A5018050582- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Extraction and Separation Processes
- Electric Vehicles and Infrastructure
- Recycling and Waste Management Techniques
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Electron and X-Ray Spectroscopy Techniques
- Supercapacitor Materials and Fabrication
- Electric and Hybrid Vehicle Technologies
- Non-Destructive Testing Techniques
- Industrial Gas Emission Control
- Boron and Carbon Nanomaterials Research
- Semiconductor materials and devices
- X-ray Diffraction in Crystallography
- Advancements in Photolithography Techniques
- Electrostatics and Colloid Interactions
- Fiber-reinforced polymer composites
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Advanced Cellulose Research Studies
- Catalysis and Oxidation Reactions
- Organic Electronics and Photovoltaics
- Catalytic Processes in Materials Science
- High voltage insulation and dielectric phenomena
Ford Motor Company (United States)
2012-2018
Ford Motor Company (France)
2013
University of Tennessee at Knoxville
2009-2012
Oak Ridge National Laboratory
2009-2012
We report an in-situ neutron diffraction study of a large format pouch battery cell. The succession Li-Graphite intercalation phases was fully captured under 1C charge-discharge condition (i.e., charge to full capacity in 1 hour). However, the lithiation and dilithiation pathways are distinctively different and, unlike slowing charging experiments with which phase diagram established, no LiC24 found during at rate. Approximately 75 mol. % graphite converts LiC6 lattice dilation as 4%...
Silicon is a promising anode material for lithium-ion battery application due to its high specific capacity, low cost, and abundance. However, when silicon lithiated at room temperature, it can undergo volume expansion in excess of 280%, which leads an extensive fracturing. This thought be primary cause the rapid decay cell capacity routinely observed. Acoustic emission (AE) was employed monitor activity composite electrodes while cycling half-cells using constant current–constant voltage...
Thin film electrodes for lithium ion batteries (LIB) poses several attractive advantages over traditional composite including size and shape constraints, operating temperature range, volumetric energy density. Tin is an candidate LIB anode applications due to its exceptional specific capacity, cascading voltage profile, safety, wide availability, low cost. thin were sputtered onto the current collector of a recently developed in situ X-ray diffraction (XRD) monitored continuously by XRD...
A decrease in the c-lattice parameter was observed Li1.2Co0.1Mn0.55Ni0.15O2 during constant voltage holding at 4.5 V by situ X-ray diffraction. Comparison of magnetic susceptibility data before and after high-voltage hold reveals change average oxidation states transition metal ions process. Transmission electron microscopy studies show spinel reflections with fundamental trigonal spots from particles indicating substantial structural modification. The transformation believed to occur due...
In situ X-ray diffraction of Li(Mn1.5Ni0.5)O4 was performed using a novel electrochemical cell based on coin hardware. The pristine material had cubic spinel structure with Ni2+ oxidation state. As the charged through its 4.75V plateau, transition between spinels Ni2+, Ni3+, and Ni4+ observed. nickel increased, lattice parameter corresponding diminished. During discharge, reversed phase changes until only discharge potential reached plateau at 2.75V tetragonal formed, which upon subsequent...
An in situ acoustic emission (AE) and x-ray diffraction cell for use the study of battery electrode materials has been designed tested. This uses commercially available coin hardware retrofitted with a metalized polyethylene terephthalate (PET) disk, which acts as both an window current collector. In this manner, beryllium its associated cost hazards is avoided. AE sensor may be affixed to face opposite PET order monitor degradation effects, such particle fracture, during cycling. Silicon...
Anode geometry can significantly affect the electrochemical synthesis of conductive polymers. Here, effects anode dimensions on electropolymerization pyrrole are investigated. Band microelectrodes were prepared with widths ranging from 2 to 500 mum. The dimension has a significant effect resulting thickness polymer film. process deviates that predicted by simple mass transfer considerations when electrode less than approximately 20 Polymer film is thinner expected become 10 A mathematical...
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