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III.B.5 Solid Polymer Batteries for Electric Drive Vehicles (SEEO) Bruce Mixer, NETL Project Manager Grant Recipient: Seeo, Inc. Hany Eitouni 3906 Trust Way Hayward, CA 94545 Phone: (510) 782-7336; Fax: (510) 782-7337 E-mail: heitouni@seeo.com Start Date: October 2011 Projected End Date: September 2014 Objectives Develop, build, and test high-voltage solid polymer electrolyte cells with an energy density ≥ 500 Wh/l that meet USABC performance, lifetime and safety standards. Develop a robust commercialization plan that evaluates key risks associated with high- volume manufacturing and estimates cell production costs. Technical Barriers This project addresses the following technical barriers: Cycling of Li metal anodes. Electrolyte stability at >4V cathode potentials. Mechanical performance of high-voltage cathode materials within solid polymer architecture. Interfacial performance of layered polymer electrolyte system. Technical Targets Evaluation of high-voltage cathode materials within polymer electrolyte system, including electrochemical stability and mechanical properties. Development of polymer materials stable to potentials of high voltage cathode materials. Scalable, repeatable synthetic method for polymers Robust, prismatic pouch cell design. Test and evaluation to USABC performance and abuse tolerance requirements. Accomplishments In 2013, the project focused on: Development of polymeric materials to achieve target voltage stability, conductivity and mechanical properties, including evaluation of conductive salts for high-voltage stability in solid-state cells. Investigation of coating techniques to stabilize high-voltage cathode materials. Development and analysis of treated Li foil anodes using commercially-scalable production processes. Introduction Achieving DOE performance targets for high energy cells requires new materials and approaches to electrochemical energy storage devices. Seeo proposes to meet these targets using high-capacity Li anodes and high-voltage cathode materials contained within a solid polymer electrolyte system which, in turn, enhances the lifetime, efficiency and safety of vehicle batteries. Approach The project will be executed in three consecutive phases: Phase I: Baseline Evaluation and Material Synthesis – Deliver 2Ah baseline cells to establish stability and performance of solid polymer electrolyte cells and perform initial synthesis and characterization of high- voltage materials Phase II: Material Formulation and Scale-Up – Iterate on design of high-voltage materials, cycle laboratory-scale cells to isolate polymer-cathode couples and deliver interim design cells for technical review Phase III: Cell Fabrication and Testing – Monitor stability and performance of large-area cells, execute internal performance and abuse tests and deliver final design cells for independent verification Results High-voltage stable polymer materials and conductive salts demonstrated the requisite Energy Storage R&D 80 FY 2013 Annual Progress ReportPDF Image | Advanced Battery Development
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