Research network on electrochemical energy storage,
Research center on batteries and supercapacitors

Na-ion batteries: a promising prototype!

Na-ion batteries: a promising prototype!


« Only the sodium is consumed, and the sea itself gives me that. Beyond this, I’ll mention that sodium batteries have been found to generate the greater energy, and their electro-motor strength is twice that of zinc batteries. »

- Captain Nemo
20.000 Leagues Under the Sea
Jules Verne

© Cyril FRESILLON/CSE/CNRS Photothèque

Within the framework of RS2E, a CNRS research network initiated by the Ministry of higher education and research in 2011; CEA, CNRS and Universities’ labs worked together to produce the first Na-ion (sodium-ion) battery in the « 18650 » format, an industry-grade format. Sodium batteries are complementary to lithium batteries but also a potential replacement for some specific uses. They will benefit from a lower cost thanks to, most notably, the abundance of sodium. The CNRS/Universities labs contributed to the materials choice and fundamental research advances, the CEA Liten teams benefitted from their Li-ion expertise to scale up the Na-ion batteries at a prototype level.


The energy density performance (90Wh/kg) are above the expectations especially considering the excellent cycle life (at least 2.000 charge/discharge cycles).

The « 18650 » (1.8 by 6.5 cm) format has been chosen for its wide use by industrials which will make tech transfer easier.

As for applications, Jean-Marie Tarascon, director of RS2E and professor at Collège de France said: “the first application, the most obvious, would be grid storage: storing renewable energy […] we are talking about a market as bug as the EV market”.

© RS2E


Learn more:
Link to the CNRSnews article:
> Link to animated short:
> Link to the CNRS press release :
> Link to researchers' interview:
> Link to Na-ion newsletter subscription:


Members of the project:
CEA Liten, Grenoble
> Chaire chimie du solide et énergie, Paris
(CSE UMR 3677 : UPMC/Collège de France/CNRS)
> Centre interuniversitaire de recherche et d’ingénierie des matériaux, Toulouse
(CIRIMAT UMR 5085 : CNRS/Institut National Polytechnique de Toulouse/Université Paul Sabatier)
> Institut Charles Gerhardt, Montpellier
(ICGM UMR 5253 : ENSCM/CNRS/Université de Montpellier)
> Institut de chimie de la matière condensée, Bordeaux
> Institut de science des matériaux, Mulhouse
(IS2M UMR 7361 : CNRS/Université de Haute Alsace)
> Laboratoire de réactivité et chimie des solides, Amiens
(LRCS UMR 7314 : Université de Picardie Jules Verne/CNRS)


The researchers would like to thank CNRS, CEA, the Ministry of Higher Education, National Education and Research, the National Agency for Research and the Direction Générale de l'Armement for their support and funding.


CNRS press office: Priscilla Dacher : +33 (0)
RS2E communication manager : Clément Colin : +33 (0)