Report on the development of printed electrodes on cell components

5 May. 2022 – This report is a summary of the activities on development of printed electrodes on cell components and and evaluation of their performance. The main objective was to design and realize the novel sensing technology consisting of printed reference electrodes enabling in situ Electrochemical Impedance Spectroscopy (EIS), reliable in operando measurement of the electrolyte conductivity and in addition to proposal targets, accurate monitoring of cathode and anode potentials during the cell operation.

The inks/pastes, containing the materials selected in previous activities, have been formulated to find the optimum ratio of lithium iron phosphate (LFP) and lithium titanate (LTO) as the active materials, polyvinylidene difluoride (PVDF) as the binder and carbon black (CB) and single-/few-layer graphene (SLG/FLG) as the conductive materials. Various printing techniques, including doctor blade coating, screen printing and ink-jet printing have been evaluated for the deposition of the produced inks and pastes in Task 2.1 on different substrates (i.e., Celgard 2500, Al and Cu foil), on which we performed preliminary characterizations.

Figure 1. a) Doctor blade film applicator and b) screen printer used by BDM for the Task 2.2

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The development of printed electrodes on cell components (D2.2)