This deliverable addresses progress on the manufacture of the positive electrode, separator and negative electrode strips, work carried out in tasks T4.2.2 and T4.2.3 for the realization of 1 Ah prototypes. First cathodes have been casted at lab-scale using two kind of mixing (ball mill and high shear disperser) and doctor blade. Two binder/solvent pairs have been tested: PIB/IBIB:Decane and HNBR/pxylene. It has been observed that p-xylene is highly volatile and dries too quickly. It was therefore replaced by anisole, a less toxic solvent. Capacities of 150 mAh.g-1 have been observed in the best cases with these sulfide cathodes containing commercial materials. However, reproducibility problems and high variability of results limit the studies. These performances are much lower than the nominal capacity of NMC811. The Cerpotech NMC has been integrated in place of the commercial NMC. Although the mixing and coating steps were well, the first electrochemical tests showed sudden polarization. A first batch of solid electrolyte containing LPSCl:LLZO (80:20) has been coated on aluminum foil with PIB binder. Its ionic conductivity is ten times lower than a layer of LPSCl without LLZO. An initial test of compressibility has been performed. A thickness of 15 to 20 µm has been finally obtained after densification of a 50 µm layer under a pressure of 127 MPa. Finally, Li metal with artificial SEI (ASEI) layer on it will be manufactured by PVD roll-to-roll.
Manon et al. (Fri,) studied this question.