We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Making Room for Silicon: Including SiO x in a Graphite-Based Anode Formulation and Harmonization in 1 Ah Cells.
- Authors
Landa-Medrano, Imanol; Urdampilleta, Idoia; Castrillo, Iker; Grande, Hans-Jürgen; de Meatza, Iratxe; Eguia-Barrio, Aitor
- Abstract
Transitioning to more ambitious electrode formulations facilitates developing high-energy density cells, potentially fulfilling the demands of electric car manufacturers. In this context, the partial replacement of the prevailing anode active material in lithium-ion cells, graphite, with silicon-based materials enhances its capacity. Nevertheless, this requires adapting the rest of the components and harmonizing the electrode integration in the cell to enhance the performance of the resulting high-capacity anodes. Herein, starting from a replacement in the standard graphite anode recipe with 22% silicon suboxide at laboratory scale, the weight fraction of the electrochemically inactive materials was optimized to 2% carbon black/1% dispersant/3% binder combination before deriving an advantage from including single-wall carbon nanotubes in the formulation. In the second part, the recipe was upscaled to a semi-industrial electrode coating and cell assembly line. Then, 1 Ah lithium-ion pouch cells were filled and tested with different commercial electrolytes, aiming at studying the dependency of the Si-based electrodes on the additives included in the composition. Among all the electrolytes employed, the EL2 excelled in terms of capacity retention, obtaining a 48% increase in the number of cycles compared to the baseline electrolyte formulation above the threshold capacity retention value (80% state of health).
- Subjects
ANODES; AUTOMOBILE industry; ASSEMBLY line methods; SILICON; ELECTRODES; CARBON nanotubes
- Publication
Energies (19961073), 2024, Vol 17, Issue 7, p1616
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en17071616