Process for synthesizing anode material of lithium ion cell

Abstract

The process of synthesizing positive electrode material for lithium ion cell includes the following steps: adding lithium hydroxide aqua homogeneously into soluble salt solution to generate hydroxide precipitate and lithium salt solution until no further reaction; filtering the reaction product to obtain hydroxide filter cake with adsorbed lithium ion; stoving the filter cake and measuring the lithium content in the filter cake; mixing lithium salt in certain amount with stoved filter cake homogeneously and backing at constant temperature for certain time to obtain the positive electrode material for lithium ion cell of molecular expression of Li1+xMO2, with x having the range of -0.1 to +0.2. The present invention uses lithium hydroxide, rather than sodium hydroxide, and there is no need of water washing to eliminate lithium ion attached to the precipitate, resulting in saving in water and lowered cost.

Description

technical field [0001] The invention relates to a method for synthesizing positive electrode materials of lithium ion batteries. Background technique [0002] As a green high-energy power source, lithium ion has been widely valued for more than ten years. It has the characteristics of high energy, good cycle performance and low self-discharge. In order to give full play to the performance characteristics of lithium-ion batteries, researchers around the world are actively studying lithium-ion batteries. Generally speaking, the synthesis of positive electrode materials needs to add sodium hydroxide solution to the soluble salt solution to react to form a precipitate, which often has harmful metal sodium ions attached to it. In order to remove these metal ions, it will take more than three times. Washing with water to remove useless metal ions, these lotions are generally discharged into the environment, causing pollution to the environment. Not only wasting water resources b...

AI Technical Summary

Problems solved by technology

Generally speaking, the synthesis of positive electrode materials needs to add sodium hydroxide solution to the soluble salt solution to react to form precipitates, which often have harmful metal sodium ions attached to them. In order to remove these metal ions, it will take more than three times. Washing with water to remove useless metal ions, these lotions are generally discharged into the environment, causing pollution to the environment

It wastes water resources and pollutes the environment