode materials
- Electrolyte additives
- Lithium-ion batteries
- Voltage fade