Vibrational and electrochemical studies of pectin—a candidate towards environmental friendly lithium-ion battery development

Abstract

Pectin polymers are considered for lithium ion battery electrodes. To understand the performance of pectin as an applied buffer layer, the electrical, magnetic and optical properties of pectin films are investigated. This work describes a methodology for creating pectin films, including both pristine pectin and Fe-doped pectin, which are optically translucent, and explores their potential for lithium-ion battery application. The transmission response is found extended in optimally Fe doped pectin, and prominent modes for cation bonding are identified. Fe doping enhances the conductivity observed in electrochemical impedance spectroscopy (EIS), and from the magnetic response of pectin evidence for Fe3+ is identified. The Li-ion half-cell prepared with pectin as binder for anode materials such as graphite shows stable charge capacity over long cycle life, and with slightly higher specific capacity compare with the cell prepared using PVDF as binder. A novel enhanced charging specific capacity at high C-rate is observed in cells with pectin binder suggesting within a certain rate (∼5C) pectin has higher capacity at faster charge rates. The pectin system is found as a viable base material for organic-inorganic synthesis studies.

Polysaccharide Composite Alginate–Pectin Hydrogels as a Basis for Developing Wound Healing Materials

“…Figure 6 shows the measured spectra of pectin and alginate (after subtraction of the substrate spectrum) with the indicated ratios, their sum, and the experimentally obtained RS spectrum in the mixture for ease of comparison. Note that the spectra obtained for both alginate and pectin practically coincide with the data in the literature [ 43 , 44 , 45 , 46 ].…”

“…After subtracting the luminescence, these spectra appear to be highly noisy. Hence, we utilized the Raman spectra of dried samples for subsequent analysis, following the approach in [ 43 , 44 , 45 ]. It is important to note that the final objective of the entire project is the development of sponges for therapeutic patches.…”

Natural Polymer Encapsulated Zeolitic Imidazolate Framework-12 Composite toward Electrochemical Sensing of Antitumor Agent

“…The peaks at 243, 779, 1011, 1263, and 1360 cm –1 were attributed to the C–C–C out of plane bending, C–H out of plane bending, C–C–C trigonal bending, C–H in plane bending, and C–N stretching vibrations of the benzimidazole organic framework, respectively. , The sharp peak at 307 cm –1 may be attributed to the Co–N vibration, which suggests the presence of cobalt in ZIF-12 . In Pec, the peaks around 330, 441, 853, and 1700 cm –1 correspond to the dominant bands, α-glycosidic bonds, and CO stretching vibration of the ester carbonyl group. , The composite Pec@ZIF-12 exhibits a high intense peak around 680 cm –1 , while the other peaks of ZIF-12 have less intensity, thereby strongly suggesting the interaction of both materials.…”

“…44 In Pec, the peaks around 330, 441, 853, and 1700 cm −1 correspond to the dominant bands, α-glycosidic bonds, and C� O stretching vibration of the ester carbonyl group. 45,46 The composite Pec@ZIF-12 exhibits a high intense peak around 680 cm −1 , while the other peaks of ZIF-12 have less intensity, thereby strongly suggesting the interaction of both materials. Functional groups determination were performed by FTIR spectrometry shown in Figure 1C.…”

Advanced TiO2/Al2O3 Bilayer ALD Coatings for Improved Lithium-Rich Layered Oxide Electrodes

“…These plots revealed three distinct signatures around the frequency regions of 103 Hz (P1), 10 Hz (P2), and 1 Hz (P3) respectively. P1 can be attributed to the surface film resistance resulting from Li-ion migration through the electrode surfaces, P2 to the electrode/electrolyte interfacial charge transfer resistances, and P3 to the active material/current collector interfacial charge transfer and solid diffusion. − Upon comparing the color-mapped plots of all samples, it is evident that the signatures P1 and P2 in the AS200 electrode are much brighter than in the TAA series electrode, indicating a higher resistance of surface film and interfacial charge transfer resistances in the AS200 electrode. The relatively minor variation in impedance observed in the TAA series electrode is due to the ability of the TiO 2 /Al 2 O 3 bilayer coating to mitigate changes in the electrode/electrolyte interface in cycling.…”