Method for manufacturing nickel hydrogen battery
A technology of nickel-hydrogen battery and manufacturing method, applied in nickel storage battery, electrode manufacturing, battery electrode and other directions, can solve the problems of capacity balance destruction, reduction of battery capacity, end of battery life, etc.
Inactive Publication Date: 2007-03-28
GS YUASA INT LTD
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Problems solved by technology
As a result, the capacity balance of the negative and positive electrodes is disrupted, thereby reducing the capacity of the battery and ultimately ending the life of the battery
Method used
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[0047] The following are examples of the present invention, but it should be understood that the present invention is not limited to the following examples.
[0048] (Synthesis of Nickel Hydroxide Particles)
[0049] Zinc is described as an example of an element selected from Group 2A or 2B of the Periodic Table of the Elements. 2dm dissolved in 2.0mol nickel sulfate, 0.12mol zinc sulfate and 0.05mol cobalt sulfate 3 Add 1 dm of ammonium sulfate containing 1 mol of ammonium sulfate to the aqueous solution 3 aqueous solution. Subsequently, an aqueous sodium hydroxide solution having a concentration of 40 wt % was added thereto to keep the pH of the resulting mixture at 10 to 13, thereby obtaining an ammonia complex. Then, the temperature of the reaction system was maintained at 40°C to 50°C under vigorous stirring, and an aqueous solution of sodium hydroxide was added dropwise thereto to adjust the pH of the reaction system to 10.5 to 11.5. Continue stirring for about 12 ho...
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Abstract
A subject for the invention is to provide a sealed nickel-hydrogen cell which has an increased capacity attained by reducing the initial generation of a negative-electrode discharge reserve and which has excellent discharge performance, e.g., high-rate discharge performance, and has high productivity. The invention provides a process for producing a sealed nickel-hydrogen cell which has positive-electrode active material particles constituted of a core layer comprising, as the main component, nickel compounds including nickel oxyhydroxide and a surface layer covering the core layer and comprising a cobalt compound and further has hydrogen-absorbing alloy particles, the process comprising the step of oxidizing the core layer and the cobalt contained in the surface layer of the positive-electrode active material before cell assembling, the step of conducting a charge-discharge operation at least once after cell assembling, and the step of conducting aging after the charge-discharge operation.
Description
technical field [0001] The present invention relates to a method for manufacturing a nickel-hydrogen battery (nickel metal hydride battery), wherein the positive electrode of the nickel-hydrogen battery is mainly composed of nickel hydroxide, and the negative electrode contains a hydrogen storage alloy. Background technique [0002] Compared with nickel-cadmium batteries, nickel-hydrogen batteries have higher energy density, and because nickel-hydrogen batteries do not use cadmium, they cause less pollution to the environment. Therefore, nickel-metal hydride batteries are widely used as power sources in devices such as cell phones, power tools, and personal computers. With the development of the above-mentioned devices toward miniaturization, light weight, and multi-functionality, the battery as its power source is also required to have a small volume and a high capacity. [0003] A nickel-metal hydride battery consists of a positive electrode containing a nickel hydroxide-...
Claims
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IPC IPC(8): H01M10/30H01M4/52H01M4/04H01M4/36H01M10/34H01M10/44
CPCY02E60/124H01M10/345H01M4/52H01M10/446H01M4/366H01M4/04Y10T29/49108Y02E60/10Y02P70/50
Inventor 古川健吾金本学黑葛原実绵田正治押谷政彦
Owner GS YUASA INT LTD