Preparation method of ZnO/sisal fiber-based carbon composite material and application thereof

Abstract

The invention discloses a preparation method of a ZnO / sisal fiber-based carbon composite material and an application thereof. The preparation method comprises the steps of first, pretreating a sisal fiber, mainly treating surface impurities and low polymer molecules of the sisal fiber through an acid-alkali two-step treatment method; and then preparing the ZnO / sisal fiber-based carbon composite material by taking the pretreated sisal fiber and zinc hydroxide as raw materials and adopting an in-situ carbon-thermal synthesis method. The prepared ZnO / sisal fiber-based carbon composite material isapplied to preparation of a negative electrode material; and the abovementioned material has good hydrogen evolution inhibition and electrochemical performance through detection and analysis of an electrochemical workstation.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method and application of a ZnO / sisal fiber-based carbon composite material. Background technique [0002] With the development of new energy and non-fossil energy, the effective development of new energy vehicles has become a major trend, and the application of lead-carbon batteries in the fields of new energy vehicle batteries and energy storage batteries has great prospects and opportunities. As a combination of lead-acid batteries and supercapacitors, lead-carbon batteries not only have the specific energy advantages of lead-acid batteries and good charge and discharge performance, but also combine the advantages of supercapacitors with instantaneous large-capacity charging, and have broad market prospects. [0003] However, lead-carbon batteries add a carbon material with a hydrogen evolution overpotential lower than that of the lead surface in t...

AI Technical Summary

Problems solved by technology

[0003] However, lead-carbon batteries add a carbon material with a hydrogen evolution overpotential lower than that of the lead surface in the negative electrode, which intensifies the hydrogen evolution phenomenon. The current solution is to add a hydrogen evolution inhibitor to the lead-carbon battery negative electrode to suppress the hydrogen evolution phenomenon. Most of the additives are directly added to the negative electrode. Although this suppresses the occurrence of hydrogen evolution at the negative electrode, it also causes the pores of some carbon materials to be blocked by the hydrogen evolution inhibitor, preventing the electrode reaction from occurring, resulting in attenuation of battery life.

Images