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Full-Text Articles in Physical Sciences and Mathematics
Nanostructured Lithium Iron Silicate/Carbon Composites As Cathode Material For Next Generation Of Lithium-Ion Batteries, Ajay Kumar
Wayne State University Dissertations
Lithium iron silicate (Li2FeSiO4) has the potential as cathode material for next generation lithium ion batteries because of its high specific theoretical capacity (330 mA h g-1), low cost, environmental benignity, and improved safety. However, itsintrinsically poor electronic conductivity and slow lithium ion diffusion in the solid phase limits its applications. To address these issues, we studied mesoporous Li2FeSiO4/C composites synthesized by sol-gel (SG) and solvothermal (ST) methods using tri-block copolymer (P123) as carbon source and structure directing agent. The Li2FeSiO4/C (ST) composites show improved electrochemical performance compared to Li2FeSiO4/C (SG). At C/30 rate, Li2FeSiO4/C (ST) delivered the discharge capacity …
Nonlinear Dynamic Studies Of Pattern-Forming And Biomedical Systems, Doaa Taha
Nonlinear Dynamic Studies Of Pattern-Forming And Biomedical Systems, Doaa Taha
Wayne State University Dissertations
Nonlinear phenomena are ubiquitous in nature and in almost every discipline of science. Various nonlinear dynamic theories are being developed to investigate a wide range of complex nonlinear systems. In this work, we study two types of nonlinear phenomena. The first type involves understanding and controlling the properties and dynamics of two-dimensional (2D) material systems. We develop a binary phase field crystal (PFC) model which simultaneously addresses diffusive dynamics of large-scale systems and resolves material microstructures, and apply the model to the study of two material systems. (1) We use this PFC model to investigate the self assembly of 2D …