Abstract:
Sodium metal-halide energy storage devices utilizing a substituting salt in its secondary electrolyte can operate at temperatures lower than conventional ZEBRA batteries while maintaining desirable performance and lifetime characteristics. According to one example, a sodium metal-halide energy storage device operates at a temperature less than or equal to 200 °C and has a liquid secondary electrolyte having M x Na 1 - y AlCl 4-y H y , wherein M is a metal cation of a substituting salt, H is an anion of the substituting salt, y is a mole fraction of substituted Na and CI, and x is a ratio of y over r, where r is the oxidation state of M. The melting temperature of the substituting salt is less than that of NaCl.
Abstract:
An energy storage device comprising an anode, electrolyte, and cathode is provided. The cathode comprises a plurality of granules comprising a support material, an active electrode metal, and a salt material, such that the cathode has a granule packing density equal to or greater than about 2 g/cc. A cathode comprising greater than about 10 volume % total metallic content in a charged state of the cathode is also provided.
Abstract:
The present disclosure is directed to an energy storage device having improved thermal performance. More specifically, the energy storage device includes a housing with side walls that define an internal volume. The side walls include bottom and front side walls, with the front side wall having an air inlet and outlet configured to circulate cooling air therethrough. The energy storage device also includes a plurality of cells arranged in a matrix within the internal volume atop the bottom side wall. Further, the cells define a top surface. Further, the energy storage device includes an exhaust manifold adjacent to the front side wall between at least a portion of the cells and the air inlet. Thus, the exhaust manifold is configured to direct airflow from the top surface towards the bottom side wall and then to the air outlet so as to provide an airflow barrier between cooling air entering the air inlet and the cells.
Abstract:
An electrochemical cell includes a negative electrode having a first liquid phase having a first active metal, a positive electrode having a second liquid phase having a second active metal, and a liquid electrolyte having a salt of the first active metal and a salt of the second active metal. The electrochemical cell also includes a bipolar faradaic membrane, disposed between the negative electrode and the positive electrode, having a first surface facing the negative electrode and a second surface facing the positive electrode. The bipolar faradaic membrane is configured to allow cations of the first active metal to pass through and to impede cations of the second active metal from transferring from the positive electrode to the negative electrode and is at least partially formed from a material having an electronic conductivity sufficient to drive faradaic reactions at the second surface with the cations of the positive electrode.
Abstract:
A positive electrode composition is described, containing granules of at least one electroactive metal and at least one alkali metal halide. The granules have a substantially spheroidal shape. An energy storage device and an uninterruptable power supply device are also described. They include compartments for positive and negative electrode compositions; a solid separator capable of transporting alkali metal ions between the compartments; and associated current collectors for the electrodes. The positive electrode composition contains substantially spheroidal granules. Related methods for the preparation of an energy storage device are also disclosed.
Abstract:
An article is provided. The article may include an electrochemical cell. The cell may include a molten electrolyte, and at least one molten electrode. The cell may include a structure for separating an anode from a cathode, while enabling ionic communication between the anode and cathode. An energy storage device comprising the article is also provided. Methods related to the article and the energy storage device may be provided.
Abstract:
The disclosure provides seals for devices that operate at elevated temperatures and have reactive metal vapors, such as lithium, sodium or magnesium. In some examples, such devices include energy storage devices that may be used within an electrical power grid or as part of a standalone system. The energy storage devices may be charged from an electricity production source for later discharge, such as when there is a demand for electrical energy consumption.
Abstract:
A battery cell with a magnesium and beta alumina current collector includes a magnesium core with a beta alumina covering and bare magnesium collectors. The preferred embodiment uses a two chamber battery cell with a ceramic separator, where the cathode chamber contains the current collector and a compound of 38% common salt (NaCl) containing 80 micrograms of Iodine (I) per gram of common salt (NaCl), 18% Iron (Fe), 15% Zinc, (Zn), 16% Copper (Cu), 5% Nickel (Ni) and 4% Silver (Ag), and the anode chamber contains a compound of 38% common salt (NaCl) containing 80 micrograms of Iodine (I) per gram of common salt (NaCl).
Abstract:
An additive that is added to the NaAlX 4 electrolyte for use in a ZEBRA battery (or other similar battery). This additive has a moiety with a partial positive charge (δ+) that attracts the negative charge of the [AlX 4 ] - moiety and weakens the ionic bond between the Na + and [AlX 4 ] - moieties, thereby freeing some Na + ions to transport (move). By using a suitable NaAlX 4 electrolyte additive, the battery may be operated at much lower temperatures than are typical of ZEBRA batteries (such as, for example, at temperatures between 150 and 200°C). Additionally, the additive also lowers the viscosity of the electrolyte solution and improves sodium conductivity. Non-limiting examples of the additive SOCl 2 , SO 2 , dimethyl sulfoxide (DMSO, CH 3 SOCH 3 ), CH 3 S(O)Cl, SO 2 Cl 2 . A further advantage of using this additive is that it allows the use of a NaSICON membrane in a ZEBRA-type battery at lower temperatures compared to a typical ZEBRA battery.