The present invention generally relates to materials for electrochemical cells, e.g., for use in batteries such as lithium-ion batteries, and other applications. For example, certain embodiments of the present invention provide a composition for an aqueous slurry or an aqueous slurry composition for the manufacture of an electrode for an electrochemical cell. The slurry, in certain embodiments, comprises a combination of ionomer, binder, conducting additive, electroactive materials, and water. The ionomer, in some embodiments, includes a polymer backbone, one or more anionic substituents (which may be in the backbone and/or in one or more pendant groups), and one or more cations.