Raman Spectroscopy for Understanding of Lithium Intercalation into Graphite in Propylene Carbonated-Based SolutionsReport as inadecuate




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Journal of Spectroscopy - Volume 2015 2015, Article ID 323649, 5 pages -

Research Article

Korea Basic Science Institute, Suncheon Center, Suncheon 540-742, Republic of Korea

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

Received 22 August 2014; Accepted 2 October 2014

Academic Editor: Tifeng Jiao

Copyright © 2015 Yang-Soo Kim 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.

Abstract

Electrochemical lithium intercalation within graphite was investigated in propylene carbonate PC containing different concentrations, 0.4, 0.9, 1.2, 2.2, 2.8, 3.8, and 4.7 mol dm

, of lithium perchlorate, LiClO4. Lithium ion was reversibly intercalated into and deintercalated from graphite in 3.8 and 4.7 mol dm

solutions despite the use of pure PC as the solvent. However, ceaseless solvent decomposition and intense exfoliation of the graphene layers occurred in other solutions. The results of the Raman spectroscopic analysis indicated that contact ion pairs are present in 3.8 and 4.7 mol dm

solutions, which suggested that the presence of contact ion pairs is an important factor that determines the solid electrolyte interphase- SEI- forming ability in PC-based electrolytes.





Author: Yang-Soo Kim and Soon-Ki Jeong

Source: https://www.hindawi.com/



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