Silicon Based Anodes
Silicon alloys have the highest specific capacity when used as anode material for lithium-ion batteries, however, the drastic volume change inherent in their use causes formidable challenges toward achieving stable cycling performance. Large quantities of binders and conductive additives are typically necessary to maintain good cell performance.
High Energy Density Silicon Monoxide Anode
We report only 2% (by weight) functional conductive polymer binders without any conductive additives was successfully used with a micron-size silicon monoxide (SiOx) anode material, demonstrating stable and high gravimetric capacity (> 1000 mAh/g) for ~500 cycles and more than 90% capacity retention.
Full cell built with the SiOx anode and LFP cathode shows remarkable stable capacity and impedance.
High Energy Density Si Anode with In Situ Formed Network Structure
Si micron size particles can be used with Si nanoparticles as conductive additive and connection pathways to from stable 3D Si electrode.
Wu, M. Y.; Sabisch, J. E. C.; Song, X. Y.; Minor, A. M.; Battaglia, V. S.; Liu, G., In Situ Formed Si Nanoparticle Network with Micron-Sized Si Particles for Lithium-Ion Battery Anodes. Nano Letters 2013, 13 (11), 5397-5402.