42results about How to "Inhibition of self-discharge" patented technology

The purpose of the present invention is to provide a zinc negative electrode mixture for forming the negative electrode for a safe and economic battery exhibiting excellent battery performance, and a gel electrolyte or a negative electrode mixture which can be suitably used for forming a storage battery exhibiting excellent battery performances such as a high cycle characteristics, rate characteristics, and coulombic efficiency while inhibiting passivation and morphology of an electrode active material such as dendrite and shape change in the electrode active material. Another purpose of the present invention is to provide a battery using the zinc negative electrode mixture or the gel electrolyte. A zinc negative electrode mixture (1) containing a zinc-containing compound and a conductive auxiliary agent, wherein the zinc-containing compound and / or the conductive auxiliary agent contain particles having an average particle size of 1000 [mu]m or less and / or particles having an aspect ratio (vertical / lateral) of 1.1 or more. A gel electrolyte (2) used in a battery, the gel electrolyte being characterized by having a cross-linking structure formed by a multivalent ion and / or an inorganic compound. A negative electrode mixture (3) used in a battery, the negative electrode mixture being characterized by containing a negative electrode active material and a polymer.

Provided is a power storage device separator that is realized in the form of a heat-resistant, solvent-resistant, and dimensionally stable thin film. Also provided is a power storage device separator that can be realized in the form of a thin film and that has excellent ion permeability and low resistance. Shorting between electrodes and self-discharge are unlikely to occur in the latter separator, and in addition, durability is excellent even after long periods of use in high-temperature environments in the presence of organic solvents and ionic solutions.

A positive electrode plate (3) of a nickel-metal hydride battery contains nickel hydroxide particles (18), a coating layer (19) covering at least a part of the surface of each nickel hydroxide particle (18) and mainly composed of a cobalt compound having an average valence of cobalt more than 2, and additives (15, 16) respectively containing Nb and Y and distributed among the nickel hydroxide particles (18). A negative electrode plate (4) contains a hydrogen storage alloy having a Co content of not more than 2.0% by mass, and a separator (5) contains a fiber having a sulfone group. An alkaline electrolyte solution contains sodium hydroxide as the main solute.

This nickel hydrogen secondary battery (2) is provided with an outer package can (10) and an electrode group (22) that is hermetically sealed within the outer package can (10) together with an alkaline electrolyte solution. The electrode group (22) is composed of a positive electrode (24) and a negative electrode (26), which are laminated with a separator (28) being interposed therebetween. The alkaline electrolyte solution contains NaOH as a main component of the solute. The negative electrode (26) contains a hydrogen storage alloy which has a composition represented by general formula Ln1-xMgxNiy-zMz (wherein Ln represents one or more elements selected from among rare earth elements and Zr; M represents Al; subscripts x, y and z respectively satisfy 0 <= X<= 0.05, 3.3 <= y <= 3.6 and 0 <= z <= 0.50; and the ratio of La among the rare earth elements in Ln is 25% or less).

The present invention relates to an alkaline accumulator; wherein, at least one of the surface of the membrane, the positive plate and the negative plate contains metallic compound; at least one of the positive plate and the negative plate contains the dissolvable metal; and the metallic compound makes the dissolvable metal dissolved from the alkaline electrolyte be separated out at the surface of the membrane, the surface or the inside of the positive plate, or the surface of the inside of the negative plate. Consequently, an alkaline accumulator which promises seldom self discharge and has long service life can be available.

A positive electrode plate (3) of a nickel-metal hydride battery contains nickel hydroxide particles (18), a coating layer (19) covering at least a part of the surface of each nickel hydroxide particle (18) and mainly composed of a cobalt compound having an average valence of cobalt more than 2, and Nb-based particles (15) and Y-based particles (16) distributed among the nickel hydroxide particles (18). A negative electrode plate (4) contains a hydrogen storage alloy having a Co content of not more than 2.0% by mass, a separator (5) contains a fiber having a sulfone group, and an alkaline electrolyte solution contains sodium hydroxide as the main solute.

This nickel hydrogen secondary battery 2 is provided with: an outer casing can 10; and an electrode group 22 that is contained within the outer casing can 10 together with an alkaline electrolyte solution in a hermetically sealed state. The electrode group 22 is composed of a positive electrode 24 and a negative electrode 26, which are superposed on each other with a separator 28 being interposed therebetween. The negative electrode 26 contains a hydrogen storage alloy powder that is an aggregate of hydrogen storage alloy particles. If M is the average particle diameter of the hydrogen storage alloy particles, P is the particle diameter equal to 1 / 2 of M, and Q is the particle diameter equal to 1 / 3 of M, the content of the particles having particle diameters of P or less is less than 20% by mass of the whole hydrogen storage alloy powder, and the content of the particles having particle diameters of Q or less is less than 10% by mass of the whole hydrogen storage alloy powder.

There is provided a low-cost alkaline storage battery separator capable of implementing stable fiber spinning and excellent ammonia trapping function so as to control self-discharge. Spinning fiber using resin including 1.0 mass % or greater of low crystalline polyolefin, crystalline polyolefin and maleic anhydride-modified polyolefin corresponding to a maleic anhydride component content of 3.5 to 35 mass % in the fiber assures stability during fiber spinning. Moreover, making a nonwoven fabric using the fiber act as a separator allows a high level of ammonia trapping function and controls self-discharge of the alkaline storage battery.

A nonaqueous electrolyte battery includes: a cathode using a composite compound of lithium and a transition metal as a positive electrode active material; an anode using a negative electrode active material capable of doping or extracting lithium; and a nonaqueous electrolyte sandwiched between the anode and the cathode. By dissolving LiMFm (where M is an element selected from As, B, P and Sb, and m is an integer ranging from 4 to 6) and LiCnF2n+1SO3 or LiN(CnF2n+1SO2)2 in the In the non-aqueous solvent of cyclic carbonate or non-cyclic carbonate, add more than or equal to 0.1 volume % and less than or equal to 5 volume % of unsaturated carbonate to obtain non-aqueous electrolyte solution, LiCnF2n+1SO3 or LiN (CnF2n+ The concentration of 1SO2)2 is greater than or equal to 1 wt% and less than 10 wt%. Therefore, self-discharge is suppressed, and storage resistance is improved.

The object of the present invention is to provide a non-aqueous electrolyte that can suppress gas generation during high-temperature storage, prevent the expansion of the packaging material of the casing, and can also suppress self-discharge in a high-temperature environment, and has improved charge-discharge cycle characteristics. The non-aqueous solvent in the non-aqueous electrolyte comprises ethylene carbonate, propylene carbonate, γ-butyrolactone, and the aforementioned ethylene carbonate, the aforementioned propylene carbonate, and the aforementioned γ-butyrolactone as the fourth component. Solvents other than lactones, corresponding to the aforementioned non-aqueous solvents as a whole, when the proportions of ethylene carbonate, propylene carbonate, γ-butyrolactone and the aforementioned fourth component are respectively recorded as x volume %, y volume %, For z volume % and p volume %, the aforementioned x, the aforementioned y, the aforementioned z, and the aforementioned p satisfy 15≤x≤50, 2≤y≤35, 30≤z≤85, and 0<p≤5, respectively.

A binder composition for electrodes, comprising a polymer and an aqueous medium, wherein the polymer consists of a polymer (A) which has a HOMO value calculated by a semiempirical molecular orbital method of -10 eV or less, a difference between its LUMO value calculated by the semiempirical molecular orbital method and its HOMO value of 10.5 eV or more and a fluorine atom content measured by combustion ion chromatography of 2 to 30 mass%. An electrochemical device obtained from the above binder composition for electrodes of the present invention can retain adhesion even in a high-temperature environment and its self-discharge in a high-temperature environment is highly suppressed.

The invention is a new battery with oxygen ion conduction, which uses the oxide of a relatively inactive metal (such as copper, etc.) as the positive electrode, the active metal (such as iron, zinc, etc.) . During the discharge process, the oxygen ions in the metal oxide of the positive electrode enter the electrolyte, the positive electrode is reduced to a simple metal, the oxygen ions are transported to the negative electrode through the electrolyte, and form oxides with the negative metal; the charging process is the opposite. Therefore, the charge and discharge of the battery depends on the migration of oxygen ions in the electrolyte between the positive and negative electrodes to achieve charge and discharge, and the difference in the binding energy between the positive and negative metals and oxygen stores electrical energy. The metal materials and electrolytes of the battery are rich in sources and cheap, the battery manufacturing process is simple, and the metal electrodes are convenient to recycle, which is suitable for large-scale energy storage.

The invention provides a long-life zinc-based liquid flow battery. The negative electrode of the battery includes a three-dimensional conductive carbon material and an inert conductive material; the thickness of the inert conductive material is 20%-50% of the three-dimensional conductive carbon material. The negative electrode and the battery of the present invention can effectively inhibit the self-discharge reaction of the positive electrode active material of the battery and the negative electrode active material in contact, improve the coulombic efficiency of the battery, and induce the reaction interface of zinc deposition to occur inside the electrode, thereby improving the coulombic efficiency of the zinc-based flow battery. efficiency.