About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Implementing a Free-Standing Electrode Design in Conversion Electrodes for Improving Interfacial Contact |
| Author(s) |
Jordan Sweeney, Heather Slomski, Douglas Sides, Melissa Popeil, Nicholas Krienke, Lydia Meyer, Andrew Colclasure, Kimberly Scott, Eve Mozur |
| On-Site Speaker (Planned) |
Jordan Sweeney |
| Abstract Scope |
Due to their high efficiency and declining cost, lithium-ion batteries are a promising option for grid-level energy storage. However, current lithium-ion battery energy densities are approaching the capacity limit of the cathode; new chemistries offer opportunities to increase this capacity and meet the increasing global energy demand. Conversion cathodes, typically transition metal oxides and fluorides, can provide 2-4 times the capacity of conventional cobalt oxide-derived intercalation cathodes. One of the primary challenges in implementing conversion electrodes is their volume changes of up to 200%, leading to delamination and decreased contact at the interface. The free-standing design discussed herein can mitigate reduced contact, as only pressure within the cell (~0.1 MPa) maintains contact, rather than both pressure and adhesion in a typical tape-cast. Free-standing designs also allow removal of the current collector and increases the energy density by 140% while maintaining the overall cell capacity. |