Identification of thin films on zinc substrates by FTIR and Raman spectroscopies

Kasperek, J.; Lenglet, M.

doi:10.1051/metal/199794050713

Cited by 20 publications

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“…Subsequent investigation with the high-resolution transmission electron microscope (HRTEM) revealed the high crystallinity of the Zn substrate with an interplanar distance of 0.485 nm, matching the Zn (001) planes (Figure b). , The HRTEM also showed the presence of a distinct lattice structure on the Zn metal surface (Figure b), and the interplanar spacing was measured to be around 0.283 nm, corresponding to the (104) planes of ZnCO 3 . On the Fourier transform infrared spectra (FTIR) spectra, the characteristic peaks of the corroded Zn foil cycled in the blank electrolyte observed at 1080 cm –1 and 970 cm –1 were assigned to the asymmetric and symmetric stretching vibrations (SO 4 2– and O–S–O; Figure c) . The Zn anode cycled in the Ar-purged electrolyte show similar peaks with the anode in the blank electrolyte, both evidencing the existence of side products.…”

Section: Resultsmentioning

confidence: 97%

Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer

et al. 2022

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Aqueous Zn-ion batteries (AZIBs), being safe, inexpensive, and pollution-free, are a promising candidate for future large-scale sustainable energy storage. However, in a conventional AZIBs setup, the Zn metal anode suffers oxidative corrosion, side reactions with electrolytes, disordered dendrite growth during operation, and consequently low efficiency and short lifespan. In this work, we discover that purging CO2 gas into the electrolyte could address these issues by eliminating dissolved O2, inhibiting side reactions by buffering the local pH change, and preventing dendrite growth by inducing the in situ formation of a ZnCO3 solid electrolyte interphase layer. Moreover, the CO2-purged electrolyte could enable a highly reversible plating/stripping behavior with a high Coulombic efficiency of 99.97% and an ultralong lifespan of 32,000 cycles (1600 h) even under an ultrahigh current density of 40 mA cm–2. Consequently, the CO2-purged symmetrical cells deliver long cycling stability at a high depth of discharge of 57%, while the CO2-purged Zn/V2O5 full cells exhibit outstanding capacity retention of 66% after 1000 cycles at a high current density of 5 A g–1. Our strategy, the simple introduction of CO2 gas into the electrolyte, could effectively mediate the zinc anode’s critical issues and provide a scalable and cost-effective pathway for the commercialization of AZIBs.

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Section: Resultsmentioning

confidence: 97%

Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer

et al. 2022

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“…During the Zn plating/stripping process, the H + from the decomposition of water will receive electrons and then evolve H 2 , which could induce an increase of OH -. The generated OHwill react with Zn 2+ , SO 4 43 . In contrast, the peaks of the Zn deposits underneath FCOF are not obvious and their intensity is much lower (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Horizontally Arranged Zinc Platelet Electrodeposits Modulated by Fluorinated Covalent Organic Framework Film for High-Rate and Durable Aqueous Zinc Ion Batteries

Guo

Zhao

Wang

et al. 2021

Preprint

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Rechargeable aqueous zinc-ion batteries (RZIBs) provide a promising complementarity to the existing lithium-ion batteries due to their low cost, non-toxicity and intrinsic safety. However, Zn anodes suffer from zinc dendrite growth and continuous unfavorable side reactions, resulting in low Coulombic efficiency (CE) and severe capacity decay. Here, we develop an ultrathin, fluorinated two-dimensional porous covalent organic framework (FCOF) film as a protective layer on the Zn surface to address these issues. The strong interaction between fluorine (F) in FCOF and Zn reduces the surface energy of the Zn (002) crystal plane and regulates planar growth of zinc anode materials. As a result, Zn deposits underneath FCOF films show parallel platelet morphology with (002) planar orientations preferred. Furthermore, F-containing nanochannels facilitate the de-solvation of hydrated Zn ions and prevent electrolyte penetration, thus retarding corrosion of Zn. Such unique FCOF films prolonged the Zn symmetric cell lifespan to over 1700 h, which is 13 times longer than the cells without protection (125 h). The assembled full cells demonstrate a cycle life of over 250 cycles at 3 mAcm-2 under practical conditions, including lean electrolyte (12 μLmAh-1), limited Zn excess (only 1×excess), and a high mass loading of MnO2 cathode (16 mgcm-2). This work provides a new perspective for the realization of planar deposition of zinc metal anodes for developing high performance Zn-based batteries.

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“…4 The reference FT-IR spectra of these compounds were achieved in a previous study. 8 6 •nH 2 O (principally n 5 5, and traces of n 5 1). In the rural area, a mixture of carbonate and hydrated sul te has been identi ed as early as the rst month.…”

Section: Methodsmentioning

confidence: 99%

FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

et al. 2001

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The possible use of an FT-IR imaging system for surface studies of atmospheric corrosion products on zinc and nickel samples has been explored. Samples have been exposed in an urban site located at Rouen in France. Corrosion products, detected by means of energy-dispersive spectrometry/X-ray diffraction (EDS/XRD) and FT-IR spectroscopy, are mainly Zn4CO3(OH)6·H2O, ZnSO3·nH2O, Zn4SO4(OH)6·nH2O, and NiSO4·xH2O. IR microspectroscopy and mapping techniques allow the observation of the heterogeneous distribution of chemical species on sample surfaces. While the zinc corroded surface seems uniform, inhomogeneity in the development of carbonate and hydroxysulfate compounds in layers is observed. The imaging chemical analysis enables the assignment of the 1550 cm−1 absorption band of the corrosion product to zinc hydroxycarbonate. The corrosion mechanism observed on nickel is pitting corrosion. Pit size, chemical mapping, and 3-D visualization determined from SEM/EDS and FT-IR maps are very similar.

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Identification of thin films on zinc substrates by FTIR and Raman spectroscopies

Cited by 20 publications

References 0 publications

Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer

Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer

Horizontally Arranged Zinc Platelet Electrodeposits Modulated by Fluorinated Covalent Organic Framework Film for High-Rate and Durable Aqueous Zinc Ion Batteries

FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

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Identification of thin films on zinc substrates by FTIR and Raman spectroscopies

Cited by 20 publications

References 0 publications

Ultrastable Zinc Anode Enabled by CO2-Induced Interface Layer

Ultrastable Zinc Anode Enabled by CO2-Induced Interface Layer

Horizontally Arranged Zinc Platelet Electrodeposits Modulated by Fluorinated Covalent Organic Framework Film for High-Rate and Durable Aqueous Zinc Ion Batteries

FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

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Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer

Ultrastable Zinc Anode Enabled by CO₂-Induced Interface Layer