Title: Thermal Decomposition Analysis of Electrode Materials for Enhanced Energy Storage System

Authors: Andekuba Andezai, Xuemei Cui, Ugonna E, Onyango Collier and Jude Iroh

DOI: 10.33599/nasampe/s.24.0117

Abstract: The thermal properties of important electrode materials used in the construction of batteries and supercapacitors are investigated by using differential scanning calorimetry (DSC). Our initial study, carried out under ambient air condition, in a temperature range of 25°C to 100°C, at a heating rate of 10°C/min, did not reveal any notable thermal transition peaks, indicating minimal thermal events within this temperature range. Subsequent experiments revealed that the slurry containing alumina and poly(vinylidene fluoride) showed a peak due to the melting of PVDF at about 150˚C. Additional evidence for the thermal decomposition of the samples was shown at a higher temperature ≥ 350˚C. Follow-up DSC runs performed in nitrogen atmosphere provided a deeper understanding of the thermal behavior of polyimide/CNT-PDVF samples annealed at various temperatures (80°C, 90°C, 120°C, 150°C, 180°C, and 250°C). A critical phase transition was shown by a sharp exothermic peak at about 150 °C. Interestingly, the samples annealed at 80°C and 90°C, respectively, showed evidence of amidization process in the form of a broad and intense peak at around 60°C. The results of a subsequent runs in nitrogen atmosphere, showed thermal decomposition peaks at 450, 570, 600, and 650 °C. This study provides valuable insight into the thermal behavior of hybrid nanocomposite based energy storage electrode materials. The sustainable energy industries will benefit immensely from the results of this study, especially for device optimization and safety.

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Conference: SAMPE 2024

Publication Date: 2024/05/20

SKU: TP24-0000000117

Pages: 8

Price: $16.00