荞麦芯衍生的富氮和富氧可控多孔碳用于高性能超级电容器

1 Introduction

With the improvement of the requirements of the living environment and the rapid development of economy, people have problems in the storage and utilization of energy. With the large-scale development and utilization of new energy, the existing energy storage equipment has been unable to meet the demand for energy source storage. Supercapacitor (SC), a potential energy storage device, has attracted much attention on account of its advantages (such as fast charge propagation dynamics, high power density and long cycle life) which may replace commercial batteries [1-2]. Generally speaking, supercapacitors include electric double layer capacitors (EDLCs) and pseudocapacitors (PCs), considering the different energy storage mechanisms [3-4]. The former mainly generates stored energy through the adsorption of pure electrostatic charges on the electrode surface. PC stores energy through rapid surface redox reactions [5]. The structure and characteristics of electrode materials determine the charge storage mechanism of supercapacitors, which determines the electrochemical performance of supercapacitors [6-8].