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Journal of Analytical Methods in Chemistry
Volume 2018, Article ID 9231857, 5 pages
Research Article

Electrochemical Solvent Cointercalation into Graphite in Propylene Carbonate-Based Electrolytes: A Chronopotentiometric Characterization

Department of Chemical Engineering, Soonchunhyang University, Asan, Chungnam 336-745, Republic of Korea

Correspondence should be addressed to Soon-Ki Jeong;

Received 30 August 2017; Revised 10 November 2017; Accepted 28 January 2018; Published 6 March 2018

Academic Editor: Larisa Lvova

Copyright © 2018 Hee-Youb Song and Soon-Ki Jeong. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Interfacial reactions strongly influence the performance of lithium-ion batteries, with the main interfacial reaction between graphite and propylene carbonate- (PC-) based electrolytes corresponding to solvent cointercalation. Herein, the redox reactions of solvated lithium ions occurring at the graphite interface in 1 M·LiClO4/PC were probed by chronopotentiometry, in situ atomic force microscopy (AFM), and in situ Raman spectroscopy. The obtained results revealed that high coulombic efficiency (97.5%) can be achieved at high current density, additionally showing the strong influence of charge capacity on the above redox reactions. Moreover, AFM imaging indicated the occurrence of solvent cointercalation during the first reduction, as reflected by the presence of hills and blisters on the basal plane of highly oriented pyrolytic graphite subjected to the above process.