Professor Emanuel Peled and Professor Dina Golodnitsky

Tel Aviv University is now Israel's largest and most comprehensive institution of higher learning, with over 30,000 students studying across nine faculties, 29 schools and 98 departments. TAU's rise as a world-renowned university in a mere fifty years demonstrates the power of vision and dedication. The School of Chemistry at Tel-Aviv University prides itself on being one of the most influential institutes in the world of chemistry research. The publications emanating from the School have among the highest impact on global chemical research, as demonstrated by the International Scientific Information - ISI, USA (Citation Impact Index). The School is known for its excellence in teaching. In addition to the quality of its outstanding staff, the School also has strong instrumentation support. The School offers many research opportunities for students who wish to continue their studies toward further advanced degrees in Chemical Physics, Organic Chemistry and Physical Chemistry. The scientific interest spans many areas including supramolecular chemistry, organic and organometallic synthesis and material science, magnetic resonance imaging, electrochemistry, marine chemistry, advanced cluster spectroscopy and chemistry, sophisticated analytical chemistry, quantum mechanical computations, fractal chemistry, molecular dynamics and many more.

Researchers and students of the group of Prof. E. Peled and Prof. D. Golodnitsky at TAU's School of Chemistry are responsible for some of the greatest advancements made in recent decades, with regard to power generation, energy storage and miniature sources of power.

Their groundbreaking innovations include:

  • The revolutionary SEI model for lithium batteries, which transformed the entire field of alkali batteries in 1979, ultimately enabling the development of a viable lithium battery. Approximately 200,000 studies presented since that time, and 75% of all relevant research papers published today, are based on this pioneering work.
  • The world's first 3D lithium-ion microbattery, which has maintained its critical edge over all others for over a decade. The microbattery, which delivers the highest power values per area ever recorded, consists of a perforated silicon wafer with 10,000-30,000 through holes, each containing a complete nanoscale lithium battery.
  • Innovative fuel cells, based on novel catalysts, fuels and membranes. These highly efficient and relatively inexpensive systems are capable of storing vast quantities of energy, and then transforming them into electric power.
  • Sodium-air batteries, as well as critical improvements for lithium-air and lithium-sulfur batteries. All these innovative types of batteries are lighter, less expensive, more powerful and longer-lasting than the lithium-ion batteries used today.
  • Highly conductive solid polymer electrolytes, enabling the development of safer lithium batteries that contain no inflammable solvents, and may be used, for example, in electric vehicles.

Achievements & applications

High-quality lithium batteries based on our scientists' SEI model are used today to power all mobile devices –including smartphones, laptops, iPads, digital cameras and more, as well as

electric vehicles. Looking to the future, the sodium-air, lithium-air & lithium sulphur batteries currently under development in our labs will provide improved performance, enabling electric vehicles to cover distances of up to 500 km without recharging. In addition, our advanced energy technologies have served as the basis for the establishment of three startup ventures, developing a range of novel solutions: fuel cells for storing vast quantities of energy produced by solar and wind farms; a device for measuring the time remaining in lithium batteries; and 3D lithium–ion microbatteries powering state-of-the-art security and medical devices – such as heart pacers and ultra-sensitive sensors

In TEPS consortium we successfully collaborate with Tadiran Ltd and Elbit Ltd in development of new materials for supercapacitors and Li-ion batteries.

Development and characterization of high energy supercapcitors and pseudocapacitors

1. Development of electrolyte mixtures based on Ionic Liquids, ternary ammonia salts and organic solvents for low-temperature high energy supercapacitors.

2. Introduction of lead species undergoing faradaic reactions into a standard aqueous supercapacitor design. 

3. Development of new types of electrolytes for further enhancement of specific capacity in pseudo-supercapacitors. 

 

Development and characterization of high energy Silicon anodes for LIBs

Silicon has a theoretical energy capacity 11 times higher than graphite, commonly used as  anode material in LIBs today. However, its main drowback is  short cycling life and poor stability, 

We at TAU have developed stable Silicon-carbon composite anodes, based on silicon nanoparticles coated with carbon and strengthened by carbon nanotubes. These anodes have given capacity values almost 3 times that of graphite after 180 cycles, and our synthesis methods are all easily scalable and environmentally friendly.

Selected publications:

Advanced Multiphase Silicon-Based Anodes for High-Energy-Density Li-Ion Batteries.Goldshtein, K., Freedman, K., Schneier, D., Burstein, L., Ezersky, V., Peled, E. and Golodnitsky, D., 2015Journal of The Electrochemical Society162(6), pp.A1072-A1079.