About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
Presentation Title |
Application of electrochemical impedance spectroscopy in Sn as a negative electrode and LNMO as a positive electrode for lithium ion battery: Understanding the state of charge and health of the battery |
Author(s) |
Arghyadeep Sau, Rohit Anand, Karabi Das, Siddhartha Das |
On-Site Speaker (Planned) |
Arghyadeep Sau |
Abstract Scope |
Tin (Sn) as an anode and lithium nickel manganese oxide (LNMO) as a cathode hold the advantages of relatively high capacity and high working potential respectively. In this work electrochemical impedance spectroscopy (EIS) has been used to extract few important circuit elements, which reveal many key features regarding various physical phenomena happening inside the electrochemical cell. In case of Sn electrode, 60 % state of charge (SoC) is crucial for bulk resistance due to formation of new lithiated phase. In LNMO electrode, 20 % and 100 % SoC are vital because of redox reaction of Mn3+/ Mn4+ and high voltage structural alteration respectively. Despite forming a stable solid electrolyte interface (SEI) in Sn electrode, exhaustion of Li+ ions with aging impacts the battery health negatively. However, LNMO electrode is less damaged in terms of cell impedance for most part of the aging maintaining a good state of health (SoH). |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, |