Spherical gamma nickel oxyhydroxide, preparation process and application thereof

Abstract

Disclosed a compound ball ª† hydroxyl nickel oxide, its preparing method and application, relates to a compound and a anode material of battery, while the compound has the advantages of better storage ability, high discharge capacity and high packaging density. Wherein, the chemical formula of said compound is ª†-HaKbNac(H2O)dNixM1-XO2 and the method comprises that mixing the nickel salt solution and at least one metal salt solution to attain the solution A; preparing caustic soda or caustic potash solution and adding sodium carbonate or potassium carbonate to attain the solution B; preparing the ammonia solution C; reacting the A, B, and C, processing the solid-liquid separation to attain the ball ª‡ nickel hydroxide; reacting with the oxidant in the solution of caustic soda or caustic potash to attain the black solid-liquid mixture and processing the solid-liquid separation to attain the ball ª† hydroxyl nickel oxide. The invention has better stability which avoids the easy discharge decompounded in lye; therefore, the invention can be used as anode material of battery to attain better storage ability, high discharge capacity, better crystal condition and density while the tap density can reach 1.9 g / cm3.

Description

technical field [0001] The invention relates to a compound and a battery positive electrode material, in particular to a compound which can be used as a novel battery positive electrode material and a preparation method thereof. Background technique [0002] The continuous development of portable electronic products also puts forward new requirements for the batteries used in them. In particular, the ever-emerging and popular digital products put forward higher requirements for batteries. For example, when digital cameras first came out, most models used alkaline manganese batteries, but when alkaline manganese batteries were used in digital cameras that required high-power discharge, the discharge voltage would drop sharply, and only about 10% of the capacity would be used. can not work. As a result, the batteries used in digital cameras are transferred from alkaline manganese batteries to nickel-metal hydride rechargeable batteries and lithium-ion rechargeable batteries....

AI Technical Summary

Problems solved by technology

[0003] However, although spherical β-nickel oxyhydroxide (β-NiOOH) has higher filling density and discharge activity, it is easy to decompose and self-discharge, resulting in poor storage performance of the battery. For this reason, the application number is "positive electrode material" CN01116672.X The patent application for "and nickel-zinc battery" is to place β-NiOOH in a pressure kettle filled with lye, so that β-NiOOH contains alkaline cations to reduce its self-decomposition, but this method is more complicated and difficult, and reduces its self-decomposition ability Also limited, and the theoretical capacity of β-NiOOH can only reach 289mAh / g

The Japanese patent application with the application number JP214621 (1998) proposes to use gamma nickel oxyhydroxide (gamma-NiOOH) as the positive electrode material of the zinc-nickel primary battery. The mass theoretical capacity of NiOOH is more than 1.5 times that of β-NiOOH, but the density of ordinary γ-NiOOH is small, so the filling amount is limited, so the battery can not have a larger volume specific discharge capacity

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