Sébastien Gottis | Université de Picardie Jules Verne (original) (raw)
Papers by Sébastien Gottis
Carbohydrate Research, Mar 1, 2015
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
ACS Applied Materials & Interfaces, Mar 4, 2014
Li-ion batteries (LIBs) appear nowadays as flagship technology able to power an increasing range ... more Li-ion batteries (LIBs) appear nowadays as flagship technology able to power an increasing range of applications starting from small portable electronic devices to advanced electric vehicles. Over the past two decades, the discoveries of new metal-based host structures, together with substantial technical developments, have considerably improved their electrochemical performance, particularly in terms of energy density. To further promote electrochemical storage systems while limiting the demand on metal-based raw materials, a possible parallel research to inorganic-based batteries consists in developing efficient and low-polluting organic electrode materials. For a long time, this class of redox-active materials has been disregarded mainly due to stability issues but, in recent years, progress has been made demonstrating that organics undeniably exhibit considerable assets. On the basis of our ongoing research aiming at elaborating lithiated organic cathode materials, we report herein on a chemical approach that takes advantage of the positive potential shift when switching from para to ortho-position in the dihydroxyterephthaloyl system. In practice, dilithium (2,3-dilithium-oxy)-terephthalate compound (Li4C8H2O6) was first produced through an eco-friendly synthesis scheme based on CO2 sequestration, then characterized, and finally tested electrochemically as lithiated cathode material vs. Li. This new organic salt shows promising electrochemical performance, notably fast kinetics, good cycling stability and above all an average operating potential of 2.85 V vs. Li(+)/Li(0) (i.e., +300 mV in comparison with its para-regioisomer), verifying the relevance of the followed strategy.
Chemistry of Materials, Aug 1, 2019
Advanced Functional Materials, Dec 19, 2018
Scheme 1. Chemical structure of the ammonium cations reported in 2D/3D perovskite solar cells.
HAL (Le Centre pour la Communication Scientifique Directe), 2013
International audienc
Chemistry of Materials, Jan 10, 2017
A 2D-layered conjugated organic lithium carboxylate based on 4,4'-biphenyl core has been synthesi... more A 2D-layered conjugated organic lithium carboxylate based on 4,4'-biphenyl core has been synthesized and characterized by combining powder x-ray diffraction, two-dimensional solidstate 13 C NMR and high-resolution transmission electron microscopy. The combination of these complementary technics are identifying both molecular packing and structural organization within the solid. The electrochemical performances of this new organic negative electrode have been evaluated. The specific 2D-layered offered by the 4,4'-biphenyl Page 1 of 26 ACS Paragon Plus Environment Chemistry of Materials framework confers to the material an unprecedented rate capability, maintaining as high as 180 mAh.g-1 over 25 cycles at 2e-/ hour rate without any means of electrode formulation. Such electrochemical performances are ascribed at once to the enhancement of lithium conduction inside the mesoscopic crystal structure, promoted by the greater distance between the inorganic LiO 4 layers and to the greater structural robustness upon cycling sustaining no structural amorphization during lithium insertion by contrast to the other members of the series of carboxylate-based organic electrodes.
Advanced Functional Materials, Mar 1, 2020
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Energy and Environmental Science, 2013
ECS Meeting Abstracts, 2015
Detailed insight into the mechanism of interaction between organic substances, such as the electr... more Detailed insight into the mechanism of interaction between organic substances, such as the electrolyte solvents, and electrodes in electrochemical systems is a fundamental requirement for development of improved electrical energy storage (EES) devices. For instance Ni and Mn based high voltage cathode are the most promising candidates for positive electrode. However their surface chemical reactivity is enhanced by their high operating potential, above the upper limit of the thermodynamic stability window of standard organic carbonate-based electrolytes.[1] This results in electrolyte oxidation accompanied by transition metal dissolution, responsible for the gradual degradation of electrochemical performance in Li-ion batteries.[2] Manganese and nickel with a 2+ oxidation state has been observed in the solid electrolyte interphase (SEI) layer on the negative electrode.[3,4] As the impedance rise is directly proportional to the concentration of the unknown MnII species in the SEI[4] o...
ACS National Meeting Book of Abstracts
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
ACS Omega, 2019
We report a series of ferrocene-based derivatives and their corresponding oxidized forms in which... more We report a series of ferrocene-based derivatives and their corresponding oxidized forms in which the introduction of simple electron donating groups like methyl or tert-butyl units on cyclopentadienyl-rings afford great tunability of Fe +III /Fe +II redox potentials from +0.403 V down to −0.096 V versus saturated calomel electrode. The spin forbidden d−d transitions of ferrocene derivatives shift slightly toward the blue region with an increasing number of electron-donating groups on the cyclopentadienyl-rings with very little change in absorptivity values, whereas the ligand-to-metal transitions of the corresponding ferricinium salts move significantly to the near-IR region. The electron-donating groups also contribute in the strengthening of electron density of Fe +III d-orbitals, which therefore improves the chemical stability against the oxygen reaction. Further, density functional theory calculations show a reducing trend in outer shell reorganization energy with an increasing number of the electron donating units.
Chemistry of Materials, 2019
Advanced Functional Materials, 2018
Scheme 1. Chemical structure of the ammonium cations reported in 2D/3D perovskite solar cells.
Green Chemistry, 2017
N-Acetylglucosamine and N,N′-diacetylchitobiose are efficiently and selectively produced from chi... more N-Acetylglucosamine and N,N′-diacetylchitobiose are efficiently and selectively produced from chitin biomass by using RTILs and chitinases.
Journal of Molecular Structure, 2015
Fourier transform IR spectra of the first generation dendrons built from thiophosphoryl core with... more Fourier transform IR spectra of the first generation dendrons built from thiophosphoryl core with terminal P-Cl groups, vinyl (G 1) and azide (G 2) functional group at the level of the core have been recorded. The optimized geometries of low energy isomers of G 1 and G 2 have been calculated by density functional (DFT) method at the PBE/TZ2P level of theory. DFT is used for analyzing the properties of each structural part (core, branches, surface). It was found that the repeated branching units of G 1 and G 2 contain planar-O-C 6 H 4-CH=N-N(CH 3)-P< fragments. DFT results for the structure of G 1 and G 2 are in good agreement with X-ray diffraction measurements. A complete vibrational assignment is proposed for different parts of G 1 and G 2. The global and local reactivity descriptors have been used to characterize the reactivity pattern of the core functional and terminal groups. Natural bond orbital (NBO) analysis has been applied to comparative study of charge delocalization. Our study reveals why azide group linked to phosphorus has a different reactivity when compared to organic azides.
Carbohydrate Research, Mar 1, 2015
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
ACS Applied Materials & Interfaces, Mar 4, 2014
Li-ion batteries (LIBs) appear nowadays as flagship technology able to power an increasing range ... more Li-ion batteries (LIBs) appear nowadays as flagship technology able to power an increasing range of applications starting from small portable electronic devices to advanced electric vehicles. Over the past two decades, the discoveries of new metal-based host structures, together with substantial technical developments, have considerably improved their electrochemical performance, particularly in terms of energy density. To further promote electrochemical storage systems while limiting the demand on metal-based raw materials, a possible parallel research to inorganic-based batteries consists in developing efficient and low-polluting organic electrode materials. For a long time, this class of redox-active materials has been disregarded mainly due to stability issues but, in recent years, progress has been made demonstrating that organics undeniably exhibit considerable assets. On the basis of our ongoing research aiming at elaborating lithiated organic cathode materials, we report herein on a chemical approach that takes advantage of the positive potential shift when switching from para to ortho-position in the dihydroxyterephthaloyl system. In practice, dilithium (2,3-dilithium-oxy)-terephthalate compound (Li4C8H2O6) was first produced through an eco-friendly synthesis scheme based on CO2 sequestration, then characterized, and finally tested electrochemically as lithiated cathode material vs. Li. This new organic salt shows promising electrochemical performance, notably fast kinetics, good cycling stability and above all an average operating potential of 2.85 V vs. Li(+)/Li(0) (i.e., +300 mV in comparison with its para-regioisomer), verifying the relevance of the followed strategy.
Chemistry of Materials, Aug 1, 2019
Advanced Functional Materials, Dec 19, 2018
Scheme 1. Chemical structure of the ammonium cations reported in 2D/3D perovskite solar cells.
HAL (Le Centre pour la Communication Scientifique Directe), 2013
International audienc
Chemistry of Materials, Jan 10, 2017
A 2D-layered conjugated organic lithium carboxylate based on 4,4'-biphenyl core has been synthesi... more A 2D-layered conjugated organic lithium carboxylate based on 4,4'-biphenyl core has been synthesized and characterized by combining powder x-ray diffraction, two-dimensional solidstate 13 C NMR and high-resolution transmission electron microscopy. The combination of these complementary technics are identifying both molecular packing and structural organization within the solid. The electrochemical performances of this new organic negative electrode have been evaluated. The specific 2D-layered offered by the 4,4'-biphenyl Page 1 of 26 ACS Paragon Plus Environment Chemistry of Materials framework confers to the material an unprecedented rate capability, maintaining as high as 180 mAh.g-1 over 25 cycles at 2e-/ hour rate without any means of electrode formulation. Such electrochemical performances are ascribed at once to the enhancement of lithium conduction inside the mesoscopic crystal structure, promoted by the greater distance between the inorganic LiO 4 layers and to the greater structural robustness upon cycling sustaining no structural amorphization during lithium insertion by contrast to the other members of the series of carboxylate-based organic electrodes.
Advanced Functional Materials, Mar 1, 2020
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Energy and Environmental Science, 2013
ECS Meeting Abstracts, 2015
Detailed insight into the mechanism of interaction between organic substances, such as the electr... more Detailed insight into the mechanism of interaction between organic substances, such as the electrolyte solvents, and electrodes in electrochemical systems is a fundamental requirement for development of improved electrical energy storage (EES) devices. For instance Ni and Mn based high voltage cathode are the most promising candidates for positive electrode. However their surface chemical reactivity is enhanced by their high operating potential, above the upper limit of the thermodynamic stability window of standard organic carbonate-based electrolytes.[1] This results in electrolyte oxidation accompanied by transition metal dissolution, responsible for the gradual degradation of electrochemical performance in Li-ion batteries.[2] Manganese and nickel with a 2+ oxidation state has been observed in the solid electrolyte interphase (SEI) layer on the negative electrode.[3,4] As the impedance rise is directly proportional to the concentration of the unknown MnII species in the SEI[4] o...
ACS National Meeting Book of Abstracts
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents ... more A mes parents et soeurs, à toi "Mini Schatzi", à ma famille, à mes amis ! Je n'ai pas de talents particuliers. Je suis juste passionnément curieux. Je n'ai pas échoué, j'ai trouvé dix mille moyens qui ne fonctionnent pas.
ACS Omega, 2019
We report a series of ferrocene-based derivatives and their corresponding oxidized forms in which... more We report a series of ferrocene-based derivatives and their corresponding oxidized forms in which the introduction of simple electron donating groups like methyl or tert-butyl units on cyclopentadienyl-rings afford great tunability of Fe +III /Fe +II redox potentials from +0.403 V down to −0.096 V versus saturated calomel electrode. The spin forbidden d−d transitions of ferrocene derivatives shift slightly toward the blue region with an increasing number of electron-donating groups on the cyclopentadienyl-rings with very little change in absorptivity values, whereas the ligand-to-metal transitions of the corresponding ferricinium salts move significantly to the near-IR region. The electron-donating groups also contribute in the strengthening of electron density of Fe +III d-orbitals, which therefore improves the chemical stability against the oxygen reaction. Further, density functional theory calculations show a reducing trend in outer shell reorganization energy with an increasing number of the electron donating units.
Chemistry of Materials, 2019
Advanced Functional Materials, 2018
Scheme 1. Chemical structure of the ammonium cations reported in 2D/3D perovskite solar cells.
Green Chemistry, 2017
N-Acetylglucosamine and N,N′-diacetylchitobiose are efficiently and selectively produced from chi... more N-Acetylglucosamine and N,N′-diacetylchitobiose are efficiently and selectively produced from chitin biomass by using RTILs and chitinases.
Journal of Molecular Structure, 2015
Fourier transform IR spectra of the first generation dendrons built from thiophosphoryl core with... more Fourier transform IR spectra of the first generation dendrons built from thiophosphoryl core with terminal P-Cl groups, vinyl (G 1) and azide (G 2) functional group at the level of the core have been recorded. The optimized geometries of low energy isomers of G 1 and G 2 have been calculated by density functional (DFT) method at the PBE/TZ2P level of theory. DFT is used for analyzing the properties of each structural part (core, branches, surface). It was found that the repeated branching units of G 1 and G 2 contain planar-O-C 6 H 4-CH=N-N(CH 3)-P< fragments. DFT results for the structure of G 1 and G 2 are in good agreement with X-ray diffraction measurements. A complete vibrational assignment is proposed for different parts of G 1 and G 2. The global and local reactivity descriptors have been used to characterize the reactivity pattern of the core functional and terminal groups. Natural bond orbital (NBO) analysis has been applied to comparative study of charge delocalization. Our study reveals why azide group linked to phosphorus has a different reactivity when compared to organic azides.