70 0

Protective organic additives for high voltage LiNi0.5Mn1.5O4 cathode materials

Title
Protective organic additives for high voltage LiNi0.5Mn1.5O4 cathode materials
Author
김동원
Keywords
Ionic liquid; Spinel LiNi0.5Mn1.5O4; Organic additives; Solid electrolyte interphase
Issue Date
2014-04
Publisher
Elsevier B.V
Citation
Electrochimica Acta, 10 April 2014, 125, 497-502
Abstract
Dimethylacetamide (DMAc) and triethyl(2-methoxyethyl)phosphonium bis(trifluoromethylsulfonyl)imide (TEMEP-TFSI) are investigated as protective additives for high voltage LiNi0.5Mn1.5O4 cathode materials. The capacity retention of Li/LiNi0.5Mn1.5O4 cells is improved by adding these additives to the base liquid electrolyte. The self-extinguishing time and DSC results demonstrate that the addition of TEMEP-TFSI to the base electrolyte is effective in reducing the flammability of the electrolyte solution and improving the thermal stability of the LiNi0.5Mn1.5O4 electrode. TEM and XPS analyses of the LiNi0.5Mn1.5O4 electrode reveal that DMAc and TEMEP-TFSI participate in the formation of a stable solid electrolyte interphase (SEI) on the LiNi0.5Mn1.5O4 electrode, and the resulting SEI layer effectively suppresses electrolyte decomposition.
URI
https://www.sciencedirect.com/science/article/pii/S0013468614002187http://hdl.handle.net/20.500.11754/51677
ISSN
0013-4686
DOI
10.1016/j.electacta.2014.01.124
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > 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