Solid-state batteries (SSBs) hold immense promise for revolutionizing energy storage due to their potential for high theoretical energy densities. This technology offers significant advantages over traditional lithium-ion batteries, including enhanced current density, faster charging rates, a wider operational voltage window, and improved safety -characteristics that are particularly attractive for electric vehicles and other demanding applications. However, a key challenge in developing high-performance SSBs lies in achieving a balance between maximizing energy density and enabling fast charging rates within composite electrodes. High energy density is achieved by incorporating a high-volume fraction of energy-dense active materials (AM) in the composite electrode. This creates impeded electronic conductive pathways, so carbon additives are incorporated to enhance the electronic conductivity. However, a high AM fraction also reduces the volume available for the solid electrolyte (SE), hindering ion transport pathways. From an energy density perspective, the presence of SE in the cathode is less desirable because it displaces the high-density, chemically active AM particles. Additionally, certain SEs, such as oxides or halides, add significant weight to the cell. On the other hand, fast charging necessitates a well-connected network of SE for rapid ion transport. Effective SE integration in SSBs requires the material to satisfy specific chemical and mechanical criteria. Physically, the SE should exhibit minimal electronic conductivity, high ionic conductivity, likewise as an excellent electrochemical compatibility with the other cell components. Mechanically, the SE needs adequate stiffness and fracture toughness to maintain structural integrity during battery operation. Recent research has made significant progress in addressing sluggish ionic conductivity, a major hurdle in incorporating SEs into next-generation battery designs. Striking a balance between these competing demands is crucial for the successful development of high-performance SSB composite cathodes. - These electrodes comprise a densely packed structure of AM particles surrounded by a conductive SE network for ionic transport, often with additional conductive additives. During lithium ion (de)intercalation, the AM particles undergo volumetric expansion and contraction. This volume change within the confined SSB architecture can generate significant stresses. The rigid solid framework transmits these stresses, leading to a complex coupled chemo-mechanical response that can cause damage within the AM particles, the SE itself, or at the interface between the two. Addressing these mechanical challenges is essential for creating robust composite cathodes in SSBs, where LiNixMnyCo(1-x-y)O2 (NMC) is a promising AM candidate for next-generation battery technologies due to its high theoretical capacity, energy density, structural stability, and inherent rate capability. However, scaling up its production is crucial for commercial viability. Microstructure design plays a critical role in achieving high-performance SSBs, and it offers a powerful approach for scaling up NMCbased battery technology. - Despite significant interest, the scaling-up of SSB manufacturing has only been achieved by the private sector whose expertise remains unpublished and has not been sufficiently covered in literature, as most studies focus on dry processing. - Ates et al. deliver a scalable slurry-based production method for SSB, focusing on one composition for the composite cathode. Their solid-state cell exhibits acceptable cycle performance and specific capacity, with conductive carbon being critical to performance. This study only explores one set of production parameters and operating conditions, yet highlights a promising approach toward the commercial viability of SSBs.