Seminar: Materials and Devices for Electrochemical Energy Storage

Two types of portable electrochemical energy storage devices have been used widely, one of which is rechargeable batteries such as Li-ion / Na-ion rechargeable batteries, and anther supercapacitor. In principle the fundamentals for these two types of energy storage devices are different. One relies on intercalation and deintercalation of Li-ions while supercapacitors are based on electric double-layer ions absorption and desorption. Owing to two different energy storage mechanisms, a battery is able to provide high energy density whereas a supercapacitor can receive and deliver substantially high power density. Based on the two different mechanisms, an energy storage device can be designed based on the requirement of energy and power density input and output. Due to safety issues, solid state battery has been received a lot of attention since it has high voltage, and possesses superior safety and long lives. Hence all-solid-state batteries are regarded as the next-generation power sources. As one of the crucial components in all-solid-state battery, solid-state electrolyte materials with high lithium ion conductivity and good chemical stability against lithium metal and cathode materials have been received great attention in order to fulfil application demand. To explore possible solutions, we have investigated the synthesis process. Different synthesis methods are used to decrease the porosity of the material as well as increase the uniformity of composition. Detailed parameters are studied to understand their influence on phase transformation progress and to obtain the optimal processing procedure. Systematic characterizations on crystal structure and morphology are conducted for further analysis.

This presentation will provide fundamentals of both devices, and materials and processing technology involved in the fabrication of materials for Li-ion batteries and supercapacitors as well as futuristic energy storage system. 

Biography

Li Lu received his Bachelor of Engineering and Master of Engineering from Tsinghua University, China in 1977 and 1982, respectively. After his master degree, Dr. Lu worked as Lecturer in Zhejiang University, China until 1985. From 1985 Li Lu continued his study at the Katholiek Universiteit Leuven, Belgium, and received degree in Doctor of Philosophy in 1989. He joined the Department of Mechanical Engineering, National University of Singapore in 1991 after two years researches as a post-doctor in Katholiek Universiteit Leuven and became a Full Professor in 2004. Dr. Lu’s research interests cover materials for Li-ion rechargeable batteries which include traditional bulk batteries and all-solid-state batteries, and for supercapacitors, and piezoelectric and ferroelectric materials.

Dr. Lu has published over 400 papers in international journals and 3 monographs, and received over 10,000 citations. To recognize his contribution nanostructured materials, he was honored as Affiliate Professor at University of Idaho, USA, since April 2001. In 2010, Dr. Lu was honored as Guest Professor at Zhejiang University, and as Honorary Professor respectively by Queensland University, Australia from 2013 to 2015. He was awarded as Honorary Professor by Shenzhen Graduate School, Peking University from 2013 to 2015, and Guest Professor by Hunan University from 2013.Very recently he was honored again as Honorary Professor at Chongqing University, and Guest Professor at Hubei University of Education (2016-2019).

He is Editor-in-Chief of Functional Materials Letters (World Scientific Publisher), Associate Editor of Materials Technology (Taylor & Francis) particularly in charge of functional materials, and member of Editorial Board of Scientific Report (Nature Publishers). He is founding Chairman of Functional Materials Society.

Date & time

1.30–3pm 23 February 2017

Location

Room:Seminar Room (R214)

External speakers

Professor Li Lu, Department of Mechanical Engineering, National University of Singapore

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