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Influence of Cycling Profile, Depth of Discharge and Temperature on Commercial LFP/C Cell Ageing: Cell Level Analysis with ICA, DVA and OCV Measurements

  • This paper uses several techniques to monitor the ageing of commercial LiFePO4 cells, which are cycled at 55 °C and −20 °C at various depths of discharge. Ageing at lower depth of discharge leads to higher capacity fading, as compared to higher depth of discharge. The highest capacity fading is observed using 50% depth of discharge for cycling at 55 °C, while the lowest capacity fading is observed for the cells aged at 100% depth of discharge when cycled at −20 °C. Using incremental capacity analysis and differential voltage analysis the capacity fading is monitored and underlying ageing mechanisms are described. The loss of lithium inventory and the loss of active material, especially on the cathode side, are the major degradation mechanisms for the cells. The first incremental capacity analysis peak of the discharge process can be used in our case to predict remaining life and cell capacity.

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Metadaten
Author:Matthias Simolka, Jan-Frederik Heger, Nikolaus Traub, Hanno Kaess, Kaspar Andreas Friedrich
DOI:https://doi.org/https://doi.org/10.1149/1945-7111/ab9cd1
ISSN:1945-7111
Parent Title (English):Journal of the Electrochemical Society
Publisher:IOP Publishing
Place of publication:Bristol
Document Type:Article
Language:English
Year of Completion:2020
Release Date:2021/01/14
GND Keyword:Lithium-Eisensulfid-Batterie; Elektrochemie
Volume:167
Page Number:11
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access?:frei verfügbar
Relevance:Peer reviewed Publikation in Master Journal Liste (Clarivate)
Licence (German):License LogoVeröffentlichungsvertrag ohne Print-on-Demand