Electrospun Carbon Nanofibers as Alternative Electrode Materials for Vanadium Redox Flow Batteries

Fetyan, Abdulmonem; Derr, Igor; Kayarkatte, Manoj Krishna; Langner, Joachim; Bernsmeier, Denis; Kraehnert, Ralph; Roth, Christina

doi:10.1002/celc.201500284

Cited by 70 publications

(39 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electrospinning of materials has developed into a frequently applied technique for preparing felt-like electrode materials [442], for a typical example see e.g., [443]. Obtained fibers are sometimes called electrospun carbon nanofibers ECNFs.…”

Section: Composite Materialsmentioning

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: Composite Materialsmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Holze

2018

Batteries

View full text Add to dashboard Cite

show abstract

“…In the last couple of years, researchers showed an increasing interest in electrospinning, a versatile technique which facilitates tailoring a broad range of organic polymers to fabricate thin fibers and fiber mats, amongst others for electrochemical energy applications . This efficient approach can be used to prepare high surface area electrodes of carbon nanofibers (CNFs) on a large scale, which then may be used in fuel cells, lithium ion or redox flow batteries . In our previous work, we demonstrated the use of electrospinning to prepare polyacrylonitrile (PAN)‐based CNFs and their successful application as free‐standing electrode for VRFBs.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Electrospun Carbon−Carbon Composite and Commercial Felt for Their Activity and Electrolyte Utilization in Vanadium Redox Flow Batteries

et al. 2018

Self Cite

View full text Add to dashboard Cite

A low cost highly active carbon−carbon composite fiber felt was produced by electrospinning a mixture of polyacrylonitrile and carbon black powder using poly acrylic acid as a binder for high carbon black loading. The newly designed high‐surface area electrode material showed promising results for use as electrode material for both the negative and positive half‐cell of vanadium redox flow batteries. Battery test results demonstrated promising performance for the electrospun carbon fibers at current densities below 60 mA cm−2, but were less active at higher values. The microstructure of the felt was characterized by X‐ray computed tomography to obtain the porous pathways, which facilitate electrolyte transport. The obtained results will help us to understand the role of porosity in the performance of the battery and to consequently improve the design of the carbon‐filled electrospun material.

show abstract

“…Two groups have explored and tested electrospun electrodes in a flow battery, 32,33 but they focused on the impact of carbonization and surface chemistry on the reaction kinetics of vanadium for all-vanadium cells. To date, no study has been done to optimize cell performance by modifying the material structure to enhance transport properties.…”

mentioning

confidence: 99%

Evaluation of Electrospun Fibrous Mats Targeted for Use as Flow Battery Electrodes

Liu

Kok

Kim

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

Electrospinning was used to create custom-made fibrous electrode materials for redox flow batteries with targeted structural properties. The aim was to increase the available surface area for electrochemical reaction without diminishing the transport properties of the electrode. Electrospinning conditions were identified that could produce fibers several times larger than those typically yielded by the technique, yet much smaller than in commercially available electrodes. These materials were subsequently carbonized using widely reported protocols. The resultant materials were subjected to a range of characterization tests to confirm that the feasibility of the target material, including surface area, pore and fiber sizes, porosity, conductivity, and permeability. The most promising material to emerge from this selection processes was then tested for electrochemical performance in a flow cell. The produced material performed markedly better than a commercially available material. Further optimizations such as improved consistency in the production and some surface activation treatments could provide significant advancements.

show abstract

Electrospun Carbon Nanofibers as Alternative Electrode Materials for Vanadium Redox Flow Batteries

Cited by 70 publications

References 30 publications

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Comparison of Electrospun Carbon−Carbon Composite and Commercial Felt for Their Activity and Electrolyte Utilization in Vanadium Redox Flow Batteries

Evaluation of Electrospun Fibrous Mats Targeted for Use as Flow Battery Electrodes

Contact Info

Product

Resources

About