Florencia Marchini

Florencia Marchini
Umicore

PhD

About

25
Publications
4,884
Reads
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419
Citations
Citations since 2016
20 Research Items
411 Citations
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2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
R&D Project Manager at Umicore. Former postodoctoral researcher at Collège de France. PhD from University of Buenos Aires.
Additional affiliations
September 2018 - November 2018
Collège de France
Position
  • PostDoc Position
March 2014 - present
Universidad de Buenos Aires
Position
  • Graduate teaching assistant
March 2011 - present
Universidad de Buenos Aires
Position
  • Doctoral Fellow
Education
March 2006 - August 2012
Universidad de Buenos Aires
Field of study
  • Chemistry

Publications

Publications (25)
Article
Full-text available
The study of chemo-mechanical stress taking place in the electrodes of a battery during cycling is of paramount importance to extend the lifetime of the device. This aspect is particularly relevant for all-solid-state batteries where the stress can be transmitted across the device due to the stiff nature of the solid electrolyte. However, stress mo...
Article
Full-text available
Insertion compounds provide the fundamental basis of today’s commercialized Li-ion batteries. Throughout history, intense research has focused on the design of stellar electrodes mainly relying on layered oxides or sulfides, and leaving aside the corresponding halides because of solubility issues. This is no longer true. In this work, we show the f...
Article
Full-text available
Solid-state batteries are enjoying a regained interest owing to the discovery of sulfide-based solid electrolytes with ionic conductivities comparable to their liquid counterparts. Among them, the metastable β-Li3PS4 polymorph has attracted great attention given its high room temperature ionic conductivity (≈0.15 mS cm⁻¹) when synthesized via a sol...
Preprint
Insertion compounds provide the fundamental basis of today’s commercialized Li-ion batteries. Throughout history, intense research has focus on the design of stellar electrodes mainly relying on layered oxides or sulfides, and leaving aside the corresponding halides because of solubility issues. This is no longer true. In this work, we show for the...
Article
Great hopes are placed on all-solid state Li-metal batteries (ASSB’s) to boost the energy density of the current Li-ion technology. Though, these devices still present a number of unresolved issues that keep them far from commercialization such as interfacial instability, lithium dendrite formation and lack of mechanical integrity during cycling. T...
Article
Using potentiometric detection of lithium ions with a rotating ring disc electrode (RRDE), we report for the first time the simultaneous direct measurement of lithium ion fluxes for two experiments: a) O2 reduction in LiPF6 DMSO electrolyte and b) insertion and release of Liþ into and from LiMn2O4 spinel structure in contact with aqueous Liþ ion so...
Thesis
Full-text available
In our times, society has become greatly dependent upon energy, which is largely obtained from combustion of fossil fuels. Unfortunately, this is a major contributor to climate change, making the total transition to alternative renewable energies highly necessary in the near future. To make that possible, it is crucial to have technological capacit...
Article
Full-text available
Cubic spinel LiMn2O4 has been studied for the reversible extraction of Li⁺ from natural brine after the application of suitable electrode potentials. In this work we report on the insertion/extraction of Li⁺ from natural brine of Olaroz salt flat (Jujuy, Argentina) and aqueous LiCl solutions into/from Li1-xMn2O4 (0 < x ≤ 1) to determine changes in...
Article
The spontaneous electrochemical extraction of lithium chloride from natural brine of high altitude salt flats in Northwest Argentina and recovery in a dilute electrolyte is demonstrated in two experiments: i) a highly selective LiMn 2 O 4 insertion cathode and polypyrrole anion selective anode (salt capturing) and ii) an LiMn 2 O 4 anode and lithiu...
Article
The LiMn2O4-Polypyrrole electrochemical cell has been shown to extract LiCl from natural brine at low voltage with high selectivity, low energy consumption (5-10Wh·mol⁻¹) and good stability. The intercalation/de-intercalation of Li⁺ ions in LixMn2O4 (0≤x≤1) has been studied by electrochemical impedance spectroscopy (EIS) at different potentials and...
Article
DMSO has been widely investigated as a potential electrolyte for the Li-air battery systems, however its stability has been a topic of debate in the research community. In this communication we have identified the side reaction products during the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on Au in dimethyl sulfoxide-based...
Article
We report on the growth and characterization of non-epitaxial but (100)-highly textured BaBiO3 thin films on silicon substrates. We have found the deposition conditions that optimize the texture, and show that the textured growth is favoured by the formation of a BaO layer at the first growth stages. X-ray diffraction Φ-scans, together with the obs...
Article
Demetalation of zinc 5,10,15,20-tetraphenylporphyrin (ZnTPP) under acidic conditions and ion exchange with Cu(2+) ions at neutral pH are both rapid reactions in the liquid medium. However, for ZnTPP monolayers adsorbed on a Au(111) surface exposed to aqueous solution, we find that, although ion exchange takes place rapidly as expected, demetalation...
Article
Porphyrin demetalation and metal-center exchange were investigated at the solid–liquid interface by exposing adsorbed zinc tetraphenylporphyrin on Au(111) to aqueous solutions. Metal-center exchange with copper ions at neutral pH took place rapidly, but demetalation under acidic conditions was not observed. This difference to liquid-phase chemistry...
Article
Full-text available
We report on the surface and bulk chemistry of LixMn2O4 (0 < x < 1) spinel oxide electrode for the selective extraction of LiCl from natural salt lake brines using an electrochemical method based on LiMn2O4 (LMO) lithium intercalation electrode and polypyrrole (PPy) reversible chloride electrode. Both the surface composition and insertion/release o...
Article
Full-text available
A highly selective LiMn2 O4 -Polypyrrole electrochemical cell for the extraction of LiCl from natural brine is described. Reproducible intercalation of Li⁺ in Lix Mn2 O4 (0 ≤ x ≤ 1) and Cl- in oxidized polypyrrole (PPy+) is achieved with an overall cell voltage of less 1 V over more than 200 cycles with 50% charge efficiency and 5-10 Wh.mol⁻¹ energ...
Article
Controlling the metalation of surface porphyrins is a critical process in porphyrin based devices. Indeed, surface porphyrins are known to metalate in ultrahigh vacuum (UHV) from co-deposited metal atoms or substrate atoms. However, it is not yet known if surface porphyrins could metalate from ions in solution, i.e. the most likely environment for...
Article
We have investigated the adsorption and temperature-dependent reactions of phthalic acid on Ag(100), in the temperature range 110-700 K, by synchrotron radiation X-ray photoelectron spectrocopy (SR-XPS), temperature-programmed desorption (TPD) and near-edge X-ray absorption fine structure (NEXAFS). Phthalic acid adsorbs intact at 110 K, but decompo...
Article
Full-text available
The presence of 2D electron gases at surfaces or interfaces in oxide thin films remains a hot topic in condensed matter physics. In particular, BaBiO3 appears as a very interesting system as it was theoretically proposed that its (001) surface should become metallic if a Bi-termination is achieved (Vildosola et al., PRL 110, 206805 (2013)). Here we...
Article
The O2/Li2O2 electrode reaction has been studied on low surface area Au electrodes in three solvent-electrolyte pairs (0.1M LiPF6/DMSO, LiPF6/ACN and LiBF4/ACN) using an electro-chemical cell coupled to UHV XPS spectrometer, EQCM, AFM and DEMS. The XPS spectra of the surfaces after treatment at selected electrode potentials for the O2 reduction and...

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Projects (2)
Archived project
https://www.sciencecanchangetheworld.org/en_US/solutions/renewable-energy/lithium-extraction-process-for-renewable-energy-storage.html