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Trimethyl phosphite as an electrolyte additive for high-voltage lithium-ion batteries using lithium-rich layered oxide cathode
- Source :
- Journal of Power Sources. 240:471-475
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- Lithium-rich layered oxide cathode is a promising high-capacity cathode material for high-energy lithium-ion batteries. However, to achieve its high capacity, the development of high-voltage electrolytes is essential. In this work, trimethyl phosphite (TMP) is investigated as an electrolyte additive for high-voltage lithium-ion batteries using Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode. When 1% TMP is introduced into the electrolyte, cycling performance and rate capability of the Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode are improved significantly. The Li/Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cell with the TMP-containing electrolyte exhibits high capacity retention of 81.3% after 100 cycles and good rate capability of 150 mA h g −1 at 5 C and 90 mA h g −1 at 10 C, while the capacity of the cell without TMP is 48 mA h g −1 at 5 C. Based on the measurements on impedance spectra and thermal stability, it is concluded that TMP can effectively deactivate the catalyzing effect of some transition metal ions on the surface of the Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode.
- Subjects :
- Renewable Energy, Sustainability and the Environment
Chemistry
Inorganic chemistry
Trimethyl phosphite
Energy Engineering and Power Technology
chemistry.chemical_element
High voltage
Electrolyte
Cathode
law.invention
Ion
chemistry.chemical_compound
law
Thermal stability
Lithium
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Oxide cathode
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 240
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........f9c66f8abbf1b4d05f080aa9784e2d4f