DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Interfaces and Thin Films III (joint session CPP, DS)

CPP 37.12: Talk

Wednesday, March 18, 2015, 12:30–12:45, C 243

Improved Electrolyte-Additive Induced Performance of Graphite Anodes for Lithium-Ion Batteries – Electrochemical and Electrode Surface Studies — •Anna Dimitrova1, Andre Müller2, Svetlozar Ivanov2, Marcel Himmerlich1, Anja Eisenhardt1, Andreas Bund2, and Stefan Krischok11Technische Universität Ilmenau, Institut für Physik and Institut für Mikro- und Nanotechnologien, Germany — 2Technische Universität Ilmenau, Fachgebiet Elektrochemie und Galvanotechnik, Germany

The electrolyte decomposition is a crucial stage in the formation cycle of Li–ion batteries. It results in the formation of a protective passivation layer on the graphite electrode surface, called solid electrolyte interphase (SEI). SEI formation competes with Li ion incretion and its chemical composition and structure determines the battery cell life time. To control this process we designed a phosphorous enriched electrolyte, which enhances the rate performance and the capacity retention of the Li–ion battery compared to a non-modified electrolyte. In order to study charge-discharge cycles in the batteries and to analyze the SEI composition, we combined electrochemical studies with X-ray Photoelectron Spectroscopy (XPS). In this work the influence of the electrolyte on the SEI composition was investigated and a correlation between chemical structure and electrochemical characteristics of the Li–ion battery will be discussed.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin