ALD coating for micro- and nanosized particles
Atomic layer deposition (ALD) is shifting from being merely a research tool for coating porous substrates and particles to becoming a viable and industrial production tool for a number of specific products, including heterogeneous catalysts, nanofillers for polymer composites and thermal fillers for electronics. In lithium-ion batteries, for example, ALD has been applied in several applications. Beneq ALD is pleased to be at the forefront of this development and capable of serving its customers in this particular growing hi-tech field.
Taking ALD into particulate matter
Combining conformal coatings with particulate and porous substrates creates completely new opportunities to modify, e.g., the diffusion properties of materials. ALD has turned out to be a truly enabling technology for particle coating, and is already a proven means in the following applications:
- fastening micro- and nano-sized particles to a substrate
- applying diffusion and corrosion barriers for metal surfaces
- controlling the diffusion properties of the surface of particles
- surface passivation in general
- tailoring the composition of porous materials
- doping porous bulk material
Due to the “bottom up” film growth mechanism of ALD, most coatings are naturally pinhole-free. This feature is especially valuable in barrier and passivation applications. Major improvement in barrier properties can be achieved in a film thickness regime as low as of 10 nm.
Download Li-ion battery white paper (pdf).