Primary alkaline battery negative electrode material and preparation method thereof

Abstract

The invention discloses a primary alkaline battery cathode material which comprises the following components in parts by weight: 90-98 parts of zinc, 1-7 parts of gel agent, and rare earth oxide less than 0.1% of zinc, wherein 0.9-0.98 parts of zinc and the rare earth oxide form a core-shell nanomaterial; and the rest of zinc is a nanoscale material. The invention further discloses a preparation method of the primary alkaline battery cathode material. The preparation method comprises the steps of preparing a rare earth oxide @ zinc core-shell nanomaterial by a sol-gel method, mixing and dryly stirring the rare earth oxide @ zinc core-shell nanomaterial, zinc powder and the gel agent, adding an electrolyte, performing mixing and wet stirring, and finally performing defoaming treatment to prepare the primary alkaline battery cathode material. The primary alkaline battery cathode material has the benefits that the rare earth oxide @ zinc core-shell nanomaterial is used, so that a hydrogen evolution potential of zinc gel of a cathode is increased; a self-corrosion effect of the cathode is reduced; the leakage resistance is improved; and the service life of a battery is prolonged.

Description

technical field [0001] The invention relates to an electrode of a primary battery, in particular to a negative electrode material of a primary alkaline battery and a preparation method thereof. Background technique [0002] With the development of science and technology and the change of concept, people tend to choose mercury-free alkaline batteries when using batteries, and modern electrical products have higher and higher requirements for battery performance, so a high-performance, low-leakage battery has been developed. Batteries with good comprehensive performance such as liquid rate and long life have been the research direction for a long time. [0003] Rare earth refers to 15 lanthanide elements with atomic numbers from 57 to 71 in the periodic table of elements, and 17 elements in total, scandium (Sc) and yttrium (Y), which have similar chemical properties to lanthanide elements. Rare earths are known as industrial gold. my country's rare earth resources are very ri...

AI Technical Summary

Problems solved by technology

Rare earths are known as industrial gold. my country's rare earth resources are very rich and widely used. They are mainly used in metallurgy, glass, ceramics and other fields. However, in the battery industry, rare earth oxides are rarely used in primary alkaline zinc-manganese batteries. , for example, Chinese patent application CN102931385A discloses a negative electrode material for alkaline batteries and a preparation method thereof. 3+ As the main dopant, the rare earth element M 3+ As a secondary dopant, and the rare earth element ions are sulfate, nitrate, and chloride ions, because it is a secondary alkaline battery, the focus is on the prolongation of the charge and discharge cycle life of the battery, and the rare earth element ion M 3+ As a secondary dopant, it exists in the form of ions and only plays an auxiliary role, assisting the main dopant trivalent metal ion X 3+ Improve battery performance; Chinese patent application CN101176222A discloses a thin sheet alkaline battery, rare earth elements are applied to the sealing metal layer on the surface of the anode in a metallic state, and the sealing metal layer is pre-coated on the surface of the anode current collector to form an alkali-resistant metal oxidation Thin film to improve adhesion, thereby reducing electrolyte leakage, but limited improvement in other performance of the battery

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