Zeinab Sanaee

Title : Prelithiation of silicon based nanomaterial anode for lithium ion battery application

Abstract:

Lithium ion batteries are widely used for providing energy of mobile electronic devices. Graphite is a traditional anode material that has been used in almost all of the commercialized Lithium ion batteries. It gives a specific capacity of 372 mAh/g for Lithium storage. But there are multiple better choices for storing Lithium that propose significantly higher specific capacities. As an example, Silicon based materials such as SiO2 can be mentioned. SiO₂ material can offer a huge specific capacity of 1965 mAh/g, as the anode of Lithium ion batteries.  Due to this high Lithium storage ability, large volume change occurs in this electrode material during insertion and extraction of Lithium, which may lead to cracking and destroying of the electrode, loosing the contact to the current collector and finally deteriorating the performance of battery. Use of nanomaterials instead of bulk material, can significantly solve this problem. In addition, If we insert Lithium in the active material of the battery, before its cycling, which is called prelithiation, a further enhancement in the performance is expected. Here, we have fabricated anode electrode of the battery using SiO2 nanomaterial mixed with Graphite, and assembled a Lithium ion battery half cell with this electrode. Next, a prelithiation was performed on the SiO2 nanoparticle containing electrode, and the resulted anode material was investigated. This electrode has a great potential for high performance Lithium ion batteries.  
Audience take away:

• Introduction to Lithium ion batteries will be explained
• Silicon based anode material is introduced as the pioneer anode in the modern Lithium ion batteries
• Prelithiation is explained which is an enhancing step toward having better Lithium ion batteries
• These topics are part of the emerging technologies in the Lithium ion battery field, that can help the audience to be familiar with these topics and expand their research or teaching.
• This research subject can lead to having higher performance Lithium ion batteries.

Biography:

Zeinab Sanaee received her BSc, MSc and PhD in 2005, 2009, and 2011, all in Electrical Engineering from University of Tehran. Then she started working at University of Tehran as an assistant professor in 2012. Her research interest is focused on fabrication of Lithium ion batteries and supercapacitors, and synthesis and implementation of nanostructured materials for their performance improvement.  She is also director of “Energy Storage Laboratory”, where “Fabrication of Silicon based Lithium ion batteries” is followed as one of the main research subjects of the lab.