摘要:
An end cap seal assembly for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly comprises a convoluted end cap which may also function as a cell terminal and an underlying insulating sealing disk. The insulating sealing disk comprises a central boss and radially extending arm terminating in a downwardly sloped elbow and upwardly sloped peripheral edge. The end cap disk has at least one vent aperture therethrough which faces the ambient environment. The insulating disk has an annular groove in its top or bottom surface, which preferably circumvents the central boss. The base of the groove defines an a rupturable membrane portion of the insulating sealing disk. The rupturable membrane is designed to rupture, preferably when the cell internal gas pressure reaches a level between about 150 and 900 psig (1034null103 and 6206null103 pascal gage) advantageously, between about 150 and 700 psig (1034null103 and 4827null103 pascal gage).
摘要:
A zinc powder for use in a zinc anode, negative electrode or electrochemical cell including zinc metal or zinc alloy particles. The zinc particles have a narrow particle size distribution and a major portion of the zinc particles having a well controlled chemistry and specific shape, such as teardrop, strand teardrop, acicular or spherical thereby providing improved discharge characteristics and reduced gassing.
摘要:
There is provided an alkaline battery produced by sealing in an outer package body: a positive mixture containing at least one selected from manganese dioxide and a nickel oxide, a conducting agent, and an alkaline electrolytic solution (A) containing potassium hydroxide; a separator; and a negative mixture containing zinc alloy powder, a gelling agent, and an alkaline electrolytic solution (B) containing potassium hydroxide where a concentration of potassium hydroxide of the alkaline electrolytic solution (A) is 45 wt % or more, and a concentration of potassium hydroxide of the alkaline electrolytic solution (B) is 35 wt % or less. Because of this, an alkaline battery can be provided, which has desirable load characteristics, prevents the generation of gas, prevents a decrease in a storage property due to the reaction with an electrolytic solution, and has heat generation behavior suppressed at a time of occurrence of a short-circuit.
摘要:
A battery separator for use in zinc alkaline batteries having improved mechanical strength and higher resistance to oxidation comprising cellulose that has been crosslinked with a hydrocarbon group containing between four and sixteen carbon atoms.
摘要:
An anode paste material for use in zinc-based batteries that is designed to reduce zinc ion diffusion and resultant electrode shape change as well as zinc dendrite formation while optionally allowing for hydrogen permeability through the matrix comprising a regenerated cellulose film containing domains of hydrogen permeable polymer, particles of zinc and zinc oxide surrounded by hydrocarbon beads.
摘要:
An electrochemical cell and an electrode for use in an electrochemical cell is provided. The electrochemical cell has a container, a positive electrode disposed in the container and having a wall defining an interface surface, a negative electrode disposed in the container, a separator located between the positive and negative electrodes, and an electrolyte. The second electrode has a unitary piece of electrochemically active material having multiple openings formed in a circumferential surface. The unitary piece may include a slotted tube, first and second members, or a coiled strip.
摘要:
An electrochemical battery comprising a housing; an electrolyte within the housing; an anode within the electrolyte and the housing and having an anode surface upper portion and an anode surface lower portion; a cathode within the electrolyte and the housing and having a cathode surface upper portion and a cathode surface lower portion at an inter-electrode distance from the anode to operably provide upward laminar flow of the electrolyte from the anode and cathode lower portions to the anode and cathode upper portions; recycle downcomer channel means for effecting and allowing of downward gravity flow of an upper portion of the electrolyte from the anode and cathode surface upper portions to provide a recycled lower portion of the electrolyte for recycle to the anode and cathode. The battery structure provides improved cell power performance, reduces unwanted temperature gradients in the cell, provides uniformity of electrolyte concentration and reduces cell passivation.
摘要:
An electrochemical device of the present invention comprises a positive electrode, a negative electrode and an electrolyte, wherein at least one of the positive electrode and the negative electrode includes a compound having a structure represented by the general formula (1): 1 It is thereby possible to obtain a lightweight and high energy-density electrochemical device having an excellent cycle characteristic.
摘要:
A battery (100) comprises an electrolyte in which a lanthanide and zinc form a redox pair. Preferred electorlytes are acid electrolytes, and most preferably comprise methane sulfonic acid, and it is further contemplated that suitable electrolytes may include at least two lanthanides. Contemplated lanthanides include cerium, praseodymium, neodymium, terbium, and dysprosium, and further contemplate lanthanides are samarium, europium, thulium and ytterbium.