One-step construction of hierarchically porous carbon nanorods with extraordinary capacitive behavior

Monodisperse Porous Carbon Nanospheres with Ultra‐High Surface Area for Energy Storage in Electrochemical Capacitors

“…The more favourable (wider) pore size distribution of this material favours the unrestrained sorption of the ionic liquid ions at fast rates, which allows taking full advantage of this high voltage electrolyte. The excellent values of capacitance and rate capability of the nanoparticles in the organic electrolytes were confirmed by cyclic voltammetry experiments (see Figure S10) and compared favourably with those of other recently reported materials for high power capacitive systems, including carbon nanoparticles, [20,55,56] microspheres, [29,57,58] and hierarchically porous carbons [59–62] (see Table S2). The cycling stability of the supercapacitors operating in the organic electrolytes was studied over 10000 cycles of charge‐discharge at a current density of 10 A g −1 .…”

Synthesis of Hierarchically Porous Carbon with Tailored Porosity and Electrical Conductivity Derived from Hard–Soft Carbon Precursors for Enhanced Capacitive Performance

“…11−14 Porous carbons, one of the most cost-efficient electrode materials, have attracted intense interest in energy storage. 15,16 Compared with graphene and carbon nanotubes, porous carbons own the advantages of high surface area for charge accommodation and they can be prepared from various lowcost raw materials, such as lignin, 17,18 cellulose, 19 rice husks, 20 corn stalks, 21 potato peels, 22 and pitch, 23 via various methods including physical/chemical activation, soft/hard templating, and other emerging strategies. 24,25 Generally, the capacitive performance of porous carbons is mainly determined on the surface area and the pore structure.…”

“…Porous carbons, one of the most cost-efficient electrode materials, have attracted intense interest in energy storage. , Compared with graphene and carbon nanotubes, porous carbons own the advantages of high surface area for charge accommodation and they can be prepared from various low-cost raw materials, such as lignin, , cellulose, rice husks, corn stalks, potato peels, and pitch, via various methods including physical/chemical activation, soft/hard templating, and other emerging strategies. , Generally, the capacitive performance of porous carbons is mainly determined on the surface area and the pore structure. The micropores (<2 nm) are the active sites for ion storage which contribute the major capacitance, the mesopores (2–50 nm) provide the ion-transport channels, and the macropores (>50 nm) are able to shorten the ion diffusion distance. , The hierarchically porous structure is highly desired to develop the synergistic contribution from multiscale pores for fast and efficient energy storage.…”

Recent advances in carbon-based supercapacitors

“…Further, 1D carbon nanofibers and nanorods could afford shortcut channels for electron transfer, and they can be readily shaped into relevant geometries or assembled with functionalized modules for preparing advanced CSs. [47][48][49][50][51][52] For instance, Xu's group demonstrated the preparation of carbon nanorods via the self-sacrificial thermal conversion of rod-like MOF precursors that were prepared by the salicylic-acid-modulated hydrothermal reaction of 2,5-dihydroxyterephthalic acid and zinc nitrate, and the as-obtained carbon nanorods could be further transformed into graphene nanoribbons featuring comparable electronic properties via the sonication-activation treatment. 53 Zhang's group utilized the self-assembly of chitin fibers in urea/NaOH solution to fabricate unique elastic microspheres with a carbon nanofiber framework and high surface area of over 1000 m 2 g À1 .…”