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Entwicklung einer Zelle für in situ-Ramanspektroskopie an Lithium-Ionen-Batterien

Warth, Frieder (2016) Entwicklung einer Zelle für in situ-Ramanspektroskopie an Lithium-Ionen-Batterien. Master's, Universität Stuttgart.

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Abstract

Electrolytes and electrodes play an important role for further improvements of lithium-ion batteries in concerning lifetime, safety and increase in the specific energy. To observe changes in the materials during operation in situ-measurements are used. Thereby it is possible to observe changes inside the batterie, while charging and discharging. This work reports the construction of an in situ-cell case for raman spectroscopy and the measurements with a commercial graphite electrode. Therefore a window of silica glass was build into a common batterie testcase. The objectiv of the raman spectrometer was orientend on the electrode with the help of an optical fiber and a superhead by Horiba®. The Laser was focused precisely with a translation stage. With this setting a high energy graphit electrode by Customcells® was analyzed. An electrolyte by Sigma-Aldrich® with a composition of 1:1 vol% EC:DEC with 1M LiPF6 was used. Based on the changes in the raman spectrum the lithium intercalation in the electrode was observed. For further informations, for example the decompostion products of the electrolyte, a Signal enhancing is necessary. Surface enhanced raman spectroscopy (SERS) with the use of silver nanopowder has been performed. Due to the signal overlap of the graphite and the surface stabilizer of the nanopowder, no changes in the raman signal were observed.

Item URL in elib:https://elib.dlr.de/109675/
Document Type:Thesis (Master's)
Additional Information:Betreuer: Miriam Steinhauer
Title:Entwicklung einer Zelle für in situ-Ramanspektroskopie an Lithium-Ionen-Batterien
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Warth, FriederFrieder.Warth (at) dlr.deUNSPECIFIED
Date:2 May 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:78
Status:Published
Keywords:Raman Spektroskopie Lithium-Schwefelbatterie Graphit-Anode
Institution:Universität Stuttgart
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Batteries) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Wagner, Dr.rer.nat. Norbert
Deposited On:15 Dec 2016 15:29
Last Modified:31 Jul 2019 20:06

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