An all-solid state NASICON sodium battery operating at 200 °C

Fabrication and performances of all solid-state symmetric sodium battery based on NASICON-related compounds

Replacing organic liquid electrolyte with inorganic solid electrolytes (SE) can potentially address the inherent safety problems in conventional rechargeable batteries However, solid-state batteries (SSBs) have been plagued by the relatively low ionic conductivity of SEs and large charge-transfer resistance between electrode and SE Here, a new design strategy is reported for improving the ionic conductivity of SE by self-forming a composite material An optimized Na+ ion conducting composite electrolyte derived from the Na1+ n Zr2Si n P3− n O12 NASICON (Na Super Ionic Conductor) structure is successfully synthesized, yielding ultrahigh ionic conductivity of 34 mS cm−1 at 25 °C and 14 mS cm−1 at 80 °C On the other hand, in order to enhance the charge-transfer rate at the electrode/electrolyte interface, an interface modification strategy is demonstrated by utilization of a small amount of nonflammable and nonvolatile ionic liquid (IL) at the cathode side in SSBs The IL acts as a wetting agent, enabling a favorable interface kinetic in SSBs The Na3V2(PO4)3/IL/SE/Na SSB exhibits excellent cycle performance and rate capability A specific capacity of ≈90 mA h g−1 is maintained after 10 000 cycles without capacity decay under 10 C rate at room temperature This provides a new perspective to design fast ion conductors and fabricate long life SSBs

A Self-Forming Composite Electrolyte for Solid-State Sodium Battery with Ultralong Cycle Life

Philippe Vernoux,*,† Leonardo Lizarraga,† Mihalis N. Tsampas,† Foteini M. Sapountzi,† Antonio De Lucas-Consuegra,‡ Jose-Luis Valverde,‡ Stamatios Souentie, Costas G. Vayenas, Dimitris Tsiplakides, Stella Balomenou, and Elena A. Baranova †Universite de Lyon, Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS, Universite Claude Bernard Lyon 1, 2 Avenue A. Einstein, 69626 Villeurbanne, France ‡Departamento de Ingenieria Quimica, Facultad de Ciencias y Tecnologias Quimicas, Universidad de Castilla-La Mancha, Avenida Camilo Jose Cela 10, 13005 Ciudad Real, Spain LCEP, Caratheodory 1 Street, Department of Chemical Engineering, University of Patras, Patras GR-26500, Greece Division of Natural Sciences, Academy of Athens, Panepistimiou 36 Avenue, GR-10679, Athens, Greece Chemical Process Engineering Research Institute (CPERI), Centre for Research and Technology−Hellas (CERTH), Thessaloniki, Greece Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis-Pasteur Ottawa, Ontario K1N 6N5, Canada

Ionically conducting ceramics as active catalyst supports.

An all-solid state symmetric monolithic sodium ion battery operating at 200 � C is described, using NASICON-type electrodes and electrolyte. Na3V2(PO4)3 is used at both electrodes as the active material while Na3Zr2Si2PO12 stands the role of the Na þ solid electrolyte. Both compositions present order- disorder phase transitions and present decent ionic conductivity properties, 1.5 � 10 � 3 Sc m � 1 and 1.9 � 10 � 4 Sc m � 1 at 200 � C for Na3Zr2Si2PO12 and Na3V2(PO4)3, respectively. The full battery (560 m mi n thickness) was assembled in a 10 0 single step by spark plasma sintering at 900 � C. The electrochemical

U. von Alpen

Papers

Phase transition in nasicon (Na3Zr2Si2PO12)

The effect of hydrogen on the ionic conductivity in lithium nitride