Layer combination controllable carbon material with nano pole of different scale, preparation method and application

Abstract

The invention relates to a method for design advanced materials with nano-scaled structure and techniques for preparing same. In particular, the invention relates to a carbon material capable of controllable laminated combination with the nano-holes of variable sizes and preparation and application thereof. The method comprises the steps of: preparing metal oxide sol in the alkali solution system, which is then mixed with an alcohol solution of an alcohol-soluble resin; the oxide sol being used as the template and water being the resin precipitation agent during the process to directly prepare resin / oxide sol composite system. After solvent removal, carbonization, activation and template removal processes, the carbon material with laminated nano-holes combination is prepared which is of controllable micro-holes proportion, controllable medium-holes aperture and proportion, controllable big-holes aperture and propotion and concentrated distribution of medium-holes and big-holes apertures. The carbon material capable of controllable laminated combination with the nano-holes of variable sizes prepared in the invention is characterized in laminated holes structure, excellent ion transfer performances and high electrochemical active specific surface area and the material is expected to be used as high energy density high power density electrochemical capacitor used electrode material.

Description

technical field [0001] The present invention relates to the design method and preparation technology of advanced materials with nanopore structure, specifically a design and preparation method of a new type of carbon material formed by a controllable combination of nanopores of different scales and its application as an electrode material for electrochemical capacitors . Background technique [0002] As an important energy storage element, electrochemical capacitors have attracted wide attention in various fields. However, conventional capacitors only have microfarads or picofarads of capacitance, which is greatly limited in application. It is very urgent to develop a capacitor with larger capacity, which can provide larger energy density and power density at the same time, and can play a role between batteries and traditional capacitors. As an energy storage device, capacitors need to have excellent instantaneous charge and discharge performance and good cycle performance...

AI Technical Summary

Problems solved by technology

[0003] Although traditional chemical / physical activation methods can prepare activated carbon with a certain mesopore content, these mesopores are relatively small in size and relatively low in content, which limits the improvement of its performance and the broadening of its application range.

However, the process using mesoporous or microporous molecular sieves as a template has the disadvantages of long cycle, high cost, and poor structure reproducibility, which is not conducive to large-scale utilization.

Images