Preparation of nickel-bound porous carbon and its application in supercapacitors

Abstract

In this study, nickel-bound porous carbon (Ni-PC) was prepared by introducing Ni2+ into dipotassium ethylenediaminetetraacetate (EDTA-2K) derived nitrogen-doped porous carbon (PC) using the ball milling method. This solvent-free mechanochemical method...

Hierarchical Nickel Cobalt Phosphide @ Carbon Nanofibers Composite Microspheres: Ultrahigh Energy Densities of Electrodes for Supercapacitors

“…Regarding Ni 2p (Figure 3e), its peaks are mainly centered around 856.0 eV and 873. [33,42]. In regard to the Co 2p XPS spectrum (Figure 3f), the binding energies of 780.1 and 795.2 eV correspond to Co III (Co 2p 3/2 and Co 2p 1/2 ), while the characteristic peaks centered around 804.4 eV (satellite peak), 781.9, and 787.1 eV are attributed to Co II and Co IV , respectively [43][44][45].…”

“…Regarding Ni 2p (Figure 3e), its peaks are mainly centered around 856.0 eV and 873.3 eV, which correspond to Ni 2p3/2 (Ni II ) and Ni 2p1/2 (Ni III ). The broad peaks at 862.0 eV and 880.0 eV are attributed to the oscillating satellite peaks of Ni 2p3/2 and Ni 2p1/2 [33,42]. In regard to the Co 2p XPS spectrum (Figure 3f), the binding energies of 780.1 and 795.2 eV correspond to Co III (Co 2p3/2 and Co 2p1/2), while the characteristic peaks centered around 804.4 eV (satellite peak), 781.9, and 787.1 eV are attributed to Co II and Co Ⅳ , respectively [43][44][45].…”

“…A symmetrical SC device was constructed using a Nafion film (50 µm thickness, N-115, Dupont, Wilmington, DE, USA) as the separator. The specific capacitance (C, F cm −2 ), energy density (E, Wh kg −1 ), and power density (P, W kg −1 ) of these SCs were calculated according to the reported method [33]. Finally, a symmetrical SC demonstrator was further constructed using the as-prepared composite electrodes in the redox electrolyte to light up a light-emitting diode (LED) array.…”

Ni Single Atom Decorated Porous Hollow Carbon Nanosphere‐Based Electrodes for High Performance Symmetric Solid‐State Supercapacitors

“…[26,27] There have been reports of Ni nanoparticle based porous carbon composites that behave as excellent electrode materials for supercapacitors. [27,28] However, the large sizes of the metal atom agglomerated nanoparticles often reduce their surface pseudocapacitance by decreasing the electroactive surface and increase the ion-electron diffusion length associated with the charge storage process. [29] To maximize the utilization of the atomic surface, downsizing the nanoparticles to the atomic level and dispersing them can be an effective and economical way to enhance the capacitive properties.…”

In situ ball-milling gram-scale preparation of polyoxoniobate-intercalated MgAl-layered double hydroxides for selective aldol and Michael addition cascade reactions

“…In order to achieve good dispersion of POMs, ball-milling as a simple and versatile method could engender a large number of fine particles with a high surface area from bulk materials and has attracted growing interest in recent years for applications such as in solvent-free reactions and the activation of oxides, and for the synthesis of a variety of co-crystals, MOFs and metallic compounds. 18,19 However, the dispersion of POMs via a ballmilling strategy is seldom reported. For instance, Wang and co-workers reported a one-pot mechanochemical strategy to synthesize three Keggin-type POMs⊂ZIF composites (BIT-1, BIT-2 and BIT-3), which showed the highest capacity for methylene blue and controlled release of the anti-cancer agent 5-fluorouracil.…”