Contact
    Start Publications The liquid ammoniate of sodium iodide as an alternative ...
    ←  Publication Finder
    Attension

    The liquid ammoniate of sodium iodide as an alternative electrolyte for sodium ion batteries: The case of titanium dioxide nanotube electrodes

    Year: 2019

    Journal: Energy Storage Mater., Volume 22, NOV, page 424–432

    Authors: Ruiz-Martinez, Debora; Gomez, Roberto

    Organizations: Ministry of Science, Innovation and Universities [MAT2015-71727-R, RTI2018-102061-B-I00]

    Keywords: Titanium dioxide; Amorphous nanotubes; Inorganic electrolytes; Ammonia solvates; Sodium ion batteries

    Efforts for the development of sodium ion batteries (NIB) are focusing on insertion electrode materials rather than on novel electrolytes. In a radically new approach, sodium insertion into amorphous TiO2 nanotubes, chosen as a typical electrode material for NIBs, is studied for the NaI liquid ammoniate (NaI center dot 3.3NH(3)) and compared with the behavior in typical organic electrolytes (for instance 1M NaClO4 in propylene carbonate, PC). The liquid ammoniate leads to significantly larger electrode capacities (between 0.5 and 2.6 V vs. Na+/Na): 145 mA h g(-1) in NaI center dot 3.3NH(3) versus 105 mA h g(-1) in 1M NaClO4/PC at 1mA cm(-2) (14C for the ammoniate). This is linked to the outstanding conductivity and sodium concentration of NaI center dot 3.3NH(3), together with the much smaller charge transfer resistance observed for this electrolyte. In more general vein, the prospects for using the NaI center dot 3.3NH(3) liquid ammoniate in NIBs are finally discussed.
    View publication