Using nanostructures of silicon offers the promise of high storage capacity in lithium-ion batteries. However, contrary to popular belief, excessive use of nanosilicon in anodes presents specific concerns:
1) Low Packing Density: Nanoparticle electrodes may have a low packing density, making it challenging to achieve high bulk energy in batteries.
2) Scalability and Cost: The synthesis of nanosilicon may not be scalable or economical, especially when costly silane gas is used as a feedstock. In a field where cost is a critical metric, this is a significant drawback. 💰
3) Reduced Calendar Life: The calendar life of batteries using silicon nanoparticles can be drastically lower. This is a crucial parameter that is often overlooked during the evaluation of silicon-included batteries.
At Granode, we prioritize the calendar life of silicon-containing batteries in our targets. By using cheap and readily available silicon microparticles, we minimize excessive interaction with the electrolyte, thereby reducing the parasitic reactions common with nanostructures.
Below is the US Department of Energy’s targeted calendar life for some nanosilicon-containing batteries (they have significant gap yet to bridge).
Engineering Specialist/Team Lead Mechanical Design - Advanced Power Products - Battery Modules
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