Bacterial-Cellulose-Derived Carbon Nanofiber@MnO_2 and Nitrogen-Doped Carbon Nanofiber Electrode Materials: An Asymmetric Supercapacitor with High Energy and Power Density

摘要

Nowadays, supercapacitors have drawn extensive attention because they can instantaneously transport a higher power within a very short period than rechargeable batteries, and they possess higher energy density than conventional dielectric capacitors, which make them promising for applications such as backup/auxiliary power sources of electric vehicles and stand-by power systems. However, commercial supercapacitors suffer from a low energy density; certain fields, such as load-leveling and large industrial equipment, need supercapacitors with higher energy and power density to optimize their performance. Therefore, it is essential to improve the energy density of supercapacitors significantly to meet the pressing requirements.