Mickael Mateos

French National Centre for Scientific Research | CNRS

Lithium-ion batteries (LiBs) based on insertion electrodes reach intrinsic capacity limits. Performance improvements and cost reduction require alternative reaction mechanisms and novel battery chemistries such as conversion reactions and sodium-ion batteries (NaBs), respectively. We here study the formation of Ti1-xVxH2 hydrides (0 < x < 1) and th...

Rechargeable aqueous aluminium batteries are the subject of growing interest, however, the charge storage mechanisms at manganese oxide‐based cathodes remain poorly understood. In essense, every study proposes a different mechanism. Here, an in situ spectroelectrochemical methodology is used to unambiguously demonstrate that reversible proton‐coupl...

Ambipolar molecular materials hold great promise as a building block of next generation highly efficient, less complex and low cost electronic devices. In this endeavor, the present work reports the fabrication of organic heterojunction devices based on halogenated copper phthalocyanine (CuPc) and lutetium bisphthalocyanine (LuPc2) bilayers, invest...

Rechargeable aqueous aluminium batteries are the subject of growing interest, but the charge storage mechanisms at manganese oxide-based cathodes remain poorly understood with as many mechanisms as studies. Here, we use an original in situ spectroelectrochemical methodology to unambiguously demonstrate that the reversible proton-coupled MnO2-to-Mn2...

p>Rechargeable aqueous aluminium batteries are the subject of growing interest, but the charge storage mechanisms at manganese oxide-based cathodes remain poorly understood with as many mechanisms as studies. Here, we use an original in situ spectroelectrochemical methodology to unambiguously demonstrate that the reversible proton-coupled MnO<sub>2...

On account of their low-cost, earth abundance, eco-sustainability, and high theoretical charge storage capacity, MnO2 cathodes have attracted a renewed interest in the development of rechargeable aqueous batteries. However, they currently suffer from limited gravimetric capacities when operating under the preferred mild aqueous conditions, which le...

Rechargeable batteries based on MnO2 cathodes, able to operate in mild aqueous electrolytes, have attracted attention due to their appealing features for the design of low‐cost stationary energy storage devices. However, the charge/discharge mechanism of MnO2 in such media is still a matter of debate. Here, an in‐depth quantitative spectroelectroch...

On account of their low-cost, earth abundance, eco-sustainability, and high theoretical charge storage capacity, MnO₂ cathodes have attracted a renewed interest in the development of rechargeable aqueous batteries. However, they currently suffer from limited gravimetric capacities when operating under the preferred mild aqueous condition...

p>Rechargeable batteries based on MnO2 cathodes, able to operate in mild aqueous electrolytes, have attracted remarkable attention due to their appealing features for the design of low-cost stationary energy storage devices. However, the charge/discharge mechanism of MnO2 in such media is still unclear and a matter of debate. Here, an in-depth quan...

The energy barrier of an organic heterojunction built on ITO electrodes and made from a low conductive sublayer (Cu(F16Pc)) covered by a highly conductive semiconductor (LuPc2) is modulated by electrografting of organic layers before depositing the sublayer. Impedance spectroscopy clearly demonstrates the increase of the energy barrier at the ITO –...

We report on a new hybrid heterojunction gas-sensitive device combining a molecular material with a metal oxide. WO3 was synthesised via the aerosol-assisted chemical vapour deposition technique from tungsten hexacarbonyl precursor. Onto the inorganic film, LuPc2 was vacuum evaporated. The morphology of the WO3-LuPc2 hybrid films is dominated by th...

We present a new device called double lateral heterojunction (DLH) as ammonia sensor in humid atmosphere. It combines polyani-line derivatives in their poor conducting state with a highly conductive molecular material, lutetium bisphthalocyanine, LuPc2. The polyaniline and poly(2,5-dimethoxyaniline) are electrodeposited on ITO interdigitated electr...

Polymer films of poly(2,3,5,6-tetrafluoroaniline) (PTFA) were electroplated on ITO substrates from an acidic solution of the monomer by chronoamperometry. Electrochemical and morphological characterizations were performed and compared to these of polyaniline. The PTFA film presents a poor conductivity due to the absence of acid-base doping and a qu...

L’électronique organique reste un domaine de recherche prolifique grâce à la diversité de structures moléculaires accessible par la synthèse organique. Les matériaux moléculaires offrent des possibilités de mises en forme inédites comme les techniques de dépôt en solution, utilisables dans la conception de dispositifs organiques sur supports plasti...

In this work, we report for the first time on a comprehensive study of poly(2,3,5,6-tetrafluoroaniline (PTFANI). Contrary to the non fluorinated polyaniline or its analogues bearing one fluorine atom, PTFANI is a poorly conductive material. We present a comprehensive study of the electrosynthesized PTFANI from its monomer in acidic aqueous medium....

Polyaniline (PANI) with electrodonating and electrowithdrawing substituents were electrodeposited and studied as sensing materials in resistors and heterojunctions. Whereas the dimethoxyaniline leads to a highly conductive material, the tetrafluoroaniline leads to a poor conducting polymer. However, this latter was used in heterojunctions, associat...

Molecular semiconductor-doped insulator (MSDI) heterojunctions were designed using a new family of sublayers, namely triphenodioxazines (TPDO). The device obtained by combining the tetracyano triphenodioxazine bearing two triisopropylsilylethynyl moieties as a sublayer with the lutetium bisphthalocyanine (LuPc2) as a top layer showed a nonlinear cu...