Laser Patterning of High‐Mass‐Loading Graphite Anodes for High‐​Performance Li‐​Ion Batteries

Dubey, Romain; Zwahlen, Marcel-David; Shynkarenko, Yevhen; Yakunin, Sergii; Fuerst, Axel; Kovalenko, Maksym V; Kravchyk, Kostiantyn V. (2021). Laser Patterning of High‐Mass‐Loading Graphite Anodes for High‐​Performance Li‐​Ion Batteries Batteries & Supercaps, 4(3), pp. 464-468. Wiley 10.1002/batt.202000253

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Given the ongoing efforts to build Li-ion batteries with higher volumetric energy and power densities, the research on enhancing Li-ion transport within compressed high-mass-loading electrodes at fast cycling conditions is imperative. In this work, we show that the rate capability of graphite electrodes with high areal capacity of 4.5 mAh cm2 and density of 1.79 g cm3 (15% of porosity) can be considerably improved by laser patterning, namely by the fabrication of arrays of vertically aligned channels serving as diffusion paths for rapid Li-ion transport. Resultant laser patterned graphite electrodes delivered enhanced volumetric capacity as compared to that of non-patterned electrodes (450 vs. 396 mAh cm3 at C/2 rate). The reduction of the total steady-state concentration drop within the graphite electrodes after their patterning was also assessed.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Engineering and Computer Science > Intelligente industrielle Systeme (I3S) > I3S / Prozessoptimierung in der Fertigung
Name:	Dubey, Romain; Zwahlen, Marcel-David; Shynkarenko, Yevhen; Yakunin, Sergii; Fuerst, Axel; Kovalenko, Maksym V and Kravchyk, Kostiantyn V.
Subjects:	Q Science > QD Chemistry T Technology > TJ Mechanical engineering and machinery
ISSN:	2566-6223
Publisher:	Wiley
Projects:	[UNSPECIFIED] SCCER HaE WP2
Language:	English
Submitter:	Michael Stalder
Date Deposited:	09 Dec 2020 12:16
Last Modified:	01 Feb 2022 02:30
Publisher DOI:	10.1002/batt.202000253
Additional Information:	This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
ARBOR DOI:	10.24451/arbor.13762
URI:	https://arbor.bfh.ch/id/eprint/13762