Method for improving capacity of cornstalk carbon-based super-electric material by using ammonium salt

Abstract

The invention belongs to the technical field of energy materials, and particularly relates to a method for improving the capacity of a cornstalk carbon-based super-electric material by using ammoniumsalt. The method provided by the invention comprises the steps that (1) pretreatment: a straw is cut, added with ammonium salt and pure water, sealed in an autoclave, and then subjected to hydrothermal reaction to acquire a preliminary product; suction filtration is carried out to acquire a sample; sample is dried in a dry box to acquire product carbon; (2) calcination carbonization: the product carbon in (1) is placed in a tube furnace, and heating, heat preservation, carbonizing are carried out under gas protection to acquire a carbonized sample; (3) coating: the carbonized sample is weighedand mixed and ground with polytetrafluoroethylene until the carbonized sample is pulverized into tiny particles; isopropanol is added into the ground material to dissolve the material; the material is evenly coated on clean carbon cloth; and (4) electrochemistry performance testing is carried out. The method provided by the invention has the advantages of simple operation, recyclability, being non-poisonous to the environment, low required temperature, high output and high commercial application value, and is free of complicated and expensive instruments and equipment.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a method for removing carbon and calcium impurities in corn stalks by using ammonium salts so as to increase the capacity of corn stalk carbon-based superelectric materials. Background technique [0002] The new supercapacitor has the characteristics of higher energy density and more environmental protection and safety, and it has gradually come into people's sight. Most of its negative electrode materials are carbon electrode materials. However, mineral carbon resources are decreasing day by day, requiring us to find better carbon sources to replace traditional carbon materials, as natural polymers, biomass is an excellent carbon precursor in terms of sustainability, cost and performance [4] , abundant, easy-to-obtain and low-cost renewable biomass resources have therefore become a research hotspot in the field of energy. The key is to prepare it as an adva...

AI Technical Summary

Problems solved by technology

The key is to prepare it as an advanced and efficient energy storage material. However, plant carbon materials contain a large amount of non-conductive materials, which limits their wide application as electrode materials in the energy field. It is urgent to find a simple and effective method to remove these non-conductive materials. It can be effectively applied in lithium batteries and supercapacitors to meet the needs of advanced and efficient energy storage materials in the rural science and technology agriculture policy and in the energy field

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