27 innovations from Bar-Ilan University, available for licensing, co-investment, or spin-out through BIRAD.
Noked Malachi
Silicon-carbon (Si@C) composite anodes are promising candidates for next-generation lithium-ion batteries (LIBs) due to their high theoretical capacity and potential for increased energy density. However, their practical application is limited by large volume changes during lithiation/delithiation, which leads to particle cracking and electrochemical fading. Herein, we report the deposition of hybrid organic/inorganic zincone coatings on Si@C composite anodes by molecular layer deposition (MLD). Using diethylzinc (DEZ) in combination with ethylene glycol (EG) or ethanolamine (EA), conformal nanoscale thin film coatings were produced to act as artificial solid electrolyte interphase (ASEI) layers. Structural and chemical characterization using advanced characterization confirmed a successful growth of ultrathin hybrid zincone thin films while preserving the bulk structure of the Si@C particles. After 100 cycles, ZnEA and ZnEG -coated Si@C electrodes maintained improved capacitances compared to the uncoated electrode, demonstrating improved electrochemical performance of ~20% and ~30%, respectively. Post-cycling analyses further demonstrated reduced structural degradation and cracking formation on the surface of the zincone coated electrodes. The enhanced performance is attributed to the synergistic effect of the hybrid zincone coating, where the inorganic zinc precursor component suppresses electrolyte decomposition and stabilizes the electrode/electrolyte interface, while the organic precursor provides mechanical flexibility to accommodate silicon volume expansion. These findings demonstrate that zincone coatings is an effective method for stabilizing high-capacity silicon-based anodes for advanced next-generation LIBs with improved long-term cycling performance.
Shor Joseph
Ultra-Low-Power Miniaturized BGREF for IOT
Aurbach Doron
Electricity storage cell from renewable energy
