Patent ID: 8906542
Filing Date: 2014-12-09
Classification: H01M,Y02E

Abstract:
1. A sodium-ion electrochemical cell capable of operating at an ambient temperature of 20 to 25° C. and comprising a cathode, an anode, and a non-aqueous sodium-containing electrolyte therebetween; wherein the electrolyte comprises a sodium salt dissolved in a liquid organic carrier; the cathode comprises at least one transition metal chalcogenide compound in an initial discharged or partially discharged state and having the formula Na x MX 2 Cl n prior to first discharge of the cell, wherein 0<x≦1; M is a transition metal having a +3, +4, or +5 fully discharged oxidation state, when x is 1; X is at least one chalcogen selected from the group consisting of S and Se; and n is 0 when the discharged oxidation state of M is +3, n is 1 when the discharged oxidation state of M is +4, and n is 2 when the discharged oxidation state of M is +5.