氮掺杂中空碳材料的制备及其超级电容性能研究

Preparation of Nitrogen-doped Hollow Carbon Materials and Their Supercapacitor Performance

鉴于传统化石能源的不可再生性,目前针对清洁能源的研究越发紧迫与重要。伴随新能源汽车等一系列以电能为主要动力来源的交通工具的发展,市场对储能器件的要求也日益提升,其中锂电池、燃料电池、超级电容器等方向备受青睐。双层超级电容器由于其充放电行为只涉及物理变化,过冲与过放均不会对其电化学性能产生影响以及速充放电等特点备受市场的期待。本工作采用“一锅煮”的方法合成了性能优异的氮掺杂中空碳材料,并将其应用于超级电容器。通过电化学性能测试发现,氮掺杂以后能够有效提高材料的导电性能,加快离子的传输,在1 A/g恒电流充放电时,比电容可达76 F/g,循环2000次的电容保持率达到98%。

Given the non renewable nature of traditional fossil fuels,research on clean energy is becoming increasingly urgent and important.With the development of a series of transportation vehicles such as new energy vehicles,which mainly rely on electricity as the main source of power,the market's demand for energy storage devices is also increasing,with lithium batteries,fuel cells,supercapacitors and other directions being highly favored.Double layer supercapacitors are highly anticipated in the market due to their charging and discharging behavior only involving physical changes,and their electrochemical performance is not affected by overshoot or over discharge,as well as their fast charging and discharging characteristics.This work adopts a“one pot”method to synthesize nitrogen doped hollow carbon materials with excellent performance,and applies them to supercapacitors.Through electrochemical performance testing,it was found that nitrogen doping can effectively improve the conductivity of the material,accelerate ion transport,and achieve a specific capacitance of 76 F/g under constant current charging and discharging of 1 A/g.The capacitance retention rate after 2000 cycles reaches 98%.