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Electrolyte-cathode interactions in 5-V lithium-ion cells
- Source :
- Journal of Solid State Electrochemistry
- Publication Year :
- 2017
-
Abstract
- The electrolyte/electrode interactions on the anode side of a lithium-ion cell and the formation of the solid electrolyte interphase (SEI) have been investigated intensively in the past and are fairly well understood. Present knowledge about the reactions on the cathode side and the resulting cathode electrolyte interphase (CEI) is less detailed. In this study, the electrolyte/electrode interactions on the surface of the high-voltage cathode material LiNi0.5Mn1.5O4 (LNMO), both bare and FePO4-coated, were investigated. The gases evolving upon first time charging of the system were investigated using a GC/MS combination. The degradation products included THF, dimethyl peroxide, phosphor trifluoride, 1,3-dioxolane and dimethyl difluor silane, formed in the GC’s column as its coating reacts with HF from the experiments. Although these substances and their formation are in themselves interesting, the absence of many degradation products which have been mentioned in the existing literature is of equal interest. Our results clearly indicate that coating a cathode material can have a major influence on the amount and composition of the gaseous decomposition products in the formation phase.
- Subjects :
- Lithium-ion batteries
Cathodes
High voltage cathode
Inorganic chemistry
LiNi0.5Mn1.5O4
chemistry.chemical_element
Decomposition products
02 engineering and technology
Electrolyte
engineering.material
010402 general chemistry
Electrochemistry
01 natural sciences
law.invention
Degradation
Electrolytes
chemistry.chemical_compound
Coating
Coatings
law
Solid electrolyte interphase
Naturvetenskap
General Materials Science
Electrical and Electronic Engineering
Electrodes
Cath-ode materials
Lithium-ion cells
Electrolyte cathode
Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Silane
Cathode
0104 chemical sciences
Anode
Trifluoride
engineering
Solid electrolytes
Lithium
Natural Sciences
0210 nano-technology
Degradation products
Subjects
Details
- ISSN :
- 14328488
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Electrochemistry
- Accession number :
- edsair.doi.dedup.....fcb1a9a76a505239741d7c32d39fc5ba
- Full Text :
- https://doi.org/10.1007/s10008-017-3701-5