Thin film passivation of laser generated 3D micro patterns in lithium manganese oxide cathodes

J. Pröll; R. Kohler; M. Bruns; V. Oberst; P. G. Weidler; S. Heißler; C. Kübel; T. Scherer; R. Prang; H. J. Seifert; W. Pfleging

doi:10.1117/12.2006373

15 March 2013 Thin film passivation of laser generated 3D micro patterns in lithium manganese oxide cathodes

J. Pröll, R. Kohler, M. Bruns, V. Oberst, P. G. Weidler, S. Heißler, C. Kübel, T. Scherer, R. Prang, H. J. Seifert, W. Pfleging

Author Affiliations +

Proceedings Volume 8608, Laser-based Micro- and Nanopackaging and Assembly VII; 860807 (2013) https://doi.org/10.1117/12.2006373
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The increasing need for long-life lithium-ion batteries requires the further development of electrode materials. Especially on the cathode side new materials or material composites are needed to increase the cycle lifetime. On the one hand, spinel-type lithium manganese oxide is a promising candidate to be used as cathode material due to its non-toxicity, low cost and good thermal stability. On the other hand, the spinel structure suffers from change in the oxidation state of manganese during cycling which is also accompanied by loss of active material into the liquid electrolyte. The general trend is to enhance the active surface area of the cathode in order to increase lithium-ion mobility through the electrode/electrolyte interface, while an enhanced surface area will also promote chemical degradation. In this work, laser microstructuring of lithium manganese oxide thin films was applied in a first step to increase the active surface area. This was done by using 248 nm excimer laser radiation and chromium/quartz mask imaging techniques. In a second step, high power diode laser-annealing operating at a wavelength of 940 nm was used for forming a cubic spinel-like battery phase. This was verified by means of Raman spectroscopy and cyclic voltammetric measurements. In a last step, the laser patterned thin films were coated with indium tin oxide (ITO) layers with a thickness of 10 nm to 50 nm. The influence of the 3D surface topography as well as the ITO thickness on the electrochemical performance was studied by cyclic voltammetry. Post-mortem studies were carried out by using scanning electron microscopy and focused ion beam analysis.

Citation Download Citation

J. Pröll, R. Kohler, M. Bruns, V. Oberst, P. G. Weidler, S. Heißler, C. Kübel, T. Scherer, R. Prang, H. J. Seifert, and W. Pfleging "Thin film passivation of laser generated 3D micro patterns in lithium manganese oxide cathodes", Proc. SPIE 8608, Laser-based Micro- and Nanopackaging and Assembly VII, 860807 (15 March 2013); https://doi.org/10.1117/12.2006373

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available