期刊
JOURNAL OF POWER SOURCES
卷 249, 期 -, 页码 509-514出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.10.035
关键词
Lithium-ion batteries; Composite cathode materials; Voltage fade; Coatings; Electrolyte additives
资金
- U.S Department of Energy (DOE), Office of Vehicle Technologies [DE-ACO2-06CH11357]
- DOE, Office of Science, Office of Basic Energy Sciences
- Vehicles Technology Office of the DOE Office of Energy Efficiency and Renewable Energy (EERE) [24282]
- Vehicle Technologies Program for the EERE [DE-ACO5000R22725]
The effects of the coatings Al2O3, LiAIO(5), ZrO2, TiO2, AlPO4, and LiPON and of the electrolyte additives 3-hexylthiophene and lithium difluoro (oxalato)borate (LiDFOB) on the voltage fade phenomenon in 0.5Li(2)Mn0(3)center dot 0.5LiNi(0.375)Mn(0.375)Co(0.25)O(2) 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. (C) 2013 Elsevier B.V. All rights reserved.
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