87 pages ; The pursuit for high-performance lithium-ion batteries (LIBs) has accelerated in response to the rising need for energy storage solutions across a range of industries, including electric vehicles and portable devices. They are now also enabling electrification and grid-scale energy storage. The cathode material used in the first commercial LIB was LiCoO2. However, its limited capacity, high cost, and toxicity of cobalt, there has been a shift toward using LiNixMnyCozO2 (NMC), particularly high-Ni Cathodes like LiNi0.8Mn0.1Co0.1O2 (NMC 811). Major causes for the deterioration of such cathodes are deleterious reactions at the cathode-electrolyte interface and structural instability due to particle cracking and irreversible phase transformations. These in turn lead to reduced cell performance over time. Hence there is a need to improve the stability, long-term performance, capacity, and conductivity of the NMC cathode. Graphene, with its impressive properties like mechanical strength and electrical conductivity, has great potential to tackle these issues. Enhanced mechanical integrity, improved ion transport kinetics, and increased electrical conductivity are just a few benefits of graphene's distinct two-dimensional structure. Additionally, graphene coatings can serve as a barrier to prevent unwanted side effects. The objective of this work is to explore scalable and effective techniques for incorporating and coating graphene in NMC cathode materials. Ball milling-based coating on the NMC active material and electrospray-based graphene coating on the cathode have been investigated. The electrochemical tests reveal improved capacity, coulombic efficiency, rate capability, and enhanced capacity retention in both scenarios.Conventional NMC cathode manufacturing uses organic solvents, which are hazardous to human health and the environment. Water-based procedures get rid of these risks, which lessen their negative effects on the environment and increase worker safety. Water is also less expensive as a ...