Find the best CNRS technologies to boost your innovative project.
06.11.2018
Materials – Coating 07293-01
06.11.2018
Materials – Coating 10581-01
06.11.2018
Chemistry / Environment 08758-01
06.11.2018
11127-01
06.11.2018
Environment and Energy 11107-01
19.10.2018
Medical Diagnostic 08504-01
We can guide you through the whole technology transfer process.
Thanks to our expertise, our network and our know-how of the innovation ecosystem, we support you throughout your project.
04634-01
French patent application FR1156007 filed on July 4th, 2011 and entitled «Matière active d’électrode pour une batterie aux ions sodium»
Jean-Marie TARASCON
Premkumar SENGUTTUVAN
Rosa Maria PALACIN
Exclusive or non-exclusive license
Laboratoire de Réactivité et Chimie des Solides, (LRCS UMR6007) Amiens, France
There are currently some discussion about Li-ion battery especially related to their cost. Raw lithium material costs is almost multiply by 2 since the first Li-ion battery in 1991 and is still increasing due to the market demand. In addition there is some concern about the lithium ressource which is located only in a few places and which could not cope with the dramatically increasing demand due to auomotive transportation and grid related applications.
Na-ion batteries could become an alternative thank to the better availability of Na and the lower cost of its precursors.
Lot of work was dedicated to cathode material but graphite whch is widely used as anode, is not as suitable as for Li due to the size difference of ionic radius of Na ion (>55% Li-ion).
Current material such as hard carbon or even Sb are not satisfactory. Hard carbon exhibits a capacity fading due to passivation layer onto the carbon surface.
In the present work, the inventors have developped a new anodic material for Na-ion battery based on derivative of Na2Ti3O7.
The active material of the electrode material is composed of an oxide with astructure corresponding to the layered structure of the compound Na2Ti3O7, said oxide conforming to the formula NaxTi(IV)aTi(III)bMcO7, in which x denotes the number of Na+ ions inserted between the layers, per Ti3O7 structural unit, with 0<x≤5; Ti(IV) and Ti(III) represent titanium in the oxidation states IV and III, respectively; M represents one or more elements selected from 3d transition metalsand 4d transition metals.
The electrode material is obtained by electrochemical reduction of an oxide Nax’Ti(IV)a’McO7.
Low cost precursor materials
Availibility of sodium
No need of high temperature such as in Zebra type batteries
Suitable process for 1-2-gram scale synthesis;
Na-ion anode in replacement of hard carbon
For further information, please contact us (Ref 04634-01)
06.11.2018
Materials – Coating 07293-01
06.11.2018
Materials – Coating 10581-01
06.11.2018
Chemistry / Environment 08758-01
06.11.2018
11127-01
06.11.2018
Environment and Energy 11107-01
19.10.2018
Medical Diagnostic 08504-01