Publications by Ivan Exnar | EPFL Graph Search

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A novel polyol synthesis was adopted to synthesize nano-structured LiMnPO4. This route yields well-crystallized nanoparticles with platelet morphology that are only similar to 30 nm thick oriented in the b direction. The obtained material presented a good ...

We review herein several important aspects of surface chemistry in Li-ion batteries, and discuss the use of ionic liquids (ILs) for rechargeable Li batteries. We explored the suitability of ILs for 5 V cathodes and Li-graphite anodes. Some advantages of th ...

LiMnPO4 (olivine) was surface-modified by two different complexes: Ru-bis(4,4'-diethoxycarbonyl-2,2'-bipyridine)(4,4'-dicarboxylate-2,2'-bipyridine) and Ru-bis(4-carboxylic acid-4'-carboxylate-2,2'-bipyridine)(4,4'-dinonyl-2,2'bipyridine). These complexes ...

Self-assembled monolayers (SAMs) of redox-active molecules on mesoscopic substrates exhibit two-dimensional conductivity if their surface coverage exceeds the percolation threshold. Here, we show for the first time that such molecular charge transport laye ...

The supramolecular assembly of Ru-bipyridine complex, coded Z-907Na, with single-walled carbon nanotube (SWNT) exhibits unique redox behavior, which is applicable for the nanotube wiring of LiFePO4 (olivine). Cyclic voltammograms of thin films of Z-907Na/S ...

The poor electronic conductivity of LiFePO4 has been one of the major issues impeding it from achieving high power and energy density lithium-ion batteries. In this communication, a novel polymer-wiring concept was proposed to improve the conduction of the ...

The carbon-free LiFePO4 (olivine) was modified by a monolayer coverage with [12-(2,5-di-tert-butyl-4-methoxy-phenoxy)-dodecyl]-phosphonic acid, coded DW. Thin film electrodes were bonded with 5% PVDF and deposited on F-doped SnO2 (FTO) support. The surface ...

The conventional strategy of overcharge protection for lithium ion batteries uses redox molecules having oxidation potential higher than the cathodic materials in the electrolyte. Here we propose a novel approach by using redox molecules having reduction p ...

A compact energy‐storage system based on redox targeting is proposed, by which insulating LiFePO4 particles can be reversibly charged and discharged by redox shuttle molecules (S; see scheme) even in the absence of conducting additives. The energy density ...

The undoped and carbon-free olivine, LiFePO4 was bonded with 5% PVDF, and deposited on F-doped SnO2 support (FTO). The electrodes were modified by a monolayer of three different complexes: NaRu(4,4′-dicarboxylic acid-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipy ...

With the aim of improving the rate capability and the safety of nanocrystalline Li4Ti5O12-based high power lithium ion batteries, two high boiling point nitrile-based electrolytes namely, 3-ethoxypropionitrile (CH3CH2OCH2CH2CN, EPN)/1 M LiTFSI and 3-(2,2,2 ...

Ivan Exnar

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High-performance, nano-structured LiMnPO4 synthesized via a polyol method

A short review on surface chemical aspects of Li batteries: A key for a good performance

Molecular wiring of LiMnPO4 (olivine) by ruthenium(II)-bipyridine complexes

Molecular Wiring of Insulators: Charging and Discharging Electrode Materials for High-Energy Lithium-Ion Batteries by Molecular Charge Transport Layers

Electrochemical Properties of the Supramolecular Assembly of Ruthenium(II)-bipyridine Complex with Single-Walled Carbon Nanotubes

Polymer wiring of insulating electrode materials: An approach to improve energy density of lithium-ion batteries

Molecular wiring of LiFePO4 (Olivine)

A new strategy of molecular overcharge protection shuttles for lithium ion batteries

Redox Targeting of Insulating Electrode Materials: A New Approach to High-Energy-Density Batteries

Molecular Wiring of Olivine LiFeP04 by Ruthenium(II)-Bipyridine Complexes and by Their Assemblies with Single-Walled Carbon Nanotubes

Novel electrolytes for Li4Ti5O12-based high power lithium ion batteries with nitrile solvents

High energy lithium batteries by molecular wiring and targeting approaches

Gelation of Ionic Liquid-Based Electrolytes with Silica Nanoparticles for Quasi-Solid-State Dye-Sensitized Solar Cells

Non-corrosive electrolyte compositions containing perfluoroalkylsulfonyl imides for high power Li-ion batteries

Pseudocapacitive Lithium Storage in TiO2(B)

LiMn0.8Fe0.2PO4: An Advanced Cathode Material for Rechargeable Lithium Batteries

3-Methoxypropionitrile-Based Novel Electrolytes for High-Power Li-Ion Batteries with Nanocrystalline Li4Ti5O12 Anode

High efficiency dye-sensitized nanocrystalline solar cells based on ionic liquid polymer gel electrolyte

Enhancement of Electrochemical Activity of LiFePO4 (olivine) by amphiphilic Ru-bipyridine complex anchored to a Carbon nanotube

Electrochemical and gas-phase photocatalytic performance of nanostructured TiO2(B) prepared by novel synthetic route