Associate Professor Sajid Hussain Siyal
Dawood University of Engineering and Technology, Karachi, Pakistan
Title: Eco-Friendly Composite Electrolytes for Lithium Metal Batteries Supporting Sustainable Energy and Responsible Consumption
Abstract:
Smart lithium-metal batteries (LMBs) are highly promising energy storage devices due to their high capacity and low negative electrochemical potential. However, their practical applications are limited by unstable electrolyte–electrode interfaces, narrow electrochemical windows, and safety concerns. Herein, we present a sustainable strategy to develop dual ceramic-based electrolytes with enhanced energy density and improved safety for LMBs. Lanthanum titanate (LTO) and aluminum titanium phosphate (LTP) were integrated into a flexible Li⁺- interpenetrating polyethylene oxide network via a curable system, producing free-standing electrolyte films with robust interfacial stability. The films exhibited excellent electrochemical performance, including high ionic conductivity, large Li⁺ transference number, and a wide electrochemical stability window at room temperature. Rare earth elements contributed to the formation of a stable solid electrolyte interphase (SEI), effectively suppressing lithium dendrite growth in symmetric cells at current densities of 2 mA/cm² and 0.25 mA/cm² without shortcircuiting. Batteries assembled with these dual ceramic-based electrolytes demonstrated superior cyclic stability and high Coulombic efficiency. This work highlights that sustainable binarynetwork Li-ion conductors offer a promising route toward safe, high-performance, and environmentally friendly energy storage devices.
Keywords: LATP, LLTO, lithium-metal batteries, Earth Elements
Biography:
Dr. Sajid Hussain Siyal is an Associate Professor in
the Department of Metallurgy and Materials Engineering at Dawood University of
Engineering and Technology (DUET), Karachi, Pakistan. He served as Chair of the
department from 2020 to 2025. Dr. Siyal began his academic career at DUET as a
lecturer in 2009, shortly after earning his Bachelor’s degree in Metallurgy and
Materials Engineering from Mehran University of Engineering and Technology,
Jamshoro. He completed his Master’s in Materials Engineering at NED University
of Engineering and Technology, Karachi in 2014 and obtained his Ph.D. in
Materials Science and Engineering from the Advanced Composite Center, State Key
Laboratory of Organic-Inorganic Composites, Beijing University of Chemical
Technology in 2019.
Dr. Siyal’s research focuses on solid-state
electrolytes, energy storage devices, lithium-ion batteries, and advanced
composite materials. He has authored over 49 peer-reviewed research articles in
high-impact journals and has contributed extensively to the development of
materials for sustainable energy applications. His work bridges fundamental
materials science and applied energy technologies, fostering interdisciplinary
collaborations at both national and international levels.
Dr. Sajid Hussain Siyal is committed to advancing
research and education in materials engineering and mentoring the next
generation of scientists and engineers.