Location
Innovation Lab Atrium
Start Date
4-3-2025 10:00 AM
End Date
4-3-2025 11:30 AM
Presentation Date
3 April 2025, 10:00am - 11:30am
Biography
Sutapa is a PhD candidate at the Chemistry Department at Missouri University of Science and Technology working in the field of Solid-State Inorganic Chemistry in Dr. Amitava Choudhury’s research group. The focus of Sutapa’s research is to explore new polyanion cathode materials for rechargeable batteries. Sutapa has obtained her bachelors and master’s in chemistry from India and moved to the United States for a Masters in Materials Science and Engineering from the Catholic University of America, Washington DC.
Meeting Name
2025 - Miners Solving for Tomorrow Research Conference
Department(s)
Chemistry
Second Department
Physics
Document Type
Poster
Document Version
Final Version
File Type
event
Language(s)
English
Rights
© 2025 The Authors, All rights reserved
Included in
Condensed Matter Physics Commons, Materials Chemistry Commons, Physical Chemistry Commons
An open-framework iron-selenite as cathode for Li- ion batteries
Innovation Lab Atrium
Comments
Advisor: Amitava Choudhury
Abstract:
The need for low-cost, safe cathode materials for lithium-ion batteries requires exploration of new iron based polyanion cathode materials. In this work we have explored the electrochemistry of an iron containing selenite-based polyanion compound, LiFe(SeO3)2. The crystal structure is built up of a three-dimensional open framework network with empty channels through all three axes. The compound can insert Li in the structure through both chemical and electrochemical reduction. When tested as a Li-ion battery cathode the compound achieves reversible intercalation of 0.9 moles of Li by accessing the Fe2+/Fe3+ redox. The electrochemical intercalation of Li occurs via multiple phase transitions resulting in a staircase like voltage composition profile, which is also explained by theoretical structural optimization. When subjected to electrochemical oxidation first, it shows 0.2 moles of Li extraction from LiFe(SeO3)2 suggesting a partial Fe3+ to Fe4+ redox in a comparatively lower potential (< 4.2 Volt) than commonly seen.