| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Electrochemical Fabrication of Microstructure Engineered, Highly textured, Ultra-thick Ceramic Oxide Films for High Volumetric Energy Density Electrochemical Energy Storage |
| Author(s) |
Arghya Patra, Paul V. Braun |
| On-Site Speaker (Planned) |
Arghya Patra |
| Abstract Scope |
Anisotropic ceramic oxides exhibit drastically different physico-chemical properties along different crystallographic directions. However, translation of crystal-level anisotropy to a length scale of hundreds of microns in a film form factor has been elusive in ceramics important for electrochemical energy storage. State-of-the-art synthesis of layered transition metal oxide cathodes for Li-ion battery involves prolonged high temperature (>700°C), thus generating untextured powders. Employing a molten hydroxide-based electrodeposition method, we demonstrate textured LiCoO2 films with controllable in-and-through-plane orientation, grain size, grain type and grain distribution. The highly textured, ultra-dense (>95%) electrodeposits exhibit low tortuosity and fastest electron and Li ion conducting pathways oriented normal to the current collector. Such microstructure engineered cathodes can perform even at ultrahigh thickness of ~200 µm (areal capacity of ~15 mAh/cm2) in comparison to ~50 µm for conventional slurry cast cathodes (areal capacity of ~3 mAh/cm2, 80% dense), a fourfold increase in areal capacity and volumetric energy density. |