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Title: 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:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1366476
Patent Number(s):
9,692,086
Application Number:
14/506,158
Assignee:
The Regents of The University of California LBNL
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. doi:. 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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