Hervé Martinez

Université de Pau et des Pays de l'Adour

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

D. Gonbeau

Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux

Brigitte Pecquenard

Institut de Chimie de la Matière Condensée de Bordeaux

Laure Monconduit

Centre National de la Recherche Scientifique

Jean‐Charles Dupin

Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux

Rémi Dedryvère

Université de Pau et des Pays de l'Adour

Frédéric Le Cras

Institut de Chimie de la Matière Condensée de Bordeaux

Jean‐Bernard Ledeuil

Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux

Lénaïc Madec

Centre National de la Recherche Scientifique

Delphine Flahaut

Réseau sur le Stockage Electrochimique de l'énergie

Cécile Tessier

Saft (France)

Cooperative Institutions

Centre National de la Recherche Scientifique

358

Université de Pau et des Pays de l'Adour

105

Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux

Université de Toulouse

Université Toulouse III - Paul Sabatier

Réseau sur le Stockage Electrochimique de l'énergie

Institut de Chimie de la Matière Condensée de Bordeaux

Université de Montpellier

Institut de Chimie

Université de Bordeaux

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Experimental Measurements of Carbon Dioxide Solubility in Na–Ca–K–Cl Solutions at High Temperatures and Pressures up to 20 MPa

Journal of Chemical & Engineering Data (2019)

Marie Poulain Hamdi Messabeb Adeline Lach François Contamine Pierre Cézac

Experimental CO2 solubility data in brine at high pressures and high temperatures are needed in different technologies such as carbon dioxide storage or geothermal process. A lot of data have been acquired in single-salt solutions, whereas data for mixed-salt solutions remain scarce. In this study, new carbon dioxide solubility data in salt solutions have been measured. Two synthetic brines have been studied at 323, 373, and 423 K from 1 to 20 MPa. The brine 1 is composed of a mixture of NaCl and CaCl2 and the brine 2 is made from a mixture of NaCl, CaCl2, and KCl. Measurements have been carried out by conductimetric titration. In this study, 6 isotherms presenting 48 new solubility data have been reported. These results have been obtained in an original range of temperature, pressure, and salinity. In these conditions of temperature and pressure, we verified that an increase of the temperature or the salinity involves a decrease of the CO2 solubility. On the other hand, an increase of the pressure implies an increase of the CO2 solubility. Then, the obtained results were compared with the values calculated using PhreeSCALE and PSUCO2 models. The comparison between experimental and calculated values revealed a good agreement.

Brine

Atmospheric temperature range

10.1021/acs.jced.9b00023

Cite

Citations (17)

Caractérisation physico-chimique des interfaces électrode/électrolyte dans les batteries Li-ion composées d'une anode de TiNb2O7.

Karama Ghamgui Cécile Courrèges Antonin Gajan Cécile Tessier Hervé Martinez

Source

Cite

Citations (0)

Interest of Cross-Section Surface Analysis for Li-Ion Batteries and Beyond

Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) (2019)

Lénaïc Madec Jean‐Bernard Ledeuil Grégory Gachot Gaël Coquil Cécile Courrèges

Conversion type reaction have revolutionized Li-ion batteries and beyond in term of performance as well as of fundamental aspects. To tackle the volume expansion issue occurring during lithiation/delithiation, composite materials made of electrochemically active/inactive elements have been successfully developed. 1 , 2 However, direct evidence of the electrochemical conversion reaction as well as the role of the inactive elements over long term cycling still remains to be elucidated. To tackle this issue, we propose advanced surface Auger / µXPS / ToF-SIMS imaging to analyze the chemical and morphological evolution of clean electrodes cross-sections, prepared by ion-milling. These innovative approaches were used to study ternary conversion materials, MSnSb (M=Ti or Nb) for which unexpected electrochemical performance were observed at high temperature. 3 , 4 It provided a direct proof that the electrochemical conversion mechanism still occurred even after 400 cycles, which was unexpected. Importantly, it highlights the role of the inactive element (Ti or Nb) in the long term reversibility of the conversion reaction. Overall, a gradual shell to core expansion/break up of MSnSb particles is revealed during the continuous conversion reactions which leads to highly porous structures after 400 cycles. Finally, it will be showed that the developed approaches will benefit to the study of all-solid-state batteries for which buried interfaces have to be reached. References V. Aravindan, Y. S. Lee, and S. Madhavi, Adv. Energy Mater. , 5 , 1402225 (2015). A. Mukhopadhyay and B. W. Sheldon, Prog. Mater. Sci. , 63 , 58 (2014). L. Madec, G. Gachot, G. Coquil, H. Martinez, and L. Monconduit, J. Power Sources , 391 , 51 (2018). G. Coquil, M. T. Sougrati, S. Biscaglia, D. Aymé-Perrot, P. F. Girard, and L. Monconduit, Electrochim. Acta , 281 , 619 (2018).

Energy transformation

10.1149/ma2019-02/5/410

Cite

Citations (0)

Improvement of the stability of TiSnSb anode under lithiation using SEI forming additives and room temperature ionic liquid/DMC mixed electrolyte

Electrochimica Acta (2015)

Wanjie Zhang Fouad Ghamouss Adrien Méry Daniel Lemordant Rémi Dedryvère

10.1016/j.electacta.2015.04.009

Cite

Citations (10)

Enhanced electrochemical performance of Lithium-ion batteries by conformal coating of polymer electrolyte

Nanoscale Research Letters (2014)

Nareerat Plylahan Sébastien Maria Trang N. T. Phan Manon Létiche Hervé Martinez

This work reports the conformal coating of poly(poly(ethylene glycol) methyl ether methacrylate) (P(MePEGMA)) polymer electrolyte on highly organized titania nanotubes (TiO2nts) fabricated by electrochemical anodization of Ti foil. The conformal coating was achieved by electropolymerization using cyclic voltammetry technique. The characterization of the polymer electrolyte by proton nuclear magnetic resonance ((1)H NMR) and size-exclusion chromatography (SEC) shows the formation of short polymer chains, mainly trimers. X-ray photoelectron spectroscopy (XPS) results confirm the presence of the polymer and LiTFSI salt. The galvanostatic tests at 1C show that the performance of the half cell against metallic Li foil is improved by 33% when TiO2nts are conformally coated with the polymer electrolyte.

Conformal coating

10.1186/1556-276x-9-544

Cite

Citations (16)

Probing the in-depth distribution of organic/inorganic molecular species within the SEI of LTO/NMC and LTO/LMO batteries: A complementary ToF-SIMS and XPS study

Applied Surface Science (2019)

Nicolas Gauthier Cécile Courrèges Julien Demeaux Cécile Tessier Hervé Martinez

Degradation

10.1016/j.apsusc.2019.144266

Cite

Citations (56)

First principles calculations of solid–solid interfaces: an application to conversion materials for lithium-ion batteries

Journal of Materials Chemistry (2012)

L. Martin Germain Salvato Vallverdu Hervé Martinez Frédéric Le Cras Isabelle Baraille

Using periodic density functional theory approaches, the thermodynamic stability of solid–solid interfaces generated during the conversion reaction of copper oxide which is a promising electrode material is investigated. Previous experimental results showed that conversion reactions generate a huge proportion of solid–solid interfaces among Cu2O–Cu, Li2O–Cu and Cu2O–Li2O. Interface grand potentials as a function of the voltage against Li|Li+ were computed in order to determine the chemical composition of the most stable interfaces. Then a structural model of the electrode material is proposed, based on the works of adhesion of the most stable systems identified in the first step.

Chemical Stability

10.1039/c2jm35078e

Cite

Citations (32)

Atomic Layer Fluorination of the Li₄Ti₅O₁₂ Surface: A Multiprobing Survey

ACS Applied Energy Materials (2019)

Youn Charles‐Blin Delphine Flahaut Jean‐Bernard Ledeuil Katia Guérin Marc Dubois

Li4Ti5O12 (LTO) particles are successfully modified by an atomic layer fluorination process using a one-shot solvent-free synthesis performed with a solid-state fluorinating agent, xenon difluoride, at room temperature. LTO is reported as a promising anode material for lithium-ion batteries (LIBs) where high charging rates and long cycle life are required, because of its high potential preventing lithium dendrite deposition. The fluorination leads to the formation of passivating "Li—F" environments at the particle surface using the lowest amount of fluorine reported in the literature. Thanks to a multiprobing strategy, the impact of the fluorination on nonmodified, noncoated LTO has been characterized from the bulk to the extreme surface. The XRD patterns as well as the Raman spectra show no structural modification of the bulk while the combination of the XPS and NMR analysis gives insights about the impact of the fluorination on the entirety of the material. Auger fluorine chemical mapping displays the spatial distribution of a fluorinated layer all around the LTO particles.

Xenon difluoride

Fluorine

Difluoride

Surface layer

Surface Modification

10.1021/acsaem.9b01191

Cite

Citations (15)

Comprehensive X-ray Photoelectron Spectroscopy Study of the Conversion Reaction Mechanism of CuO in Lithiated Thin Film Electrodes

The Journal of Physical Chemistry C (2013)

Lucile Martin Hervé Martinez Delphine Poinot Brigitte Pecquenard Frédéric Le Cras

The course of the conversion reaction during the electrochemical insertion/deinsertion of lithium in CuO thin film electrodes was surveyed by cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS). The electrochemical processes were studied through the comprehensive acquisition and interpretation of XPS and Auger spectra (Cu 2p, O 1s, Cu LMM) recorded at different stages of the first cycle of a Li/CuO cell. The reduction process consisting of three main steps leads successively to Cu+ and Cu0 and involves a Li2O2 peroxide type phase as an intermediate, whereas Li2O is the main lithiated oxide at the end of the discharge. Only the two last steps appear reversible in charge. No evidence of Cu2+ was found at the end of the charge at 3.5 V/Li+/Li, showing the irreversibility of the first step in our experimental conditions. Complementary XPS depth profile analyses were performed to check the evolution of the active material composition over the thickness of the electrode.

Auger electron spectroscopy

10.1021/jp3119633

Cite

Citations (262)

New insights into the characterization of the electrode/electrolyte interfaces within LiMn₂O₄/Li₄Ti₅O₁₂ cells, by X-ray photoelectron spectroscopy, scanning Auger microscopy and time-of-flight secondary ion mass spectrometry

Journal of Materials Chemistry A (2017)

Jean-Baptiste Gieu Volker Winkler Cécile Courrèges Loubna El Ouatani Cécile Tessier

This work aims to study the electrode/electrolyte interfaces in a Li₄Ti₅O₁₂ (LTO)/LiMn₂O₄ (LMO) cell assembled with a VC-containing electrolyte and operating at 60 °C.

Characterization

10.1039/c7ta02529g

Cite

Citations (37)