High-Capacity Electric Double Layer Capacitor Using Three-Dimensional Porous Current Collector

A brain-coral-inspired metal–carbon hybrid synthesized using agarose gel for ultra-fast charge and discharge supercapacitor electrodes

“…However, no semi-circle was observed in the case of the 3DMC electrode, which indicates that electronic contact resistance is negligible. 14,15 We were also able to verify that the 3DMC electrode is not involved in Warburg impedance regarding mass transfer resistance (by the De Levie model), based on the fact that it has no line that intersects the real axis at a near À451 angle, unlike activated carbon and graphite. 5,14,15 Its equivalent circuit and details are described in Fig.…”

Preparation and Characterization of Electric Double-Layer Capacitors Having a 3D Stainless-Steel Fiber Sheet as the Current Collector

“… 27 , 28 Nickel–chromium alloy foam current collectors were also reported to improve the high-rate discharging capability of EDLCs. 30 Furthermore, porous aluminum 31 or aluminum foam 32 , 33 current collectors have been developed in recent years because aluminum has high electrical conductivity, low mass density, good stability under high voltage, and abundant resource reserves. When used in capacitors and batteries, these aluminum-based materials were found to exhibit good rate characteristics and charge–discharge cycle characteristics.…”

“…The nickel foam also provides a network for efficient electron collection and excellent channels for ion diffusion. In addition, this material is chemically stable in many liquid electrolytes and therefore is considered an excellent current collector. , Nickel–chromium alloy foam current collectors were also reported to improve the high-rate discharging capability of EDLCs . Furthermore, porous aluminum or aluminum foam , current collectors have been developed in recent years because aluminum has high electrical conductivity, low mass density, good stability under high voltage, and abundant resource reserves.…”

Calendering effect on the electrochemical performances of the thick Li-ion battery electrodes using a three dimensional Ni alloy foam current collector

“…In our study, high tolerance of NiCrAl alloy foam is considered for a positive electrode current collector. Although the NiCr alloy foam exhibited an anodic peak at around 4.7 V from the cyclic voltammetric curve between 2.0-5.0 V [26,29], there is no anodic peak for the NiCrAl alloy foam [30]. Additionally, due to the addition of Al element, it is possible to reduce the amount of Cr element.…”

“…Additionally, due to the addition of Al element, it is possible to reduce the amount of Cr element. Yao et al found that the anodized Cr layer was formed at the surface of NiCr alloy foam after ion etching and they explained that the formation of the fluoride-rich layer consisting of Cr can prevent the corrosion [29]. In the case of Al foil, it has been demonstrated that the stable passive layer can prevent the further corrosion [31][32][33].…”