Mechanical Structuring of Lithium‐Ion Battery Electrodes Using an Embossing Roller

Highly performing lithium‐ion batteries are essential for the electrification of the transport sector. However, the two performance criteria, high power density and high energy density, inversely correlate with each other via the mass loading of the electrodes. To achieve high charging and dischargi...

Full description

Saved in:

Bibliographic Details
Published in:	Energy technology (Weinheim, Germany) Vol. 11; no. 5
Main Authors:	Keilhofer, Josef, Schaffranka, Leon Wolfgang Ferdinand, Wuttke, Amy, Günter, Florian Josef, Hille, Lucas, Dorau, Filip Adam, Daub, Rüdiger
Format:	Journal Article
Language:	English
Published:	Weinheim Wiley Subscription Services, Inc 01-05-2023
Subjects:	Batteries Discharge electrode designs electrode structuring Electrodes Embossing Laser ablation Lithium Lithium-ion batteries microembossing Transportation industry
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Highly performing lithium‐ion batteries are essential for the electrification of the transport sector. However, the two performance criteria, high power density and high energy density, inversely correlate with each other via the mass loading of the electrodes. To achieve high charging and discharging rates at high energy densities, structuring of electrodes is a proven method. Currently, structures are mostly realized by laser ablation, which comes along with material loss and low process rates. Herein, a concept for electrode structuring through mechanical embossing in a high‐throughput roll‐to‐roll process is elaborated. Different integration options are described and the challenges are discussed. To provide a proof of concept, a hand‐operated embossing device is built and used to structure graphite anodes. In a rate capability test, an increase in discharge capacity at medium C‐rates by up to 14.3% is observed. Within this work, an alternative concept for structuring lithium‐ion battery electrodes through mechanical embossing in a high‐throughput roll‐to‐roll process is elaborated. Different integration options are described and discussed. To provide a proof of concept, a hand‐operated embossing device is built and used to structure graphite anodes. The structured anodes are optically and electrochemically analyzed.
ISSN:	2194-4288 2194-4296
DOI:	10.1002/ente.202200869