DC7 will develop different single-ion block copolymer (SIBCs) in close collaboration with LIST and use them to prepare polymer electrolyte membranes for advanced solid-state Li Metal Polymer (LMP) batteries by different processes (including extrusion, UV and/or thermal curing, coagulation bath, etc.). The so developed polymers will be deeply investigated by advanced physico-chemical techniques. In particular the work will include the following main topics: i) investigation of compatibility of the polymer electrolytes with Li metal negative electrode as well as high-voltage cathodes (e.g., NMC, LMFP, LNMO), ii) polymers application both as electrolyte separators and as binders in cathode films, iii) advanced electrochemical characterization (EIS, CV, galvanostatic cycling, in a wide temperature range, and including operando), also correlated with the computational modelling performed in collaboration with UU, iv) optimization of the materials to suppress dendrite growth and to promote the ion diffusion by using specifically selected and/or developed additives, v) characterization of composite electrode/electrolyte networks by thermal, mechanical, and surface analysis, and vi) assembly and testing of laboratory-scale all-solid-state LMP cells with optimized materials and components, with the prospect of scaling up into larger-scale devices at COMAU battery facilities.