Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes
Abstract
A homologous series of cyclic carbonate or propylene carbonate (PC) analogue solvents with increasing length of linear alkyl substitutes were synthesized and used as co-solvents with PC for graphite based lithium ion half cells. A graphite anode reaches a capacity around 310 mAh/g in PC and its analogue co-solvents with 99.95% Coulombic efficiency. Cyclic carbonate co-solvents with longer alkyl chains are able to prevent exfoliation of graphite when used as co-solvents with PC. The cyclic carbonate co-solvents of PC compete for solvation of Li ion with PC solvent, delaying PC co-intercalation. Reduction products of PC on graphite surfaces via single-electron path form a stable Solid Electrolyte Interphase (SEI), which allows the reversible cycling of graphite.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1366476
- Patent Number(s):
- 9692086
- Application Number:
- 14/506,158
- Assignee:
- The Regents of The University of California
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- DOE Contract Number:
- ACO2-05CH11231
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Oct 03
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Liu, Gao, Zhao, Hui, and Park, Sang-Jae. Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes. United States: N. p., 2017.
Web.
Liu, Gao, Zhao, Hui, & Park, Sang-Jae. Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes. United States.
Liu, Gao, Zhao, Hui, and Park, Sang-Jae. Tue .
"Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes". United States. https://www.osti.gov/servlets/purl/1366476.
@article{osti_1366476,
title = {Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes},
author = {Liu, Gao and Zhao, Hui and Park, Sang-Jae},
abstractNote = {A homologous series of cyclic carbonate or propylene carbonate (PC) analogue solvents with increasing length of linear alkyl substitutes were synthesized and used as co-solvents with PC for graphite based lithium ion half cells. A graphite anode reaches a capacity around 310 mAh/g in PC and its analogue co-solvents with 99.95% Coulombic efficiency. Cyclic carbonate co-solvents with longer alkyl chains are able to prevent exfoliation of graphite when used as co-solvents with PC. The cyclic carbonate co-solvents of PC compete for solvation of Li ion with PC solvent, delaying PC co-intercalation. Reduction products of PC on graphite surfaces via single-electron path form a stable Solid Electrolyte Interphase (SEI), which allows the reversible cycling of graphite.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 27 00:00:00 EDT 2017},
month = {Tue Jun 27 00:00:00 EDT 2017}
}
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