Hydroxy functionalized ionic liquids as promising electrolytes for supercapacitor study of α-Fe2O3 thin films

Are Fractal-Like Structures Beneficial for Supercapacitor Applications? A Case Study on Fe2O3 Negative Electrodes

“…The surface areas and the pore size distributions of ferns, flakes, and microspheres are estimated through Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) analyses, respectively . The N 2 -physisorption isotherms of ferns, flakes, and microspheres are shown in Figure a and are similar to those reported for α - Fe 2 O 3 in the literature. − All of the morphologies exhibit type-IV isotherms . The flakes do not show any hysteresis, whereas the ferns and microspheres show a H3-type hysteresis .…”

“…36 The flakes do not show any hysteresis, whereas the ferns and microspheres show a H3-type hysteresis. 36 The isotherms suggest the presence of mesopores in these morphologies, 38 which is confirmed by the pore size distributions shown in Figure 4b. The distributions suggest that the dominant pore size is ∼3.6 nm for both ferns and flakes and is the highest among all morphologies.…”

Marigold micro-flower like NiCo2O4 grown on flexible stainless-steel mesh as an electrode for supercapacitors

“…6e. The energy densities and power densities of NiCo 2 O 4 //rGO are calculated according to eqn (5) and (6) respectively (inset of Fig. 6e).…”

“…Supercapacitors have been considered as promising energy conversion and storage devices because of their environmental friendliness, fast charge-discharge rate, high power density, long cycling life, low-cost and diverse congurations. [4][5][6] Based on the charge storage mechanism, the supercapacitor can be classied into two types; (i) electric double-layer capacitor (EDLC), utilizing the electrostatic charge separation at the electrode/electrolyte interface and developing potential due to formation of the electric double layer at the interface of electrode/electrolyte, (ii) redox or pseudocapacitor store energy by either an adsorption/desorption process or reversible redox reaction occurring on the surface of active material. [7][8][9] On the other hand, transition metal oxides (TMOs) as electrode materials have been widely explored because of their high theoretical specic capacitances, abundance, high voltage window in aqueous electrolyte, environmental friendliness, and low-cost of electrode material for pseudocapacitors.…”

Electroactive Conjugated Polymer / Magnetic Functional Reduced Graphene Oxide for Highly Capacitive Pseudocapacitors: Electrosynthesis, Physioelectrochemical and DFT Investigation

“…Recently ionic liquids (ILs) have been employed increasingly in energy storage devices to improve their performances and great attractions due to the high thermal, chemical and electrochemical stability, low toxicity with good ionic conductivity, introduced them as an ideal material for SC applications. Moreover ionic liquids have been enthusiastically applied as electrolytes because of their wide potential window [16][17][18][19][20][21][22][23][24][25]. In addition, ionic liquids have also low viscosities with high conductivities advantages made them to employ in electrochemical devices for fast charge-discharge conditions.…”