Compatibility of lithium salts with solvent of the non-aqueous electrolyte in Li-O-2 batteries

Title
Compatibility of lithium salts with solvent of the non-aqueous electrolyte in Li-O-2 batteries
Author
선양국
Keywords
LI-AIR BATTERIES; CARBONATE ELECTROLYTES; POLYMER ELECTROLYTE; ELECTROCHEMISTRY; CHALLENGES; NANOWIRES; STABILITY; CHEMISTRY
Issue Date
2013-04
Publisher
Royal SOC Chemistry
Citation
Physical Chemistry Chemical Physics, 2013, 15, P.5572-5581
Abstract
The stability of lithium salts, especially in the presence of reduced oxygen species, O-2 and H2O (even in a small amount), plays an important role in the cyclability and capacity of Li-O-2 cells. This combined experimental and computational study provides evidence that the stability of the electrolyte used in Li-O-2 cells strongly depends on the compatibility of lithium salts with solvent. In the case of the LiPF6-1NM(3) electrolyte, the decomposition of LiPF6 occurs in the cell as evidenced by in situ XRD, FT-IR and XPS analysis, which triggers the decomposition of 1NM3 solvent due to formation of HF from the decomposition of LiPF6. These reactions lead to degradation of the electrolyte and cause poor cyclability of the cell. The same reactions are not observed when LiTFSI and LiCF3SO3 are used as the lithium salts in 1NM3 solvent, or LiPF6 is used in TEGDME solvent.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2013/CP/c3cp50500f#!divAbstracthttp://hdl.handle.net/20.500.11754/52925
ISSN
1463-9076
DOI
10.1039/c3cp50500f
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE