לוח שנה משולב

One of the most important technological challenges that modern society faces today, relates to the electric vehicle revolution and the chance to widely use electrochemical propulsion for ground transportation. In order to meet this challenge we have to develop rechargeable batteries with very high energy density. To date, Li ion batteries are the power sources of choice for EV. However, the most relevant systems are graphite-LiFePO4 (or Li[MnNiCo]O2) which enable a too short driving distance between charges of full EV. In this talk, we will review and discuss options for high energy density battery systems (excluding the valid option of fuel cells). There are high voltage cathodes : Li[MnNi]2O4 spinel and LiCoPO4, high capacity Li2MnO3-LiMO2 cathodes and high capacity Li-Si anodes which can take Li ion battery technology further in terms of energy density, but to where ? What is the realistic horizon here ? May be with such electrodes materials we stretch these systems too far beyond their thermodynamic (meta) stability ? Do we have better ,exotic electrodes’ materials that can bring us to a breakthrough ? Another options are Li-sulfur and Li-air batteries. Can they be really developed to be rechargeable ? We will review limitations and chances.
A relevant option is to use for full EV applications state-of-the-art Li ion batteries with electrochemical range extenders such as primary metal air batteries with effective recycling technologies.
The above points will be discussed in this talk, in light of extensive work on these topics at BIU.

What is the probability that an unusual event occurs in a many-body system during a specified time T? We address this question for classical diffusive lattice gases and consider formation of a macroscopic void in an initially homogeneous gas. We employ macroscopic fluctuation theory which not only yields, in some cases, the desired probability, but also predicts the most likely gas density history leading to the void formation