Exploratory Synthesis of Oxyanion-Based Cathode Materials for Li-ion Batteries
Department
Chemistry
Major
Chemical Engineering, Chemistry
Research Advisor
Choudhury, Amitava
Advisor's Department
Chemistry
Funding Source
Missouri S&T Opportunities for Undergraduate Research Experiences (OURE) Program; University of Missouri Research Board
Abstract
Lithium ion batteries are a popular choice in hybrid and plug-in electric vehicles. There is a growing demand to discover new cathode materials for Li-ion batteries, which are cheap, safe, and provide high power density. Lithium containing olivine-structure of iron phosphate, LiFePO4, has already emerged as a safe and cheap cathode material. We are exploring the existence of new compositions and structures with oxyanions (PO43- and BO33-) and transition metals. A ternary phase diagram was explored using varying amounts of BO33-, Li+, and PO4 3-, with fixed amounts of F-, H2O, and Fe2+ under hydrothermal conditions. This exploration has yielded several new structures among which three have been identified as potential cathode materials: Fe5(H2O)4(HPO4)2(PO4)2, Li2Fe(PO4)(HPO4), and LiFeF0.5(OH)0.5PO4. Currently these materials are being analyzed for Li-ion conduction and Li+/H+ exchange properties. Preliminary results of our investigation will be presented.
Biography
Patrick Stanley is a junior dual majoring in Chemistry and Chemical Engineering. He is currently the Treasurer for the Rolla Catholic Newman Center and a member of the W. T. Schrenk Society and the American Institute of Chemical Engineers. Apart from his studies and research, Patrick spends time working out and teaching taekwondo, and geocaching. Originally from Auxvasse, Missouri, Patrick has an acute interest in plants and all things agricultural, as evidenced by his involvement in the National FFA Organization and he desires to apply his knowledge to the field agriculture after graduation.
Research Category
Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Location
Upper Atrium/Hallway
Presentation Date
07 Apr 2010, 9:00 am - 11:45 am
Exploratory Synthesis of Oxyanion-Based Cathode Materials for Li-ion Batteries
Upper Atrium/Hallway
Lithium ion batteries are a popular choice in hybrid and plug-in electric vehicles. There is a growing demand to discover new cathode materials for Li-ion batteries, which are cheap, safe, and provide high power density. Lithium containing olivine-structure of iron phosphate, LiFePO4, has already emerged as a safe and cheap cathode material. We are exploring the existence of new compositions and structures with oxyanions (PO43- and BO33-) and transition metals. A ternary phase diagram was explored using varying amounts of BO33-, Li+, and PO4 3-, with fixed amounts of F-, H2O, and Fe2+ under hydrothermal conditions. This exploration has yielded several new structures among which three have been identified as potential cathode materials: Fe5(H2O)4(HPO4)2(PO4)2, Li2Fe(PO4)(HPO4), and LiFeF0.5(OH)0.5PO4. Currently these materials are being analyzed for Li-ion conduction and Li+/H+ exchange properties. Preliminary results of our investigation will be presented.
