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*Corresponding Author: E-mail: cbarnold@princeton.edu, phone: 1-609-258-0250 Current address, Department of Materials Science and Engineering, Stanford University
 

Summary: *Corresponding Author: E-mail: cbarnold@princeton.edu, phone: 1-609-258-0250
Current address, Department of Materials Science and Engineering, Stanford University
LiCoO2 Texturing by Laser Induced Forward Transfer for Printed
Microbatteries
Ashwin C. Atre
and Craig B. Arnold*
Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ
08544
ABSTRACT
Laser induced forward transfer (LIFT) is used to print Li-ion battery electrodes. We show a preferred orientation of
LiCoO2 particles in the (003) direction relative to non-laser transferred materials. While the laser energy does not alter
the degree of orientation, the number of passes and transfer distance both have a significant influence on the observed
texturing. We use a geometric argument based on the arrangement of plate-like particles on the substrate to explain the
observations. When the plate-like particles encounter a perfectly flat substrate, they are able to align flat, causing (003)
domains parallel to the substrate to be over 30 times more predominant than either (101) and (104) domains. From this
maximum degree of orientation subsequent passes decrease the overall texturing of the samples as transferred particles
encounter increasingly rough surfaces. At larger transfer distances, the areal density of particles reaching the substrate
decreases, resulting in increased available substrate surface area and therefore more predominant particle orienting.
Keywords: Li-ion microbattery, Lithium cobalt oxide, crystal orientation, LIFT, laser direct write, laser printing, battery
electrode

  

Source: Arnold, Craig B. - Department of Mechanical and Aerospace Engineering, Princeton University

 

Collections: Engineering; Materials Science