In this work, we have developed novel tuneable low-fluorine membranes based on the copolymerisation of functional lithium sulphonamide monomers, such as lithium 1-[3-(methacryloyloxy)propylsulfonyl]-1-(trifluoromethylsulfonyl)imide (LiMTFSI) and lithium 4styrenesulfonyl(trifluoromethylsulfonyl)imide (LiSTFSI) and common methacrylate alkyl monomers. These membranes were prepared via a facile low-energy UV curing process which produced CEMs with low fluorine content. The use of lithium sulphonamide functional monomers provides the polymeric membrane with lithiophilic exchange groups to boost Li-ion conduction, while also increasing hydrophilicity and water uptake which facilitates complete wetting by the aqueous Li-salt solution. The introduction of an alkyl-based methacrylate co-monomer such as methyl, isobornyl and butyl methacrylates (MMA, IBMA and BMA) enhances the mechanical properties and controls water uptake of the resulting copolymeric membranes. A wide range of co-monomer ratios was explored for suitable properties (mechanical stability, water uptake and ionic exchange capacity) for LiOH production, and three candidate membranes were selected for further characterisation. Li-ion conductivity and transport number values were derived from electrochemical impedance spectroscopy and open-circuit voltage measurements. Li-ion diffusion coefficients were measured using solid-state NMR to underpin differences between the dry and swollen membrane transport behaviours. The best candidate membranes were subsequently evaluated for their performance in LiOH production under a set baseline condition using a 2-compartment electrolytic cell pre-assembled with the candidate membrane. Focus was given to the electrodialytic production of LiOH from Li2SO4 which is the intermediate product before the final conversion to LiOH in hard-rock mineral processing albeit this technology is also readily applicable to brine processing. The performance of the candidate membrane was also benchmarked against state-of-the-art commercial CEMs in terms of LiOH production rate, energy efficiency, and Li + /Na + selectivity.