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High voltage cathodes

In order to achieve high energy density batteries (>250 Wh/kg), MARS-EV will develop nanosized cathode materials having specific energy of 900 Wh/kg (i.e., at least 180 Ah/kg and potential > 4.5 V vs. lithium). Taking into account these considerations, the following phases are going to be developed:

  • LiFexMn(1-x)PO4 with in-situ Carbon coating using sustainable processes.
  • Li-rich NMC with low cobalt content according to a co-precipitation method .
  • Nanosized LiCoPO4 and LiNiPO4, in a single step, by flame spray pyrolysis, to overcome their capacity fading.
  • Fluorinated olivines and silicates will also be studied as long-term option, since current low electronic conductivity and cyclability can be improved by new synthesis processes.
  • Coating (C, AlOx, SiOx) on those nanosized materials will allow the use of aqueous binders for electrode preparation and therefore higher environmentally friendliness and lower costs due to the absence of toxic and volatile solvents during electrode manufacturing process Additionally the coating might be able to prevent metal ion dissolution from the active material to the electrolyte.

Target: 900 Wh/kg

Comparison of energy density of positive electrode materials