US 11,962,009 B1 · Low temperature sodium battery comprising an electrochemically active molten inorganic catholyte

Abstract

A high-performance electrochemically active sodium molten salt catholyte enables a dramatic reduction in molten sodium battery operating temperature from near 300° C. to less than 120° C. As an example, stable electrochemical cycling was demonstrated in a high voltage (3.65 V) sodium battery comprising a sodium iodide-gallium chloride (NaI—GaCl3) molten salt catholyte for over 8 months at 110° C. The combination of high voltage, stable cycling behavior, and practical current densities supported by a molten catholyte enables a new generation of transformative high performance, low temperature molten sodium batteries.

Claims16

Dependent claims

A sodium battery, comprising:

an anode current collector,
a sodium-based liquid metal anode,
a nonporous Na+-conducting separator,
an electrochemically active inorganic molten salt catholyte comprising at least one sodium halide salt, at least one gallium halide salt, and at least one aluminum halide salt, and
an inert cathode current collector,
and wherein the inorganic molten salt catholyte comprises from 35 to 55 mol % NaI, (65 to 45)−x mol % AlCl3, and x mol % GaCl3, wherein the x is 0.1 to 5.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/505,413Filed 19 Oct 2021 · continuation in part

Priority

9 Sep 2019

Granted

16 Apr 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 4/582
Of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures,…:…
H01M 4/368
Selection of substances as active materials, active masses, active liquids: liquid depolarisers
H01M 4/38
Selection of substances as active materials, active masses, active liquids: of elements or alloys
H01M 4/381
Of elements or alloys: alkaline or alkaline earth metals elements

Low temperature sodium battery comprising an electrochemically active molten inorganic catholyte

Life of this patent

Low temperature sodium battery comprising an electrochemically active molten inorganic catholyte

Life of this patent

Abstract

Claims16