Studies on Compatibility of Sodium 4,5-Dicyano-2-(trifluoromethyl)Imidazolate Based Electrolytes with Novel Cathode Active Materials for Sodium-Ion Batteries
Authors: Szczesna-Chrzan Anna , Ronduda Hubert , Trzeciak Tomasz , Zybert Magdalena , Bitner-Michalska Anna , Żukowska Grażyna Zofia , Niedzicki Leszek , Wieczorek Wladyslaw , Raróg-Pilecka Wioletta , Marcinek Marek 
Published: July 2021

Sodium-ion batteries are promising alternative to lithium-ion batteries and a case of study of many researchers. Researches from Warsaw University of Technology are constantly working on modern electrolytes, including NaPDI and NaTDI, that are promising for application in Na-ion batteries due to the easy synthesis path [1]. Also the new methods of electrodes’ active materials synthesis is essential topic of researches. The modification of the conditions of synthesis using wet impregnation method and different way of introduction of Li+ into active material by using various precursors in synthesis leads to changes of properties of the electrodes [2]. A huge issue for Na-ion batteries is finding a suitable anode. A novel idea is using Microwave Plasma Chemical Vapour Decomposition of SbxOy/C to achieve stable anode [3].

Presented research data is based on electrolytes containing imidazole salts and modern cathodes for Na-ion batteries. Due to the conducted measurement, the conductivity of the electrolytes containing NaTDI salt differ due to the used solvents in 0.75 M concentration solutions: 6.61 mS cm-1 in PC, 11.87 mS cm-1 in EC:DMC (1:1) and 15.56 mS cm-1 in EC:DME (1:1) [4]. The knowledge based on many years of experience in research on Li-ion batteries was essential for sodium analogues synthesis, which has promising properties. The optimization of the electrolytes compositions and adjustment of the cells work parameters with the new type of electrodes were a key issue during electrochemical tests. The presentation will be enriched by the determining parameters of the metallic sodium electrode. Also possible application of electrolytes and electrodes will be shown.

Studies were funded by ENERGYTECH-1 project granted by Warsaw University of Technology under the program Excellence Initiative: Research University (ID-UB).

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[2] Different strategies of introduction of lithium ions into nickel-manganese-cobalt carbonate resulting in LiNi0.6Mn0.2Co0.2O2 (NMC622) cathode material for Li-ion batteries, Magdalena Zybert,, Hubert Ronduda, Anna Szczęsna, Tomasz Trzeciak, Andrzej Ostrowski,Elżbieta Żero, Władysław Wieczorek, Wioletta Rarog-Pilecka, Marek Marcinek, Solid State Ion. 2020, 348, 115273

[3] Microwave Plasma Chemical Vapor Deposition of SbxOy/C negative electrodes and their compatibility with lithium and sodium Hückel salts—based, tailored electrolytes, A. Bitner-Michalska, K. Michalczewski, J. Zdunek, A.Ostrowski, G. Żukowska, T. Trzeciak, E. Żero, J. Syzdek M.Marcinek, Electrochim. Acta 2016, 210, 395-400

[4] Liquid electrolytes containing new tailored salts for sodium-ion batteries, A. Bitner-Michalska, A. Krztoń-Maziopa, G. Żukowska, T. Trzeciak, W. Wieczorek, M. Marcinek
, Electrochim. Acta 2016, 222, 108-115