About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Ultra-Thick Electrodes for High Energy and Power Density Lithium-ion Batteries |
Author(s) |
Jonghyun Park, Tazdik Plateau, Hiep Pham |
On-Site Speaker (Planned) |
Jonghyun Park |
Abstract Scope |
Thickening electrodes is one effective way to increase active material content in electrodes to achieve high energy density and reduce cost of batteries. However, limitation of charge transport in thick electrodes and the generation of mechanical stresses result in poor performance and eventual cell failure. In this work, a new electrode fabrication process, referred to as µ-casting, is developed, which enables ultra-thick electrodes that address the trade-off between specific capacity and areal/volumetric capacity. The process facilitates a short diffusion path structure that minimizes intercalation-induced stress, improving energy density and cell stability. We also investigated the issues with structural integrity, porosity and paste rheology, and analyzed mechanical properties due to external force. The µ-casting enables an ultra-thick electrode that effectively utilizes active materials compared to conventional thick electrodes, allowing high-mass loading, 40% higher specific capacity and 30% higher areal capacity after 200 cycles, high C-rate performance and longer cycle life. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, |