Nanostructured Li2MSiO4 (M=Fe, Mn) Cathode Material for Li-ion Batteries

Abstract

Li-ion batteries have emerged as a highly efficient energy storage device due to its high energy density, low cost, cyclic stability, and have dominated the markets all over the world. The battery comprises of cathode, anode, and electrolyte. The cathode material is crucial as it affects the overall cell performance and is an area of research globally. The suitable anode material is graphite and the electrolyte is gel/solid electrolyte (LiPF6). Recently, orthosilicates (Li2MSiO4; M= Fe, Mn, etc) based cathode material emerged as an alternative of LiCoO2 and LiFePO4 cathodes. The inherent structural stability in silicates is attributed to low cost, presence of Si-O covalent bonding in structure, and availability of two Li+ for transportation. The presence of two Li results in high energy density. So, to further enhance the energy density, researchers have adopted a doping, surface modification approach. Keeping the advantages of orthosilicates based electrode in mind, this chapter explores the fundamentals of battery, followed by characteristics of cathode material and strategy to tune the performance of orthosilicates based electrode. The complete methodology in terms of synthesis and characterization of the orthosilicates electrode has been explained. Finally, an important advancement in the orthosilicates based electrode material in battery performance is summarized followed by future aspects. � 2022 Taylor & Francis Group, LLC.