Comparison of Electrochemical Degradation for Spray Dried and Pulse Gas Dried LiNi_0.5Mn_1.5O₄

The materials were analysed by XRD, FESEM, particle size distribution and BET to achieve an extensive overview of the particles. The electrochemical properties were examined by galvanostatic charging and discharging at different C-rates as well as EIS at different SOCs using LiNi_0.5Mn_1.5O₄/Li coins cells. To improve the electrochemical properties additional grinding and temperature treatments were used. Their influence on the electrochemical properties was investigated by analysing the capacity slippage as well as the electrolyte-, surface film- and the charge transfer resistance. These results will show that the same electrochemical properties can be achieved for the LiNi_0.5Mn_1.5O₄cathode material when changing and upscaling the synthesis methods.

Authors:
Matthias Seidel (1), Muthuraman Kugaraj (1), Kristian Nikolowski (1), Mareike Wolter (1),
Isabel Kinski (2) , Thomas Jähnert (3), and Alexander Michaelis (1,2,4)
1 Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Saxony, Germany
2 Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Hermsdorf, Thuringia, Germany
3 Glatt Ingenieurtechnik, Weimar, Thuringia, Germany
4 Technische Universität Dresden, Dresden, Saxony, Germany

Originally published here.