One-step nitrogen, boron codoping of porous carbons derived from pomelo peels for supercapacitor electrode materials

Enhanced photocatalytic activity of porous TiO2 containing C/P/K derived from grapefruit peel

“…To achieve the experimental goal while saving energy, the process parameters of the calcination stage were set as follows: the grapefruit peel loaded with precursor was calcined in a muffle furnace under an air atmosphere, with the temperature rising at a rate of 5 °C min −1 from room temperature to 550 °C, followed by a three-hour heat preservation phase, and then naturally cooled to room temperature. According to the added amount of TBOT, the resultant samples were recorded as CPK-TiO 2 -x (x = 10, 15,20,25). In order to facilitate comparison, control samples without grapefruit peel templates were also prepared under the same conditions, referred to as N-TiO 2 -x (x = 10, 15, 20, 25).…”

Functionalized layered double hydroxides for innovative applications

“…Supercapacitors are an important class of electrochemical energy storage device, they possess the characteristics of high power density, fast charge/discharge rate, excellent cycling life, low cost, and safe operational conditions. [293][294][295][296] However, they present a low energy density, limiting the optimal discharge time to less than a minute, whereas many applications clearly require more. 293,297,298 Therefore, one of the challenges posed for supercapacitors is to increase energy density without compromising power density, or, alternatively, to achieve a proper balance between the two.…”

Morphology regulation of conductive metal–organic frameworks in situ grown on graphene oxide for high-performance supercapacitors

“…6 EDLCs store charges by accumulating charges on the interfaces between electrodes and electrolytes, which is similar to traditional capacitors. 7,8 A large specific surface area can enhance the charge storage ability of EDLCs, and well-controlled hierarchical pores can improve the rate performance by reducing the charge transfer resistance in electrode materials. 9 Pseudo-capacitors store charges through a prompt and reversible Faraday reaction, 10,11 resulting in better capacitance values than those of EDLCs.…”