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Nickel-hydrogen low self-discharge battery
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A self-discharging and battery technology, applied in the direction of nickel storage battery, battery electrode, alkaline storage battery, etc., can solve the problems of not being able to store for a long time, large battery self-discharging, fast power loss, etc., to achieve slow power loss, good charge retention, Small effect of self-discharge
Inactive Publication Date: 2010-06-02
MCNAIR TECH
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[0005] Therefore, the existing nickel-hydrogen secondary batteries have the disadvantages of large battery self-discharge, poor charge retention, the user needs to charge before use, the battery cannot be stored for a long time after charging, and the power loss is fast.
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[0022] Battery positive: see figure 1 , by electroless plating or oxidation on Ni-containing 2+ , Zn 2+ 、Co 2+ Ordinary spherical nickel hydroxide particles with equal elements 1 are slightly coated with a layer of Co 3+ Layer 2, Co 3+ The content is 3.0% of the total weight of the particles, thus forming nickel hydroxide particles with special properties 3. With nickel hydroxide as the main active material, 1% CaF 2 Additives are added to nickel hydroxide particles with special properties, prepared as dry powder or added with 0.25% (wt%) carboxymethylcellulose sodium (CMC), 1.5% (wt%) polytetrafluoroethylene emulsion and 27% ( wt%) water to prepare a wet slurry, then fill the active material into the foamed nickel matrix, dry and press to form a positive electrode sheet.
[0023] Battery negative electrode: Mg-based superlattice alloy powder is used as the main active material. Add 0.5% (wt%) C modified product and 0.5% (wt%) acetylene black to the main body of the all...
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Abstract
The invention provides a ni-mh low self-discharge battery, including an anode, a cathode, electrolyte and a battery film, wherein the anode adopts the way of filling the Ni(OH)2 active materials on the froth nickel base, to form the Ni(OH)2 electrode; a layer of Co<3+> is slightly coated on the surface of the common spheric nickel hydroxide particles, to form the nickel hydroxide particles with specific performance, meanwhile at least one of the oxide, the hydroxid, the fluoride, the sulfide or the R salt R of Ca, Mn, Er, Y, Yb, W is added as the additive in the Ni(OH)2 electrode; the cathodeadopts Mg superlattice alloy powder, through adding one or a plurality of kinds of the C modifier(s), the conductive agent(s), and one or a plurality of kinds of hydroxypropyl methylcellulose, polytetrafluoroethylene emulsion solution and carboxylated styrene butadiene latex are adopted to compose the special adhesive, thereby improving the performance of the anode. Therefore, the invention has small self-discharge, better charged maintenance, slow heat loss after being charged, long storage.
Description
technical field [0001] The invention relates to the technical field of nickel-hydrogen low self-discharge battery manufacture, in particular to a low self-discharge nickel-hydrogen battery. Background technique [0002] Existing primary batteries, such as: carbon-zinc batteries, alkaline batteries, mercury batteries, lithium batteries, etc. are ready-to-use and can be stored for a long time, but they cannot be recycled, which increases the cost of use and seriously pollutes the environment. From the perspective of environmental protection, the use of rechargeable and reusable secondary batteries is advocated, such as: nickel-cadmium rechargeable batteries, nickel-metal hydride rechargeable batteries, lithium rechargeable batteries, lead-acid batteries, and solar batteries. [0003] Ni-MH battery is an early substitute product of Ni-Cd battery. The appearance of Ni-MH battery and Ni-Cd battery is similar, and the positive pole of Ni-MH battery is basically the same as that of...
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