Electrochemical Performance of Carbon Nanorods with Embedded Cobalt Metal Nanoparticles as an Electrode Material for Electrochemical Capacitors

A novel cobalt–carbon composite for the electrochemical supercapacitor electrode material

“…Therefore, existence of Co nanoparticles are beneficial for transmission of electron in solution and conductive to increase of capacitance. The porous carbon also provides both sufficient ion transport routes and elastic buffers for releasing the strain in the process of ion conduction [19]. The results of CV clearly illustrate that well-organized interleaved structure consisting of metallic cobalt particles and carbon facilitates Faraday reaction of metallic cobalt.…”

“…In general, cobalt metal can exist in hexagonal closed packed (HCP) and face centered cubic (FCC) structures. However, HCP phase cannot be stable at higher temperature [18,19], therefore a single phase FCC structure was observed from the XRD pattern. The above observation shows that the samples were free from cobalt carbide (CoC) or cobalt oxides (Co 3 O 4 and CoO).…”

Unusual increase in the electric double-layer capacitance with charge–discharge cycles of nitrogen doped single-walled carbon nanotubes

“…Both of these methods are known as post-synthesis doping. 13 18 23-26 Single-walled carbon Nanotubes (SWCNTs) are one of the promising materials for energy storage applications. However, due to the existence of van der Waals forces between the tubes, they tend to group into bundles, which limits the surface area that can be used for several energy …”

“…[1][2][3][4] The effects of nitrogen doping can be seen in the enhanced capacitive behavior of N -doped carbon materials used in supercapacitors or lithium ion batteries. [4][5][6][7][8][9][10][11][12][13][14] It has been also demonstrated that nitrogen doped carbon can act as the effective metal-free catalysts for oxygen reduction reaction (ORR) of fuel cell due to the electron donor states of nitrogen species. [15][16][17][18] The unique ORR catalytic properties of nitrogen-doped carbon materials were also utilized for the air-electrodes of metal-air cells, which have a much higher specific energy density than LIB electrodes.…”

Activated Carbon Fibers with Hierarchical Nanostructure Derived from Waste Cotton Gloves as High-Performance Electrodes for Supercapacitors

“…It is well known that the supercapacitive performance of PCMs strongly depends on their nanostructure. Although clear efforts aimed at designing advanced PCMs with well-defined nanostructure for optimizing supercapacitive properties are hot research aspects, e.g., carbon nanospheres [13, 14], carbon nanotubes [15, 16], and carbon nanorods [17, 18], their practical applications are significantly limited by the high cost, multi-step processes, and heavily usage of toxic strong oxidants [19]. …”