Friday, 01 July 11:00am – 12:00pm

This seminar will be delivered in Chemistry Lecture Theatre 4 and Online Zoom. Please email chemistry.researchsupport@sydney.edu.au for zoom link and password.

Speaker: Prof. Prabeer Barpanda; Materials Research Centre (MRC), Indian Institute of Science (IISc)

Host: Prof. Chris Ling

Title: Iron-based high-voltage polyanionic battery cathode materials

Abstract: Building advanced batteries for next generation gives impetus to design novel cathode materials with improved electrochemical properties. It is important to produce future cathodes with high redox potential to realize high energy density. In this pursuit, various phosphate and sulphate based polyanionic compounds have been developed. They are namely fluorophosphates, pyrophosphates, polysulphates etc. These compounds have complex crystal chemistry and can deliver voltage approaching 4 V just like LiCoO₂. All these materials can be eco-efficiently produced by either low temperature and/or quick annealing synthetic methods like ionothermal synthesis and solution combustion routes. The current talk will discuss several case studies on high-voltage Fe-based cathode materials. Based on inductive effect, several SO₄-based cathodes can be harnessed to offer near 4 V activity. Two such systems, namely triplite fluorosulfate and alluaudite polysulfate, will be elaborated for Li-ion and Na-ion batteries.