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Solid electrolytes

A superior energy density

Solutions for batteries and supercapacitors

By offering improved conductivity and durability with foolproof safety, this technology lends itself particularly well to constrained uses such as those related to mobility. Its compatibility with a wide range of electrodes, including high-potential ones, makes this range of electrolytes particularly versatile. Furthermore, they offer a superior energy density per volume unit.

Solid electrolytes can be directly integrated with the appropriate electrodes using a patented process, saving both resources and time.

Process Electrolytes solides / Solid state electrolytes
Manufacturing and Integration Process for Electrolyte / Electrode Pairs

Generations of solid polymer electrolytes

To lower costs and intensify the production chain, the electrolytic membrane is produced by extrusion, via the mixing of a polymerized ionic liquid and a non-polymerized one.

The resulting membrane can be used in combination with all commercial electrodes, or in combination with treated electrodes, and without the use of organic solvents. As a reminder, the active materials are mixed with the anolyte or catholyte, and the laminated electrodes are obtained ready for assembly. The plan ahead is to improve and scale up the production process without solvents.

Generation 0 & 1
Non-optimized solid polymer electrolyte film, R&D stage (σ = 8.10-⁴¹ at 25°C).
Generation 2
1 Ah prototype cell.
Implementation of a pilot line producing 60 kg/month.
Generation 3
Improved conductivity: 0.7 Pilot line production increased to 180 kg/month.
Production expectations: 2026 : 130 tons/year
2030 : 4800 tons/year


Projet R&D Epsilon


As part of the France 2030 plan – Innovative solutions and technologies for batteries – SOLVIONIC’s EPSILON R&D project has
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Projet R&D HYDRA


Hybrid power-energy electrodes for next generation lithium-ion batteries Personal electronic devices, electric vehicles… The lithium-ion (Li-ion) battery is a technology
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The Future Battery Industries Cooperative Research Centre fosters the growth of the battery industries to power Australia's future. We bring
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méthode de préparation d'une électrode pour batterie à base de liquide ionique

Electrode for ionic-liquid batteries

Method for preparing an electrode with high load per unit of mass filled with electrolyte for a battery with high
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AXELERA is the Chemistry-Environment competitiveness cluster based in Auvergne-Rhône-Alpes. It brings together, in France and internationally, the players involved in
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Soteria is a consortium of major players in battery technology. With over 70 patents already registered, the union aims to
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Projet R&D BATT4EU


BATT4EU is a Co-programmed Partnership established under Horizon Europe, the Framework Programme for Research and Innovation of the European Union.
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Illustration processus de fabrication d’un électrolyte polymère gélifié

Process for manufacturing and use of a gel polymer electrolyte

The invention relates to a process for manufacturing a gelled polymer electrolyte (GPE), comprising the steps of: solubilizing a polymer
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Liquid-Processed Solid-State Li-metal Battery: Development of upscale materials, processes and architectures.
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Projet R&D UncorrelaTEd


Solid-liquid thermoelectric systems with uncorrelated properties.​ Thermoelectricity, which can be used to recover energy from waste heat, is a niche
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Compositions liquides à base de liquides ioniques pour la protection de pièces en lithium métal, méthodes de revêtement et de polymérisation associées et système de stockage électrochimique

Liquid compositions based on ionic liquids for the protection of lithium metal parts

An ionic liquid-based composition for protecting lithium metal anodes in a lithium-based electrochemical energy storage systeme, comprising a polymerizable ionic
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Illustration du procédé de fabrication d'électrode pour supercondensateur à base de liquide ionique

Method and apparatus for making electrodes for an ionic liquid-based supercapacitor

Process and device for manufacturing electrodes for a supercapacitor based on ionic liquid A method for making an electrode for
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Projet R&D Si-DRIVE


Silicon alloying anodes for high energy density batteries comprising lithium rich cathodes and safe ionic liquid-based electrolytes for enhanced high
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Training programme in new-generation polymers for energy storage The POLYSTORAGE ETN project aims to design high-quality training courses in the
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Projet R&D Seventh Framework Programme

Seventh Framework Program (FP7)

Interfaces of Fluid Electrodes: New Conceptual Explorations The Influence project aims to improve the fundamental understanding and control of the
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Our range of ionic liquids including electrolytes can be ordered online from Solvionic website.