Performance of Partially Exfoliated Nitrogen-Doped Carbon Nanotubes Wrapped with Hierarchical Porous Carbon in Electrolytes.

摘要: The preparation of highly conductive, high-surface-area, heteroatom-doped, porous carbon nanocomposite materials with enhanced electrochemical performance for sustainable energy-storage technologies, such as supercapacitors, is challenging. Herein, a route the large-scale synthesis nitrogen-doped wrapped partially exfoliated nanotubes (N-PPECNTs) an interconnected hierarchical structure, advanced electrode material that can realize several potential applications energy storage, presented. Polypyrrole conductive polymer acts both nitrogen and sources contribute to pseudocapacitance. Partially (PECNTs) provide high specific surface area ion charge transportation act matrix. derived N-PPECNT displays content 6.95 at %, 2050 m2  g-1 , pore volume 1.13 cm3 . N-PPECNTs, exhibit excellent capacitance 781 F g-1 at 2 A g-1 cycling stability 95.3 % over 10 000 cycles. Furthermore, symmetric supercapacitor exhibits remarkable densities 172.8, 62.7, 53.55 Wh kg-1 in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([BMIM][TFSI]), organic, aqueous electrolytes, respectively. Also, biocompatible hydrogel gel electrolyte based, stable, flexible supercapacitors could be demonstrated.