Preparation method and application of nitrogen-doped porous carbon negative electrode material

Abstract

The invention belongs to the technical field of carbon material preparation, belongs to the category of alkali metal ion secondary energy storage and relates to a method for preparing nitrogen-doped porous carbon from perinone nitrogen-containing polycyclic aromatic hydrocarbon as a carbon source and an application of the nitrogen-doped porous carbon as a negative electrode or positive electrode material for an alkali metal ion secondary battery. According to the method, perinone nitrogen-containing conjugated polycyclic aromatic hydrocarbon is firstly mixed with a template or an activator andthermal decomposition carbonization is carried out at the temperature within a certain range to obtain a nitrogen-doped porous carbon negative electrode or positive electrode material. By adopting the perinone nitrogen-containing conjugated polycyclic aromatic hydrocarbon with large molecular weight as the carbon source, the loss of a nitrogen element in a thermal treatment process can be reduced, high-proportion nitrogen doping in the porous carbon is effectively achieved and electrochemical oxidation reduction sites are effectively increased. According to the method, the specific surface area of the porous carbon can be adjusted and controlled through the carbon source screening, thermal treatment carbonization temperature and the mass ratio of the template or the activator, the chargeexchange interface is increased and high energy storage is effectively achieved. The material has the advantages that (1) the structure is abundant and the perinone material is cheap and available; and (2) the material has relatively high energy density, magnification power density and cycling stability.

Description

technical field [0001] The invention specifically relates to a preparation method of nitrogen-doped porous carbon negative electrode materials, and relates to the steps and raw materials used in the preparation process of these materials. technical background [0002] In the electronic information age, people's demand for portable, high-power, and highly intelligent power supply equipment is increasing day by day, making high-performance energy storage systems a common topic in the field of energy research and application that needs to be realized urgently. Driven by multiple objective forces such as the reduction of traditional energy reserves, global warming, and the increasing protection of the living environment, the way of energy production and use is changing to a new type of clean energy. Nowadays, the emergence of high-efficiency secondary energy storage devices and key technologies and materials provides the preferred option for convenient energy and power support f...

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