Haider, Adawiya J.Chahrour, Khaled M.Addie, Ali J.Abdullah, Ahmed Q.Jubu, Peverga R.AL-Saedi, Safaa I.Naje, Asama N.2024-09-292024-09-2920240921-51071873-4944https://doi.org/10.1016/j.mseb.2023.117116https://hdl.handle.net/20.500.14619/5155In this work, a graphene-enhanced LiCo0.525Ni0.475O2 (LCNOG) cathode was synthesized by self-propagating high-temperature synthesis and the effects of annealing at 650-850 degrees C were investigated. Sharper X-ray diffraction peaks showed enhanced crystallization with an increase in average crystallite size from 28 nm to 56 nm after annealing at 850 degrees C. LCNOG annealed at 850 degrees C delivered a high capacity of over 2030 J compared to 1280 J, with a near ideal coulombic efficiency of 99.5 % and long cycle stability. The acceleration of kinetics is evidenced by more favorable redox peak positions in voltammetry and a 5-fold lower interfacial resistance in electrochemical impedance spectroscopy. The improved performance is due to the larger grain size, higher crystallinity, increased conductivity and graphene-induced diffusion facilitation. The relationship between crystallinity and cathodic properties provides critical insight into cathode design. The exceptional performance achieved by tailoring crystallinity through annealing makes LCNOG a potential material for high-voltage cathodes for lithium-ion technology.eninfo:eu-repo/semantics/closedAccessGrapheneLithium -ion batteriesCathode materialsElectrochemical performanceArticle10.1016/j.mseb.2023.1171162-s2.0-85180789053Q2300WOS:001144493500001Q2