Plasma Surface Treatment of Carbonaceous Materials for Application in Electric Double Layer Capacitors

Abstract

In this work, carbonaceous materials were modified in order to improve capacitance and charge density in electric double layer capacitors (EDLCs). Optimal conditions for plasma surface treatment of activated carbon have been examined for times from 1 to 10 h at 150 °C. The plasma is a high-frequency glow discharge in N2. The pressure of the gas is 13.3 Pa. The electrode is set up so that the EDLC sample is covered with the glow discharge. Specific capacitance and charge density can be improved by plasma surface treatment of carbon materials.

Low-Pressure Argon/Hydrogen/Oxygen Plasma Treatment on LiMn2O4 Li-Ion Hybrid Supercapacitors

“…With all three types of LPP treatments, the proportions of EDLC increase. 63 The increase in EDLC proportion is the smallest for the Ar+5%O 2 lPP treatment. Because PC is mainly related to the GCD of Li-HSCs.-Figure 9 shows the GCD measurement results under the constant currents of 1 mA, 0.5 mA and 0.25 mA.…”

Tailored wettability in fluorinated carbon nanoparticles synthesized from fluorotelomer alcohols

“…Meanwhile, indirect fluorination involves thermal decomposition of a fluorine source such as xenon fluoride (XeF2) or terbium fluoride (TbF4) in close proximity to the target carbon material [19][20][21]. Alternatively, functionalization of carbon materials can be achieved via plasma treatment at room temperature in carbon tetrafluoride gas (CF4) [14,[22][23][24][25][26].…”

Loading effect of a barium titanate artificial interface on high voltage capabilities at high charge and discharge rates

“…Lithium ion batteries (LIBs) are a technology of choice in this respect. Nevertheless, they are limited in that their current power densities are relatively low, making them inferior to technologies such as electric doublelayer capacitors (EDLCs) [1][2][3][4] and lithium ion capacitors (LICs). [5][6][7] In other words, the development of LIBs with drastically improved high-rate capabilities would guarantee their position as the on-board power source of choice for the next-generation vehicles.…”