[9p-E202-1~15] 1.4 Energy conversion, storage, resources and environment

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)English Presentation

[9p-E202-3] Structural Evolution and Crystallographic Analysis of K+ Doped Li1-xKxNi1/3Mn1/3Co1/3O2 (x = 0.00, 0.02, 0.04, 0.06, and 0.08 %)Cathode Materials Synthesized by the Pechini Method

〇(D)Roshan Fernando¹, T. H. N. G. Amaraweera², K.M.D.C. Jayathilaka³, L. S. R. Kumara⁴, R.P. Wijesundera³, H.W.M.A.C. Wijayasinghe¹ (1.NIFS, 2.Uva Wellassa Univ., 3.Univ. of Kelaniya, 4.JASRI)

Keywords:

NMC materials,K doping,Li-ion battery

The study investigates the electrochemical performance of Li1-xKxNi1/3Mn1/3Co1/3O2 (NMC333) cathodes, highlighting the influence of potassium doping Li1-xKxNi1/3Mn1/3Co1/3O2 on its structural properties. Materials with varying K+ concentrations (x = 0.00, 0.02, 0.04, 0.06, and 0.08) were synthesized via the Pechini method. XRD confirmed a single-phase layered hexagonal structure without impurities. The optimal K+ content of 4% improved electron density distribution, as indicated by better peak splitting and lower stacking fault probability along specific crystallographic directions. Increased K+ content resulted in higher lattice strain and enhanced structural order. SEM analysis showed a shift from rounded to polygonal particle shapes, with an average size of 0.81μm at 4% K+ content. Overall, the substitution of Li1-xKxNi1/3Mn1/3Co1/3O2 enhances the structural stability and electrochemical performance of NMC333 as a cathode for lithium-ion batteries.