Nickelous compound anode material used in nickel-hydrogen battery and preparation technique

Abstract

The invention relates to a nickelous compound anode material used in nickel-hydrogen battery, belonging to the technical field of electrode material preparation technique in chemical engineering. Capacitor material NiO is doped into cobalt-covered nickel hydroxide in certain proportion to be active material of the anode of the nickel hydroxide battery, wherein the mass percentage of nickel oxide and cobalt-covered nickel hydroxide are respectively 1-19% and 99-90%, NiO is prepared by heat treatment on nanometer alpha-Ni(OH)2, and metal cation is doped in alpha-Ni(OH)2 synthesis process, and the doped metal cation is one or more than one of Al, Cu, Y, Mn, Zn, Co, Cr and Fe. The invention is simple in technique, the condition is easy to control, electrochemical performance of the obtained material is steady, and charging and discharging test shows that the large multiplying power discharge specific capacity is high, and operation voltage is stable, thus being applicable to be anode active material of MH / Ni battery.

Description

technical field [0001] The invention relates to a nickelous composite positive electrode material for nickel-hydrogen batteries and a preparation process, belonging to the technical field of chemical electrode material manufacturing processes. Background technique [0002] Ni-MH battery is a more environmentally friendly power source than conventional batteries. It has the advantages of high energy density, high power density, and overcharge and discharge resistance. It has become a hot topic in the research of new chemical power sources. At the same time, because of its unique advantages such as large energy storage, high power, light weight, and long cycle life, it is used as a backup power source, such as temporary lighting, heating, electric water pumping, and computer backup power; In research and development, nickel metal hydride batteries have attracted much attention as a relatively ideal power source. Electric vehicles require their power supplies to have good high...

AI Technical Summary

Problems solved by technology

[0003] Nickel-metal hydride batteries use nickel electrodes as the positive electrode material, and the main component is Ni(OH) 2 , β-Ni(OH) is usually used in industrial production 2 , its theoretical specific capacity is 289mA h / g, which cannot meet the higher energy storage demand

In addition, due to the obvious heat generation of nickel-metal hydride power batteries during charging and discharging, the precipitation potential of oxygen under high temperature conditions is lower than that at normal temperature, resulting in low utilization of active materials during high current charging and discharging. Therefore, the high temperature and high current performance of the battery poor

However, electric vehicles urgently need to supply high-current pulse electric energy when starting, climbing and accelerating. When braking, kinetic energy needs to be converted into electric energy and stored at high current. The existing nickel-metal hydride batteries are difficult to meet the requirements.

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