Recent Advances toward Achieving High‐Performance Carbon‐Fiber Materials for Supercapacitors

Abstract

State-of-the-art energy storage devices are highly attractive for the ever-worsening energy depletion and environmental deterioration. Among various candidates, supercapacitors (SCs) have been considered among the most promising energy storage devices. As key factors for the development of SCs, the electrode materials have been widely exploited, and great achievements have been made. Among these materials, carbonfiber materials, such as carbon nanofibers (CNFs), carbon cloths (CCs), and carbon fiber papers (CFPs), are considered as promising candidates for electrodes and supports/current collectors for other electrode materials, owing to their special physical/chemical properties and structures. This Minireview aims to provide an overview of recent advances and technologies to improve the electrochemical performance of these carbon-fiber materials and their composite electrodes. We also briefly outline the current challenges and perspectives for the development of these carbon-fiber materials and carbon-fiberbased composite electrode materials.[a] Dr.

Carbon Nanofibers Grown on Carbon Felt as a Reinforced Current Collector for High‐Performance Lithium−Sulfur Batteries

“…In this regard, building 3D carbonaceous current collector with cross‐linked conductive network and ion channels has recently been explored as an effective way to overcome above shortcomings, including freestanding carbon nanotube/nanofibers, graphene sponges/aerogels/papers, carbon felt and carbon fiber cloth/carbon fiber paper ,. Among them, the carbon felt (CF), which consists of carbon fibers with a large diameter, is considered as a good candidate of support or current collector due to its advantages in large‐scale production, extraordinary electrical conductivity, abundant macroporous space and good stability ,. It has more hopeful prospects in the construction of high sulfur‐loading cathode.…”

MnO2/Carbon Composites for Supercapacitor: Synthesis and Electrochemical Performance

“…And reduced electrode impedance and increased specific capacitance of SWCNTs can be obtained by the high-temperature heat treatment or addition of surfactants (Byl et al, 2005). For MWCNTs, the specific surface area (∼430 m 2 g −1 ), specific capacitance (∼180 F g −1 ), power density (∼8 kW kg −1 ), and energy density (∼0.56 Wh kg −1 ) are slightly lower than those for SWCNTs (Fujiwara et al, 2001;Xie et al, 2017). In addition, carbon atoms in the CNTs are sp 2 hybridized, forming a hexagonal network with the surrounding three carbon atoms, and its s orbital composition is relatively large compared with sp 3 hybridization.…”

Comprehensive Review of the Properties and Modifications of Carbon Fiber-Reinforced Thermoplastic Composites

“…Although the treatment process increases the manufacturing time and the cost of the end product, it is essential to ensure compatibility between CF and the polymer. In addition, polymers cannot withstand high temperatures and oxidation, unlike CF which must be taken into consideration when choosing a manufacturing process [22][23][24][25]. CFRTP are favorable composite materials due to their high strength-to-weight ratio compared to other conventional materials; however, it is rather difficult to estimate the fatigue of CFRTP, unlike metals.…”

“…The treatment is conducted by creating functional groups on the surface of CF to ensure good interfacial adhesion between the polymer (matrix) and the CF (reinforcement), which is required to achieve high-performance composite materials; this is essential to their practical application. Many researchers have noticed the importance of strong bonding between the reinforcement and the matrix for high-performance composites [21][22][23][24][25].…”