High-voltage electrolytes based on adiponitrole for Li-ion batteries

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DOIResolve DOI: http://doi.org/10.1149/1.3023084
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Journal titleJournal of the Electrochemical Society
PagesA60A65; # of pages: 6
SubjectAdiponitrile; Li-Ion Batteries; High-Voltage Electrolytes; melting point; electrochemically stable electrolytes; ethylene carbonate; graphite anode
AbstractAdiponitrile, CN[CH2]4CN, ADN, was evaluated as both a solvent and cosolvent in safer and more electrochemically stable electrolytes suitable for high energy and power density Li-ion batteries. An electrochemical investigation of its electrolyte solution with the Li(CF3SO2)2N, LiTFSI, salt showed a wide electrochemical window of 6 V vs Li+/Li. The high melting point and the incompatibility of ADN with graphite anode required the use of ethylene carbonate (EC) as a cosolvent. The resultant EC:ADN electrolyte solutions showed ionic conductivities reaching 3.4 mS/cm, viscosities of 9.2 cP, and an improved resistance to aluminum corrosion up to 4.4 V, all at 20°C. Li-ion batteries incorporating graphite/LiCoO2 electrodes were assembled using EC:ADN electrolyte mixture containing 1 M LiTFSI and 0.1 M LiBOB as a cosalt, and discharge capacities of 108 mAh/g with very good capacity retention were obtained. AC impedance spectra of the batteries recorded as a function of charging and cycling indicated the presence of a stable solid electrolyte interface.
Publication date
PublisherElectrochemical Society
AffiliationNRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE); National Research Council Canada
Access conditionavailable
Peer reviewedYes
NRC number50893
NPARC number8934252
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Record identifier74e531a4-e26e-4a2b-90f5-17061355d213
Record created2009-10-02
Record modified2016-05-09
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