Preparation of activated carbon paper by modified Hummer’s method and application as vanadium redox battery

Xie, Yonghong; Cheng, Zhiyu; Guo, Bing; Qiu, Yongfu; Fan, Hongsong; Sun, Shoufang; Wu, Tao; Liu, Jin; Liu, Fan

doi:10.1007/s11581-014-1307-9

Cited by 11 publications

(5 citation statements)

References 13 publications

(15 reference statements)

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“…These indicte that the V 3+ /V 2+ redox reaction is controlled by diffusion process, and should be a quasi-reversible one. [60][61][62] By the Randles-Sevcik equation for the quasi-reversible process, the line slope is in proportion to the diffusion properties of active species. 60,61 Figure 9c shows that sulfonation treatment for CNTs has a positive effect on mass transfer for vanadium ions on them.…”

Section: Resultsmentioning

confidence: 99%

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Cheng

Jiang

et al. 2018

J. Electrochem. Soc.

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Sulfonated carbon nanotubes (CNTs) was prepared by direct hydrothermal treatment in chlorosulfonic acid and employed as electrocatalysts for V 3+ /V 2+ redox reaction for vanadium redox flow battery. The sulfonic groups introduced on the surface of CNTs not only significantly promote the accessibility of vanadium electrolyte, but also provide more active sites for V 3+ /V 2+ redox reaction. Therefore, a series of sulfonated CNTs exhibit higher electrochemical activity and reversibility toward V 3+ /V 2+ redox reaction compared with pristine CNTs. In particular, sulfonated CNTs treated for 10 hrs (CNTs-10) demonstrate the best electrocatalytic performance. The cell using CNTs-10 as negative catalysts achieves excellent charge-discharge performance with voltage efficiency and energy efficiency of 68.34% and 65.56% at a current density of 120 mA cm −2 , respectively, which are higher than those (60.74% and 60.50%) for the pristine cell. The excellent electrocatalytic performance of sulfonated CNTs toward V 3+ /V 2+ redox reaction is ascribed to the promoted electrochemical kinetic process of V 3+ /V 2+ redox reaction and the accelerated mass transfer of vanadium ions.

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Section: Resultsmentioning

confidence: 99%

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Cheng

Jiang

et al. 2018

J. Electrochem. Soc.

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“…An energy efficiency around 70% at j = 150 mA·cm −2 was stable for at least 200 cycles. Carbon paper has been activated by a modified Hummer's method [223] and increased surface area and improved wettability were noticed. Improved performance as the positive VRFB electrode was also attributed to created functional groups.…”

Section: Structural Modification Of Carbonmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

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Flow batteries (also: redox batteries or redox flow batteries RFB) are briefly introduced as systems for conversion and storage of electrical energy into chemical energy and back. Their place in the wide range of systems and processes for energy conversion and storage is outlined. Acceleration of electrochemical charge transfer for vanadium-based redox systems desired for improved performance efficiency of these systems is reviewed in detail; relevant data pertaining to other redox systems are added when possibly meriting attention. An attempt is made to separate effects simply caused by enlarged electrochemically active surface area and true (specific) electrocatalytic activity. Because this requires proper definition of the experimental setup and careful examination of experimental results, electrochemical methods employed in the reviewed studies are described first.

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“…GO that originated from graphite powder was prepared by the modified Hummer's method. 32 Subsequently, characterization of GO displayed a 2D sheet-like structure (Figure 1a), implying that GO was successfully fabricated. In addition, Figure 1b showed that GdDN had excellent dispersion, and the corresponding size was about 50 nm.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…GO that originated from graphite powder was prepared by the modified Hummer’s method . Subsequently, characterization of GO displayed a 2D sheet-like structure (Figure a), implying that GO was successfully fabricated.…”

Section: Results and Discussionmentioning

confidence: 99%

Composite of Gadolinium-Labeled Dendrimer Nanocluster And Graphene Oxide Nanosheet for Highly Efficient Liver T₁-Weighted Imaging Probe

Tang

Bian

et al. 2019

ACS Biomater. Sci. Eng.

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Magnetic resonance contrast agent employs the use of gadolinium chelates, which has many limitations for clinical use including a low contrast effect, a short diagnostic window, and a brief blood circulation time. On this basis, we designed a gadolinium-labeled dendrimer nanocluster (GdDN) loaded graphene oxide nanosheet (GO-GdDN) to boost T 1 contrast ability for imaging in vivo and improve blood circulation time. GO-GdDN presented an ultrahigh r 1 relaxivity up to 19.07 mM–1 s–1 in a 9.4 T MR scanner, and a bright contrast image in vitro experiment. In addition, GO-GdDN could be internalized by HepG2 cells and presented strong cell contrast enhancement and reduction of the T 1 value in HepG2 cells. In vivo, the retention time of GO-GdDN was significantly improved, so that the accumulation of GO-GdDN in liver was enhanced. Moreover, compared to Gd-DTPA, systemic delivery of GO-GdDN dramatically enhanced the signal-to-noise ratio of liver images, which was helpful for accurate imaging of liver and detection of liver lesions in vivo. Thus, this study demonstrates the utility of a powerful diagnosis tool for liver tumor or lesions.

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Preparation of activated carbon paper by modified Hummer’s method and application as vanadium redox battery

Cited by 11 publications

References 13 publications

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Composite of Gadolinium-Labeled Dendrimer Nanocluster And Graphene Oxide Nanosheet for Highly Efficient Liver T₁-Weighted Imaging Probe

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Preparation of activated carbon paper by modified Hummer’s method and application as vanadium redox battery

Cited by 11 publications

References 13 publications

Sulfonated Carbon Nanotubes as Superior Catalysts towards V3+/V2+Redox Reaction for Vanadium Redox Flow Battery

Sulfonated Carbon Nanotubes as Superior Catalysts towards V3+/V2+Redox Reaction for Vanadium Redox Flow Battery

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Composite of Gadolinium-Labeled Dendrimer Nanocluster And Graphene Oxide Nanosheet for Highly Efficient Liver T1-Weighted Imaging Probe

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Product

Resources

About

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Sulfonated Carbon Nanotubes as Superior Catalysts towards V³⁺/V²⁺Redox Reaction for Vanadium Redox Flow Battery

Composite of Gadolinium-Labeled Dendrimer Nanocluster And Graphene Oxide Nanosheet for Highly Efficient Liver T₁-Weighted Imaging Probe