The Effect of Methyl Acetate, Ethylene Sulfate, and Carbonate Blends on the Parasitic Heat Flow of NMC532/Graphite Lithium Ion Pouch Cells

2018 ◽  
Vol 165 (5) ◽  
pp. A867-A875 ◽  
Author(s):  
S. L. Glazier ◽  
Jing Li ◽  
Xiaowei Ma ◽  
L. D. Ellis ◽  
J. P. Allen ◽  
...  
Keyword(s):  
Heat Flow ◽  
Methyl Acetate ◽  
Lithium Ion ◽  
Ethylene Sulfate

Measuring the Parasitic Heat Flow of Lithium Ion Pouch Cells Containing EC-Free Electrolytes

2017 ◽  
Vol 164 (4) ◽  
pp. A567-A573 ◽  
Author(s):  
S. L. Glazier ◽  
R. Petibon ◽  
J. Xia ◽  
J. R. Dahn
Keyword(s):  
Heat Flow ◽  
Lithium Ion

scholarly journals Optimising 3-phenyl-1,4,2-dioxazol-5-one as an electrolyte additive for Lithium-Ion cells

2020 ◽  
Vol 50 (2) ◽  
pp. 373
Author(s):  
Toren Hynes
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Lithium Ion Batteries ◽  
Carbon Dioxide Emissions ◽  
Supply And Demand ◽  
Lithium Ion ◽  
Electrolyte Additive ◽  
Lithium Ion Cells ◽  
Reduce Carbon Dioxide ◽  
Ethylene Sulfate

An effective method to reduce carbon dioxide emissions is to switch to renewables for energy generation and transportation. Since current sources of renewable energy, such as wind and solar, are intermittent, it is essential to find ways to store energy to match supply and demand. If vehicles are to be powered by renewable energy, they need portable energy storage. Currently, lithium-ion batteries are one of the most viable solutions for energy storage. Extending the lifespan of lithium-ion batteries is the goal of this research, carried out with Dr. David Hall of Dr. Jeff Dahn’s research group at Dalhousie University in late 2017. We developed and tested a chemical compound, 3-phenyl-1,4,2-dioxazol-5-one (PDO), which greatly improves the lifespan of lithium-ion batteries. One percent of this by weight in a cell’s electrolyte, along with two percent ethylene sulfate, will extend a battery’s lifespan more than three-fold over those containing conventional vinylene carbonate-containing electrolyte.  

A Raman spectral study of solvation and ion association in the systems LiAsF6/CH3CO2CH3 and LiAsF6/HCO2CH3

1991 ◽  
Vol 69 (11) ◽  
pp. 1766-1773 ◽  
Author(s):  
Zhongyi Deng ◽  
Donald E. Irish
Keyword(s):  
Methyl Acetate ◽  
Methyl Formate ◽  
Ion Pairs ◽  
Lithium Ion ◽  
Ion Association ◽  
Ion Solvation ◽  
Lithium Cation ◽  
Different Types ◽  
Raman Spectral ◽  
Contact Ion Pairs

The structure of the solvated lithium cation in methyl acetate (MA) solutions has been investigated using Raman spectroscopy. Two bands at 844 and 864 cm−1 have been assigned to two different types of MA: the former is from the bulk solvent and the latter arises from MA molecules solvating the lithium cation. From measurement of changes in intensity of these bands with increasing salt concentration a solvation number of four for Li+ in MA has been inferred. Changes in the Raman bands at ca. 1740 cm−1 suggest that solvation occurs through the carbonyl group. Evidence for contact ion pairing between Li+ and AsF6− is also presented. An equilibrium between solvent-shared ion pairs and contact ion pairs is proposed for which an equilibrium constant is estimated. The system LiAsF6/methyl formate (MF) is similar in structure. Key words: Raman, ion pair formation, lithium and hexafluoroarsenate ions, methyl acetate and formate, lithium ion solvation.

Determination of the Time Dependent Parasitic Heat Flow in Lithium Ion Cells Using Isothermal Microcalorimetry

2014 ◽  
Vol 118 (51) ◽  
pp. 29533-29541 ◽  
Author(s):  
L. E. Downie ◽  
S. R. Hyatt ◽  
A. T. B. Wright ◽  
J. R. Dahn
Keyword(s):  
Heat Flow ◽  
Lithium Ion ◽  
Time Dependent ◽  
Isothermal Microcalorimetry ◽  
Lithium Ion Cells
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