Enhancing the Capacitive Storage Performance of Carbon Fiber Textile by Surface and Structural Modulation for Advanced Flexible Asymmetric Supercapacitors

Abstract

The exploration of high-energy anodes with good mechanical properties is highly attractive for flexible asymmetric supercapacitors (ASCs) but challenging. Owing to the excellent conductivity and superior mechanical flexibility, carbon fiber textile (CFT) holds great promise as a substrate/ current-collector for fabricating flexible electrodes. Yet, it is rarely used as a flexible active electrode in terms of its low electrochemical reactivity and small accessible area. In this work, an effective surface and structural modulation strategy is developed to directly tune CFT into a highly active anode for flexible ASCs by creating hierarchical pores and numerous pseudocapacitive oxygenic groups. Arising from large surface and increased active sites, the as-prepared activated porous CFT (APCFT) electrode not only achieves a large capacitance (1.2 F cm −2 at 4 mA cm −2 ) and fast kinetics but also shows satisfying cycling durability (no capacitance decay after 25 000 cycles). More importantly, an advanced flexible ASC device with an impressive energy density of 4.70 mWh cm −3 is successfully assembled by employing this APCFT as an anode, outperforming most recently reported ASC devices. This dual modification strategy may throw light on the rational design of new generation advanced carbon electrodes for high-performance flexible supercapacitors.

Dual-functional NiCo2S4 polyhedral architecture with superior electrochemical performance for supercapacitors and lithium-ion batteries

“…Recently, more and more attentions have been attracted by the implantation of MOFs in energy storage areas including supercapacitors and lithium-ion batteries [19]. As a result, MOFs materials combining pseudocapacitive redox centers can be exploited as one fresh kind of electrode materials for supercapacitors in the future [20][21][22].…”

One-Pot Synthesis and Characterization of VO2(B) with a Large Voltage Window Electrochemical Performance in Aqueous Solution

“…Moreover, supercapacitors (SCs) are considered as one of the most attractive pieces of new-generation apparatus in energy storage, and their performance is closely related to the characteristics of electrode materials. Metal oxides with novel structures show excellent specific capacitance and energy density because of their energy storage mechanism [8][9][10]. Meanwhile, there is a wide utilization in various fields, such as energy, biology, gas sensors, etc.…”

An integrated electrode based on nanoflakes of MoS2 on carbon cloth for enhanced lithium storage

“…In recent years, the rapid advances in the eld of exible and portable devices (such as exible smartphones, rollup displays and wearable electronics) have triggered the requirements for exible energy storage systems with excellent mechanical and electrical properties. [1][2][3][4][5] For instance, with the development of implantable/wearable healthcare devices, new self-sustainable energy storage devices have been developed. 6 Amongst the available commercial power sources, exible lithium-ion batteries (LIBs) have attracted a special attention.…”

“…A carbon cloth (CC), with its high electron conductivity, exibility and superior mechanical property, is regarded to be one of the ideal substrates for the fabrication of exible electrodes. 2,9,21 Thus, the integration of MoS 2 with conductive CC will guarantee the combination of fast electron transport and superior mechanical stability. [22][23][24] The prerequisites for the design and preparation of an integrated electrode has been studied in the present investigation.…”