10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Flame Aerosol Integrated Role-To-Role Lamination Technique for High Performance Battery Fabrication Procedure
LUTZ MÄDLER, Michael Gockeln, Robert Kun, Suman Pokhrel, University of Bremen, Faculty of Production Engineering
Abstract Number: 168 Working Group: Materials Synthesis
Abstract Li4Ti5O12 (LTO) lithium-ion-batteries with high energy density, efficiency and long life time are powerful sources of energy. However, their main drawback is the large scale production cost both in terms of the material designing and the fabrication procedure. Today, the complex and labor-intensive industrial battery fabrication includes coating slurry-based electrodes, assembly and life-cycle test. Hence, to develop next generation innovative battery technology, new synthesis-fabrication procedures are necessary to ensure excellent performance and reduced cost.1 In our recent work, single and/or double flame aerosol syntheses were utilized to obtain active LTO material and transfer the particles in the dry state on the battery substrate using role-to-role lamination technique.2 During double flame aerosol combustion, (1) a single individual flame was used to obtain LTO (2) second individual flame was used to obtain carbon.3 The two aerosol streams were mixed at a certain point above the flame to obtain homogenous C-LTO mixture. For the single flame synthesis, LTO (without carbon) was sprayed on the collecting unit placed at 60 cm above the flame followed by layer transfer either to the standard and/or flexible substrates using role-to-role laminator. The active material and layers were characterized using XRD, BET, and TEM imaging. The carbon content in the active material was determined using thermogravimetric analysis and Raman spectroscopy. The results of the laminated battery electrodes showed enhanced specific discharge capacities compared to reference electrodes prepared using conventional slurry-based doctor blading technique. The variation in lamination pressure was a key to enhanced electrochemical performance. The solvents and/or binder free layer fabrication technique is expected to become economic and promising technique for its use in the flexible and/or non-flexible substrates in the future.
Reference 1. F. Meierhofer, H. Li, M. Gockeln, R. Kun, T. Grieb, A. Rosenauer, U. Fritsching, J. Kiefer, J. Birkenstock, L. Mädler, S. Pokhrel, ACS Appl. Mater. Interfaces, 2017, 9(43), 37760–37777. 2. M. Gockeln, S. Pokhrel, F. Meierhofer, J. Glenneberg, M. Schowalter, A. Rosenauer, U. Fritsching, M. Busse, L. Mädler, R. Kun, J. Power Sources, 2018, 374, 97-106. 3. F. O. Ernst, H. K. Kammler, A. Roessler, S. E. Pratsinis, W. J. Stark, J. Ufheil, P. Novák, Mater. Chem. Phys. 2007, 101, 372-378.