Amorphous Mixed‐Valence Vanadium Oxide/Exfoliated Carbon Cloth Structure Shows a Record High Cycling Stability

Song, Yu; Li, Tianyu; Yao, Bin; Kou, Tianyi; Feng, Dongyang; Liu, Xiaoxia; Li, Yat

doi:10.1002/smll.201700067

Cited by 125 publications

(74 citation statements)

References 61 publications

(89 reference statements)

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“…With the property of wide potential window arising from its multiple oxidation states (II–V), vanadium oxides (VO x ) has showed its potential for the development for electrochemical energy storage. Amorphous reduced mixed‐valence VO x on electrochemically exfoliated carbon cloth (RVO x /ECC) was synthesis by a simple cyclic voltammetry method, following by further reduced process at −1.5 V vs. SCE for 1 min . The surface functionalized oxygen groups on the ECC formed C−O‐V chemical bond.…”

Section: Carbon‐fiber‐based Composited Electrodesmentioning

confidence: 99%

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

et al. 2017

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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.

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Section: Carbon‐fiber‐based Composited Electrodesmentioning

confidence: 99%

“…This is critical for the commercial viability of producing energy storage devices . Various electrochemically active materials, such as MnO 2 , Fe 2 O 3 , Co 3 O 4 , NiO, V 2 O 5 , and TiO 2 , have been anchored on the surface of CC and CFP to enhance the electrochemical performance along with remarkable flexibility.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…Secondly,S nO 2 nanoparticles with excellent electrochemical activity were uniformly grown on the RGO, and the establishmento f SnÀOÀCb onds between SnO 2 and RGO ensuredg ood electrical contact during the charge-discharge process. [39][40][41] Thirdly, the low-crystalline structure of RGO/MoO 3 nanosheets could mitigate volume change and structural strain of MoO 3 during charge-discharge cycles. [36][37][38]…”

Section: Asymmetrics Upercapacitormentioning

confidence: 99%

“…High crystallinityi sb eneficial for improving the electricalc onductivity of MOs, but disadvantageous for structurals tability at high current densities. [36][37][38] The interface adhesion between conductive substrates andM Op articles also affects the charge-transfer efficiency in MO-based electrodes, [39][40][41] and this becomes more pronounced at high current densities. These constitute the key factorst hat affect the rate performance and cycle life, and make the development of all-MO-based ACSs highly challenging.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric All‐Metal‐Oxide Supercapacitor with Superb Cycle Performance

Yang

Sun

2018

Chemistry A European J

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Metal oxides have great potential for developing high-performance supercapacitors due to their high specific capacitances. However, achieving high energy densities while maintaining good rate capability and long cycle life has proved to be challenging. We propose herein a strategy for constructing all-metal-oxide asymmetric supercapacitors (ASCs), in which both the cathode and anode are based on metal oxides, and demonstrate their outstanding electrochemical performance. We anchored SnO nanoparticles on the surface of reduced graphene oxide (RGO) through Sn-O-C bonds (as the cathode of ACSs), and employed low-crystalline RGO/MoO nanosheets as the anode, based on the large work function difference between SnO and MoO . The resulting ASC can operate stably at 1.8 V in neutral aqueous electrolyte and deliver an energy density of up to 33 W h kg , which remains at 13.8 W h kg even at 37.5 kW kg . Moreover, the ASC exhibits a good cycling stability of 92.5 % capacitance retention after 20 000 cycles.

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“…With the growing popularity of flexible electronics in daily life, the demand for the corresponding flexible energy storage devices with high performance is also increasingly urgent . Flexible asymmetric supercapacitors (ASCs), usually consisting of a double‐layer anode and a Faradic cathode, have been considered to be promising druthers on account of their high power density, long circulation service life, wider operating voltage, and higher energy density than conventional symmetric supercapacitors . Inspired by these advantages, extensive research attention has paid to exploit a variety of robust cathode and anode materials to construct flexible ASCs.…”

Section: Introductionmentioning

confidence: 99%

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

Han

Shen

et al. 2018

Adv Funct Materials

178

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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.

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Amorphous Mixed‐Valence Vanadium Oxide/Exfoliated Carbon Cloth Structure Shows a Record High Cycling Stability

Cited by 125 publications

References 61 publications

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

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

Asymmetric All‐Metal‐Oxide Supercapacitor with Superb Cycle Performance

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

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