TY - JOUR
T1 - Factors influencing high voltage performance of coconut char derived carbon based electrical double layer capacitor made using acetonitrile and propylene carbonate based electrolytes
AU - Hu, Changzheng
AU - Qu, Weiguo
AU - Rajagopalan, Ramakrishnan
AU - Randall, Clive
N1 - Funding Information:
This work was supported by State Scholarship Fund of China Scholarship Council (grant 2011845511 ), Natural Science Foundation of Guangxi (No. 2013GXNSFBA019230 ), the Project of Guangxi Education Department (No. 201203YB087 ), the Science Foundation of Guilin , (No. 20120112-3 ) and the Project for Doctor in Guilin University of Technology . The authors would also like to acknowledge Center for Dielectric studies (CDS) at Pennsylvania State University and NSF ASSIST program for providing financial support. We would like to thank Materials Characterization Laboratory (MCL) at Penn State for helping us with XPS measurements.
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2014/12/25
Y1 - 2014/12/25
N2 - Symmetric EDLCs made using high purity carbon electrodes derived from coconut char were tested using 1 M Tetraethylammonium hexafluorophosphate dissolved in two different solvents namely acetonitrile and propylene carbonate. The cell voltage of the capacitor made using propylene carbonate can be extended to 3.5 V and it exhibited good cycling and thermal stability upto 70 °C while the voltage was limited to below 3.0 V in acetonitrile. XPS analysis of the positive and negative electrodes of EDLCs post cycling showed that the primary degradation products were related to ring opening reactions in propylene carbonate based electrolytes while water played a key role in degradation of acetonitrile based EDLCs.
AB - Symmetric EDLCs made using high purity carbon electrodes derived from coconut char were tested using 1 M Tetraethylammonium hexafluorophosphate dissolved in two different solvents namely acetonitrile and propylene carbonate. The cell voltage of the capacitor made using propylene carbonate can be extended to 3.5 V and it exhibited good cycling and thermal stability upto 70 °C while the voltage was limited to below 3.0 V in acetonitrile. XPS analysis of the positive and negative electrodes of EDLCs post cycling showed that the primary degradation products were related to ring opening reactions in propylene carbonate based electrolytes while water played a key role in degradation of acetonitrile based EDLCs.
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U2 - 10.1016/j.jpowsour.2014.08.043
DO - 10.1016/j.jpowsour.2014.08.043
M3 - Article
AN - SCOPUS:84907219308
SN - 0378-7753
VL - 272
SP - 90
EP - 99
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
