Experimental Analysis of the Current Distribution between Graphite and SiOx in Blend Electrodes for Lithium-Ion Cells

Title data

Knorr, Julian ; Kufner, Thomas ; Adam, Alexander ; Danzer, Michael A.:
Experimental Analysis of the Current Distribution between Graphite and SiOx in Blend Electrodes for Lithium-Ion Cells.
In: ECS Meeting Abstracts. Vol. MA2023-02 (2023) Issue 2 . - p. 303.
ISSN 2151-2043
DOI: https://doi.org/10.1149/MA2023-022303mtgabs

Official URL:

Abstract in another language

The demand for battery cells with increased energy density without sacrificing performance is driving research into investigating new active electrode materials. The addition of silicon oxide as a second active anode material alongside graphite, referred to as graphite/SiOx blend electrodes, offers a great opportunity to increase the specific capacity of lithium-ion cells. The stable structure of graphite in combination with the high theoretical capacity of silicon represents a promising improvement, for example to increase the driving range of electric vehicles. In this work, the electrochemical behavior during the lithiation and delithiation process of blend electrodes is analyzed. Two custom-made cells are connected in parallel, with each of the cells containing either pure graphite or pure SiOx as the working electrode. Both cells use similar counter electrodes. The experimental setup enables the measurement of the current distribution during charging or discharging of the parallel connection. The observed individual current flow to each cell represents the current flow to each active material. This allows conclusions to be drawn about of the electrochemical processes in a graphite/SiOx blend electrode 1. This work focuses on two effects of blend electrodes: First, the lithiation differences between the active materials with increasing charge rates. Changes in the lithiation distribution between the active materials are observed at higher currents

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrical Energy Systems Faculties > Faculty of Engineering Science > Chair Electrical Energy Systems > Chair Electrical Energy Systems - Univ.-Prof. Dr.-Ing. Michael Danzer Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT:	Yes
DDC Subjects:	600 Technology, medicine, applied sciences 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	12 Dec 2024 08:41
Last Modified:	12 Dec 2024 08:41
URI:	https://eref.uni-bayreuth.de/id/eprint/91388