Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Kim, Dae Sik; Chung, Dong Jae; Park, Hyeong Il; Ansari, Mohd Zahid; Song, Taeseup; Kim, Hansu

doi:10.1002/bkcs.11380

Cited by 7 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kim et al heat-treated graphite felt in a stream of NH 3 to achieve direct nitridation [358]. Wettability was not affected, but improved energy efficiency after an optimum treatment temperature of 850 • C was found for the initial 50 cycles.…”

Section: Mechanical Thermal or Chemical Surface Treatmentmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

View full text Add to dashboard Cite

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.

show abstract

Section: Mechanical Thermal or Chemical Surface Treatmentmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

View full text Add to dashboard Cite

show abstract

“…Inspired by these notions, Shao et al [ 76 ] applied nitrogen doping for VRFB electrode modification to promote the electrochemical properties of the VO 2+ /VO 2 + redox couple for VRFBs. Since then, besides nitrogen [ 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ], doping with other heteroatoms, such as phosphorus [ 87 ], halogen, and boron [ 88 , 89 , 90 , 91 ], as well as dual doping with carbon–nitrogen [ 92 , 93 , 94 , 95 ], phosphorus-doped C 3 N 4 [ 96 ], oxygen–nitrogen [ 97 , 98 , 99 , 100 , 101 ], oxygen–phosphorus [ 102 , 103 ], fluorine–phosphorus [ 104 ], nitrogen–phosphorus [ 105 ], and nitrogen–sulfur [ 106 ], have been applied in VRFBs and demonstrated excellent rate performance and outstanding cycling stability.…”

Section: Literature Review Of Modification Of Carbonous Feltmentioning

confidence: 99%

Insights into the Modification of Carbonous Felt as an Electrode for Vanadium Redox Flow Batteries

et al. 2023

View full text Add to dashboard Cite

The vanadium redox flow battery (VRFB) has been regarded as one of the best potential stationary electrochemical storage systems for its design flexibility, long cycle life, high efficiency, and high safety; it is usually utilized to resolve the fluctuations and intermittent nature of renewable energy sources. As one of the critical components of VRFBs to provide the reaction sites for redox couples, an ideal electrode should possess excellent chemical and electrochemical stability, conductivity, and a low price, as well as good reaction kinetics, hydrophilicity, and electrochemical activity, in order to satisfy the requirements for high-performance VRFBs. However, the most commonly used electrode material, a carbonous felt electrode, such as graphite felt (GF) or carbon felt (CF), suffers from relatively inferior kinetic reversibility and poor catalytic activity toward the V2+/V3+ and VO2+/VO2+ redox couples, limiting the operation of VRFBs at low current density. Therefore, modified carbon substrates have been extensively investigated to improve vanadium redox reactions. Here, we give a brief review of recent progress in the modification methods of carbonous felt electrodes, such as surface treatment, the deposition of low-cost metal oxides, the doping of nonmetal elements, and complexation with nanostructured carbon materials. Thus, we give new insights into the relationships between the structure and the electrochemical performance, and provide some perspectives for the future development of VRFBs. Through a comprehensive analysis, it is found that the increase in the surface area and active sites are two decisive factors that enhance the performance of carbonous felt electrodes. Based on the varied structural and electrochemical characterizations, the relationship between the surface nature and electrochemical activity, as well as the mechanism of the modified carbon felt electrodes, is also discussed.

show abstract

“…[18,19] J. Jin et al found that introducing nitrogen-containing functional group (nitrogen-doped) was an effective method to improve the electrochemical activity of carbon-based materials. [20][21][22] Their research also stated that among four types of nitrogen-doped species including pyridinic-N, pyrrolic-N, graphitic N, and oxidic-N, graphitic N was a catalytic active center for the VO 2 + /VO 2 + couple. In this work, we propose a simple ammonium sulfate hydrothermal method to prepare the nitrogen-doped carbon felts to improve electrochemical activity and hydrophilicity (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…J. Jin et al. found that introducing nitrogen‐containing functional group (nitrogen‐doped) was an effective method to improve the electrochemical activity of carbon‐based materials [20–22] . Their research also stated that among four types of nitrogen‐doped species including pyridinic‐N, pyrrolic‐N, graphitic N, and oxidic‐N, graphitic N was a catalytic active center for the VO 2+ /VO 2 + couple.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐Doped Carbon Felt as an Electrode Material for Vanadium Flow Batteries

et al. 2022

View full text Add to dashboard Cite

Vanadium flow batteries (VFBs) are well suited for energy storage due to the attractive features of high safety and long cycle life. Electrodes are a key component of a VFB, directly affecting the energy efficiency and power density of the battery. However, the carbon felt electrode commonly used suffers from poor hydrophilicity and electrochemical activity. Herein, a simple ammonium sulfate hydrothermal method was presented to improve the electrochemical activity and hydrophilicity of carbon felt. In the design, hydrophilic nitrogen‐containing and oxygen‐containing functional groups were introduced in the hydrothermal process, in favor of optimizing the hydrophilicity of carbon felt. The doping of nitrogen with negative charge density and the increasing defects promoted the electrochemical reactions of vanadium ions. Furthermore, the effects of the experimental parameters on the performance of the carbon felt and the battery were carefully studied. As a result, the VFB with 90‐1 nitrogen‐doped carbon felt exhibited the best performance; the energy efficiency achieved 87.34 % at the current density of 80 mA/cm2, which was 3.91 % higher than that with the original one.

show abstract

Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Cited by 7 publications

References 47 publications

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Insights into the Modification of Carbonous Felt as an Electrode for Vanadium Redox Flow Batteries

Nitrogen‐Doped Carbon Felt as an Electrode Material for Vanadium Flow Batteries

Contact Info

Product

Resources

About