Lithium ion battery preparation method based on macropore carbon electrode

Abstract

The invention relates to a modern battery industry, and in particular relates to a lithium ion battery preparation method based on a macropore carbon electrode. The lithium ion battery preparation method comprises the following steps: 1, preparation of raw materials; 2, preparation of SiO2; 3, preparation of C / SiO2; and 4, preparation of C / SiO2 / Sb2O3. According to the lithium ion battery preparation method, electric active substances are introduced into a macropore structure, so that the use of an adhesive can be avoided, and the internal resistance of the battery can be reduced; furthermore, the forms of the electric active substances can be effectively protected, so that the stability of the battery is enhanced; by the macropore structure, electrolyte can penetrate into the electrode to be a necessary channel for lithium ion transmission.

Description

technical field [0001] The invention relates to the modern battery industry, in particular to a method for preparing a lithium ion battery based on a macroporous carbon electrode. Background technique [0002] In recent years, antimony and antimony-based oxides have attracted attention due to their high theoretical specific capacity and good safety, but their volume changes greatly during the lithium intercalation process, so their cycle performance is not good. The study combines the stability of carbon materials with the high capacity of metals or their oxides through composite means, but the idea is undoubtedly correct, but there are some difficulties in specific experiments, such as the combination of activated substances and conductive substances is not uniform and firm enough ; The addition of a binder causes poor conductivity; the effect of the volume expansion of the active material on the cycleability of the electrode has not been effectively controlled. The...

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Problems solved by technology

[0002] In recent years, antimony and antimony-based oxides have attracted attention due to their high theoretical specific capacity and good safety, but their volume changes greatly during the lithium intercalation process, so their cycle performance is not good.

The study combines the stability of carbon materials with the high capacity of metals or their oxides through composite means, but the idea is undoubtedly correct, but there are some difficulties in specific experiments, such as the combination of activated substances and conductive substances is not uniform and firm enough ; The addition of a binder causes poor conductivity; the effect of the volume expansion of the active material on the cycleability of the electrode has not been effectively controlled. These problems cannot be overcome by powder electrode materials, so it is particularly important to construct new electrode materials