Incorporation of homogeneous Co₃O₄ into a nitrogen-doped carbon aerogel via a facile in situ synthesis method: implications for high performance asymmetric supercapacitors

Abstract

A novel high-performance electrode material, nitrogen-doped carbon aerogel/cobalt oxide (NCA/Co3O4) material, was prepared by a facile, one step and in situ coating method, followed by a freeze-drying process.

Core–Shell Nitrogen‐Doped Carbon Hollow Spheres/Co3O4 Nanosheets as Advanced Electrode for High‐Performance Supercapacitor

“…It is worthy to note that these values are higher than its counterparts, Co 3 O 4 ‐NRs||AC (16.2 Wh kg −1 at 792.8 W kg −1 ), and AC||AC (6.3 Wh kg −1 at 507.8 W kg −1 ). The performance is also better than other similar materials reported in literature: Co 3 O 4 @hollow carbon fiber||AC (24.3 Wh kg −1 at 750 W kg −1 ), Co 3 O 4 /N‐doped carbon aerogel||N‐doped carbon aerogel (33.43 Wh kg −1 at 375 W kg −1 ), and MnO 2 /NHCS||NHCS (26.8 Wh kg −1 at 233 W kg −1 ) . It can be attributed to the contribution of higher specific capacitance of Co 3 O 4 /NHCS.…”

“…), Co 3 O 4 /N‐doped carbon aerogel|| N‐doped carbon aerogel (ref. ), and MnO 2 /NHCS||NHCS (ref. ).…”

Recent Advance in Co3O4 and Co3O4-Containing Electrode Materials for High-Performance Supercapacitors

“…Furthermore, CA can be modified by other materials. For example, a novel high-performance Co 3 O 4 /nitrogen-doped carbon aerogel (NCA) electrode material was prepared via the in situ coating method followed by the freeze-drying process [100]. The Co 3 O 4 /NCA composite exhibited a Cs of 616 F•g −1 at 1 A•g −1 and an excellent rate capability of 445 F•g −1 at 20 A•g −1 .…”

The construction of a sandwich structured Co3O4@C@PPy electrode for improving pseudocapacitive storage

“…According to the charge storage mechanism, electrochemical capacitors can be classied into pseudocapacitors and electric double layer capacitors (EDLCs). [1][2][3][4][5] Although EDLC electrode materials, such as graphene, carbon nanotubes and activated carbon, usually have high specic surface area and excellent electric conductivity, their capacities have not satised the high energy demand in electric vehicles or other applications. [6][7][8][9][10][11][12][13][14][15][16][17] Thus, effective solutions leading to increased energy storage should be explored.…”