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In-situ FTIR and Raman spectroscopy of lithium-ion batteries and lithium-sulfur batteries

Grant number: 21/09387-1
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2023
Field of knowledge:Engineering - Electrical Engineering - Electrical Materials
Principal Investigator:Hudson Giovani Zanin
Grantee:Murilo Machado Amaral
Host Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Host Company:Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Química (FEQ)
Associated research grant:17/11958-1 - CINE - Advanced Energy Storage Division, AP.PCPE
Associated scholarship(s):23/11416-5 - Investigation of lithium-sulfur batteries containing polymer-derived ceramic-based cathodes by in-situ synchrotron-based X-ray techniques., BE.EP.DR   23/11417-1 - Investigation of metal-doped polymer-derived ceramics as sulfur hosts for cathodes of lithium-sulfur batteries, BE.EP.DR


The investigation of the electrode/electrolyte interphase in lithium-ion batteries (LIBs) is crucial to enhance these devices' performance, and understanding the electrode and electrolytes employed. In this interphase, there is the formation of a passivation layer, known as SEI layer (solid-electrolyte interphase), which acts as an electronic insulator and ionic conductor. The SEI layer is pretty associated with the electrolyte and cathodes performance. Regarding the cathodes employed in LIBs, the ones that present high capacity and are free of cobalt, includes: LiMnO2 (LMO), LiNiO2 (LNO) and LiFePO4 (LFP). The reason to avoid working with cathodes containing cobalt is that it generates social and environmental issues. Despite LIBs present high energy density, this project will also include the study of supercapacitors, which are energy storage devices that present high power density. Primarily, the analysis of supercapacitor systems will consist of the investigation of the carbon electrode degradation with distinct electrolytes. This project is going to comprise: (a) the synthesis and characterization of new electrodes and electrolytes, in both batteries and supercapacitor configurations; (b) the electrode/electrolyte characterization; (c) the behavior of electrodes and electrolyte in transient potentials; (d) the electrode and electrolyte degradation under abusive potentials; and (e) the formation of passivation films, as the SEI layer in LIBs. The in-situ analysis can be performed with the 2 or 3 electrode configuration. Possibly, this will be the first time in Brazil that the in-situ and operando FTIR spectroscopy will be employed for these types of cells. To support this study, other techniques will be used, as Raman, and the "evolved-gas analysis". Other spectroscopy techniques can be employed for ex-situ and post-mortem analysis, as Raman, XPS, and XRD. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
AMARAL, MURILO M.; BIN MUJIB, SHAKIR; SANTOS, ERICK A.; RIBEIRO, JOSIMAR; ZANIN, HUDSON; SINGH, GURPREET. A sulfur host based on silicon oxycarbide for advanced lithium-sulfur batteries. JOURNAL OF ENERGY STORAGE, v. 72, p. 11-pg., . (21/09387-1, 22/02222-0)

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