A synthesis toward sequence-controlled multiblock glycopolymers, presenting a mannopyranoside (Man) glyco­(oligoamide) block followed by a poly­(ethylene glycol) (PEG) (M̅ n of 6 kDa) block, is shown. Therefore, monodisperse and sequence-defined glyco­(oligoamide) macromonomers derived from solid phase synthesis (SPS) are polymerized with dithiol-functionalized PEG via thiol–ene coupling (TEC) in a step-growth fashion. For the polymerization, a novel building block introducing a norbornene moiety is developed which is used for end-functionalization of the glyco­(oligoamide) macromonomers. As a highly reactive alkene moiety in photoinduced TEC, this gives access to X̅ n of up to 45. A total of 12 glyco­(oligoamide)–PEG multiblock copolymers with maximum M̅ n of 200 kDa are obtained and subjected to a series of purification steps decreasing overall dispersity. In different binding studies toward model lectin Concanavalin A, despite their high number of Man ligands, we see rather weak binding of glycopolymers that we attribute to the introduction of higher molecular weight PEG blocks.

As the need for green energy storage increases, the development of solid-state sodium batteries is pushed forward. Main advantage towards lithium-ion batteries is that sodium is an element that is abundant and ubiquitous. Recent studies have developed sodium ion conducting solid electrolytes with a conductivity of 4∙10-2 S cm-1, which exceeds the ionic conductivity of lithium ion conductors at room temperature. As solid electrolytes are immobile, the possibility of using different electrolytes as separator and catholyte according to their useful properties presents itself. Nasicon (Na3.4Zr2Si2.4P0.6O12) material as a ceramic has a high ionic conductivity however lacks mechanical flexibility. Sulfur electrolytes such as Na2.9Sb0.9W0.1S4 predominate with their high elastic modulus and at the same time high ionic conductivity, however, show major electro-chemical instabilities in contact with the electrodes. The halide type electrolytes show their strength in term of stability, but have not reached relevant ionic conductivities yet. The combination of different electrolytes and the electrochemical implications are presented in this study. Chemical, electrochemical and mechanical stabilities are tested and monitored in full and symmetric sodium tin alloy cells.