STRUCTURAL AND ELECTROCHEMICAL STUDY OF HIGH VOLTAGE CATHODE MATERIAL, Li2MnO3, AND IT’S REDOX REACTION ANALYSIS

Abstract

Li-ion batteries have become indispensable in our modern, technology-driven world, powering a wide array of devices. As the demand for high-energy-density batteries continues to surge, there is a need to explore advanced cathode materials. In this regard, Li2MnO3 has emerged as a highly promising contender for high-voltage (>4.5 V) cathodes in Li-ion batteries. Li2MnO3 offers several advantages over conventional cathode materials such as LiCoO2 and intercalation-type compounds. Notably, Li2MnO3 possesses a remarkable high-voltage capability, which is crucial for achieving enhanced energy density in batteries. Furthermore, it exhibits favourable characteristics, including non-toxicity and ease of synthesis, making it an attractive alternative for Li-ion battery technology. In this study, Li2MnO3 was synthesized using a solid-state route, enabling its detailed characterization. X-ray Diffraction (XRD) analysis was employed to investigate the crystallographic properties of the synthesized material. The obtained XRD patterns were subjected to rigorous structural analysis using the Rietveld refinement technique. By applying Scherrer's formula to the XRD peaks, the crystallite size of Li2MnO3 was determined to be approximately 37.05 nm. To evaluate the electrochemical performance of Li2MnO3 as a cathode material, Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) analyses were performed. EIS measurements provided valuable insights into charge transfer resistance and ion diffusion behavior, while CV analysis revealed distinct high-voltage peaks around 4.5 V, accompanied by supplementary low-voltage peaks at approximately 3.7 V. These electrochemical findings affirm the potential of Li2MnO3 as a high-voltage cathode material for Li-ion batteries. This study presents a comprehensive exploration of the synthesis, characterization, and electrochemical analysis of Li2MnO3 as a high-voltage cathode material for Li-ion batteries. Its exceptional attributes make it a promising candidate for next-generation battery technology. Ongoing research and development efforts in this area will undoubtedly contribute to the advancement of Li-ion batteries, enabling the creation of more efficient and high-performance energy storage solutions.