Graphite felt modified with WO 3 , SnO 2 , and binary WO 3 / SnO 2 ‐mixtures as novel positive electrodes for cerium‐based redox flow batteries

2021 ◽  
Author(s):  
Omar K. Bingah ◽  
Mark D. Pritzker
Keyword(s):  
Positive Electrodes ◽  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Flow Batteries

Fabrication of nitrogen-doped graphite felts as positive electrodes using polypyrrole as a coating agent in vanadium redox flow batteries

2015 ◽  
Vol 3 (23) ◽  
pp. 12276-12283 ◽  
Author(s):  
Sangki Park ◽  
Hansung Kim
Keyword(s):  
Positive Electrodes ◽  
Coating Agent ◽  
Graphite Felt ◽  
Nitrogen Doped ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Novel Method ◽  
Vanadium Redox

A novel method for preparing nitrogen-doped graphite felts as positive electrodes in vanadium redox flow batteries was developed and studied. These materials were synthesized by directly coating a thin polypyrrole layer on the graphite felt surface followed by subsequent carbonization in the presence of Co (NGF-Co).

Highly efficient and ultra-stable boron-doped graphite felt electrodes for vanadium redox flow batteries

2018 ◽  
Vol 6 (27) ◽  
pp. 13244-13253 ◽  
Author(s):  
H. R. Jiang ◽  
W. Shyy ◽  
L. Zeng ◽  
R. H. Zhang ◽  
T. S. Zhao
Keyword(s):  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Highly Efficient ◽  
Boron Doped ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Felt Electrodes

Highly efficient and ultra-stable boron-doped graphite felt electrodes are designed, fabricated and tested for vanadium redox flow batteries.

Nitrogen-Doped Carbon Spheres-Decorated Graphite Felt as a High-Performance Electrode for Fe Based Redox Flow Batteries

2021 ◽  
Author(s):  
Anarghya Dinesh ◽  
Anantha Mylarapattana Shankaranarayana ◽  
Santosh Mysore Srid ◽  
Narendra Kumar Muniswamy ◽  
Krishna Venkatesh ◽  
...  
Keyword(s):  
High Performance ◽  
Coulombic Efficiency ◽  
Electrochemical Techniques ◽  
Single Step ◽  
Carbon Spheres ◽  
Active Nitrogen ◽  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Carbon Catalysts

Abstract In this paper, the performance of Fe based redox flow batteries (IRFBs) was dramatically improved by coating N-doped carbon spheres (NDCS) on the graphite felt electrodes. NDCS was synthesized by the single-step hydrothermal method using dextrose and ammonia as a precursor and coated over a graphite felt electrode by electrostatic spraying. The weight of NDCS required for the modification of the electrode to achieve the effective performance of the battery was studied using electrochemical techniques. Cyclic voltammetry (CV) and potentiodynamic polarization study was used to evaluate the kinetic reversibility and linear polarization resistance offered by the electrode towards electrolyte. The characterizing features of the NDCS, untreated graphite felt (UGF) electrode, and optimized modified graphite felt (MGF) electrode were analyzed using SEM, EDAX, XRD, and Raman spectroscopy. The charge-discharge studies were performed for the 132 cm2 IRFB using a 2 mg/cm2 MGF electrode as a positive electrode by varying the current densities from 20 to 60 mA/cm2. The cell resulted in an average coulombic efficiency (CE) of 93%, voltaic efficiency (VE) of 72%, and energy efficiency (EE) of 68% for 15 cycles at the current density of 30 mA/cm2. The improvement in the performance of the IRFB is due to the presence of electrochemically active nitrogen-bearing carbon catalysts. In this paper, the pioneering effort has been made to improve the efficiency of the IRFB with an active area of 132 cm2 using glycine as the ligand.

scholarly journals 3D flower-like molybdenum disulfide modified graphite felt as a positive material for vanadium redox flow batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (29) ◽  
pp. 17235-17246
Author(s):  
Lei Wang ◽  
Shuangyu Li ◽  
Dan Li ◽  
Qinhao Xiao ◽  
Wenheng Jing
Keyword(s):  
Ion Transport ◽  
Molybdenum Disulfide ◽  
Open Flower ◽  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Positive Material ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Vanadium Ion

The open flower-like structure facilitates vanadium ion transport. The capacity and efficiency of a battery using MoS2/GF are dramatically increased.

Highly Energy-Efficient Vanadium Redox Flow Batteries with Thermo-Chemically Activated Graphite Felt Electrodes

2020 ◽  
Vol MA2020-02 (2) ◽  
pp. 208-208
Author(s):  
Vladimir Neburchilov ◽  
Ken Tsay ◽  
Khalid Fatih ◽  
Roberto Neagu ◽  
Oltion Kodra ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Felt Electrodes
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