摘要:
Alkaline electrochemical cells containing no added mercury and having a concentration of potassium hydroxide in the electrolyte, prior to discharge, of between about 34 and 37 % (w/v solution) and wherein the amount of electrolyte is such that, after a calculated level of one electron discharge of the manganese dioxide, the calculated concentration of potassium hydroxide is between 49.5 and 51.5 % (w/v solution), have superior performance in intermittent discharge tests.
摘要:
Electrodes and electrolytes for nickel-zinc secondary battery cells possess compositions that limit dendrite formation and other forms of material redistribution in the zinc electrode. In addition, the electrolytes may possess one or more of the following characteristics: good performance at low temperatures, long cycle life, low impedance and suitability for high rate applications.
摘要:
An alkaline battery cell with increased discharge capacity is provided. Both the internal volume and the electrode interfacial surface area are increased, without unnecessarily increasing the overall cell volume, by increasing the height but not the diameter of the electrodes, thereby avoiding an unnecessary increase in the total cell volume.
摘要:
A flat, flexible electrochemical cell is provided. The within invention describes various aspects of the flat, flexible electrochemical cell. A printed anode is provided that obviates the need for a discrete anode current collector, thereby reducing the size of the battery. An advantageous electrolyte is provided that enables the use of a metallic cathode current collector, thereby improving the performance of the battery. Printable gelled electrolytes and separators are provided, enabling the construction of both co-facial and co-planar batteries. Cell contacts are provided that reduce the potential for electrolyte creepage in the flat, flexible electrochemical cells of the within invention.
摘要:
An alkaline battery cell with increased discharge capacity is provided. Both the internal volume and the electrode interfacial surface area are increased, without unnecessarily increasing the overall cell volume, by increasing the height but not the diameter of the electrodes, thereby avoiding an unnecessary increase in the total cell volume.
摘要:
Alkaline battery cells comprising an anode, a cathode, a separator between the anode and the cathode, and an electrolyte are provided with an n-type metal oxide additive that improves electrochemical performance. The n-type metal oxide additive is either a doped metal oxide comprising a metal oxide modified by incorporation of a dopant, or a reduced metal oxide. The metal oxide may be selected from the group consisting of BaTiO3, K2TiO3, CoTiO3, SrTiO3, CaTiO3, MgTiO3, SiO2, CaO, TiO2, CoO, Co3O4, ZnO, SnO, SnO2, PbO2, Bi2O3, Bi2O3•3ZrO3, Bi12TiO20, Fe2O3-TiO2, Nb2O5, CaWO4, ZnMn2O4, and K2Cr2O7. Examples of dopant disclosed are: NbO2, Nb2O5, Ta2O5, WO3, GeO2, ZrO2, SnO2, ThO2, Fe2O3, In2O3, LiNiO2, and P2O5, In2O3, Sb2O5.
摘要:
Alkaline electrochemical cells containing no added mercury and having a concentration of potassium hydroxide in the electrolyte, prior to discharge, of between about 34 and 37 % (w/v solution) and wherein the amount of electrolyte is such that, after a calculated level of one electron discharge of the manganese dioxide, the calculated concentration of potassium hydroxide is between 49.5 and 51.5 % (w/v solution), have superior performance in intermittent discharge tests.
摘要:
An electric cell using aluminum in a negative electrode has a positive electrode (3, 4), the negative electrode (1) containing aluminium or aluminium alloy, and an electrolyte arranged between the positive electrode and the negative electrode. The electrolyte includes: at least one ion selected from a group of a sulfate ion (SO 4 2- ) and a nitrate ion (NO 3 - ); and an additive. The additive is selected from an organic acid, a salt of the organic acid, an hydrate of the organic acid, an ester of the organic acid, an ion of the organic acid, and derivatives thereof. Thus, the electric cell of the present invention using aluminum in a negative electrode allows the improvements in the voltage and the capacity of the cell as the generation of gas depending on the self-discharge can be prevented.
摘要:
Embodiments are related to ionic liquids and more specifically to ionic liquids used in electrochemical metal-air cells in which the ionic liquid includes sulfonate ions as the anion.
摘要:
An embodiment of the invention provides for an electrochemical cell comprising: a fuel electrode comprising a metal fuel, a second electrode, an ionically conductive medium communicating the electrodes, the ionically conductive medium comprising at least two different additives, wherein at least one additive is selected from the group consisting of: macroheterocyclic compounds, phosphonium salts, hetero-ionic compounds and their derivatives; and, at least one additive is selected from the group consisting of: macroheterocyclic compounds, phosphonium salts, hetero-ionic compounds, and their derivatives. The fuel electrode and the second electrode are operable in a discharge mode wherein the metal fuel is oxidized at the fuel electrode functioning as an anode, whereby electrons are generated for conduction from the fuel electrode to the second electrode via a load. An ionically conductive medium and methods of operating an electrochemical cell are also disclosed.