35results about How to "Low self-discharge" patented technology

An electrochemical cell with an alkali metal containing anode having high discharge capacity, charge efficiency and low self-discharge. The addition of at least one nitramide or dinitramide salt of a metal cation to the electrochemical cell electrolyte unexpectedly lowers first cycle irreversible capacity, adds higher cycle life, lowers self-discharge and beneficially addresses several additional degrees of freedom with respect to electrolyte solvent selection while providing higher charge capacity. Additives include the lithium metal salts of nitramide or dinitramide, and the electrolyte consists essentially of a lithium metal salt dissolved in a at least one of an aqueous solvent, molten salt solvent system and a non-aqueous solvent mixture of at least one of organic ethers, esters, carbonates, acetals.

A method of modifying a carbonate layer formed on a surface of an electrochemical cell component is provided. The surface includes a ceramic oxide. The carbonate layer includes a carbonate and is substantially non-conductive to lithium ions and sodium ions. The method includes contacting the carbonate layer with a modifying agent to form a mixture and causing the modifying agent to incorporate into the carbonate layer and form a modified hybrid layer including a eutectic mixture of the modifying agent and the carbonate. The modified hybrid layer is conductive to lithium ions and sodium ions.

A solid-state chemical current source and a method for increasing a discharge power thereof are disclosed. The current source can be used in electrochemical engineering, in particular for primary and secondary solid-state chemical power sources. The solid-state chemical current source comprises a body provided with current leading-out wires and solid-state galvanic cells which are arranged therein, are connected to the current leading-out wires, are based on solid ion conductors and perform the function of heating elements. A heat insulation for reducing heat losses of the heated galvanic cells is arranged inside and\or outside the body. The inventive method for increasing the discharge power of the solid-state chemical current source by heating it consists in using the heat produced by the electric current flowing through the galvanic cells and in maintaining the hot state of the said galvanic cells during the discharge.

An electric window dimming device for reducing the light transmission of a window for an aircraft. The electric window dimming device comprises a capacitance. The electric window dimming device is adapted for being connected to the capacitance and to a primary energy source that provides energy. If the primary energy source fails, the capacitance supplies energy for electric window dimming device.

The invention discloses a composite positive electrode material for reducing the self-discharge degree, which is made of thermal battery active positive electrode material, polar thiophilic fixing material, potassium-containing electrolyte and high-conductivity conductive agent, and the mass ratio of the above raw materials is: heat Battery active positive electrode material: polar thiophilic fixing material: potassium-containing electrolyte: high-conductivity conductive agent = 50-90: 2-40: 10-30: 0.1-5. The preparation method of the present invention can reduce the self-discharge degree of thermal battery composite positive electrode material with excellent performance and high consistency, and the prepared composite positive electrode material can significantly reduce the self-discharge degree of thermal battery positive electrode material at low current density, which can significantly reduce The capacity loss caused by the self-discharge of the sulfide positive electrode of the thermal battery at a lower current density improves the output specific capacity of the positive electrode of the thermal battery at a lower current density, significantly prolongs the working time, and is suitable for thermal batteries that work for a long time.

The present invention provides a sulfur-carbon composite material, said composite material comprising a porous carbon substrate containing both micropores and mesopores and sulfur, wherein the sulfur is only contained in the micropores of the carbon substrate. Moreover, a lithium-sulfur battery with its cathode comprising said sulfur-carbon composite material and the method for preparing such material is also provided.