NiMoO4 nanorods with rich catalytic sites as superb electrocatalyst for cerium-based flow battery

2021 ◽  
Author(s):  
Xian Xie ◽  
Chung Yim Chan ◽  
Walid A Daoud
Keyword(s):  
Energy Efficiency ◽  
Power Density ◽  
Current Density ◽  
Cell Voltage ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Higher Power ◽  
Catalytic Sites

Higher cell voltage, current density and voltage efficiency are desired in redox flow battery (RFB) to enable the cell to achieve higher power density and energy efficiency. Cerium-vanadium flow battery...

Boosting the energy efficiency and power performance of neutral aqueous organic redox flow batteries

2017 ◽  
Vol 5 (42) ◽  
pp. 22137-22145 ◽  
Author(s):  
Bo Hu ◽  
Christopher Seefeldt ◽  
Camden DeBruler ◽  
T. Leo Liu
Keyword(s):  
Energy Efficiency ◽  
Power Density ◽  
Redox Flow Battery ◽  
Power Performance ◽  
Flow Battery ◽  
Redox Flow Batteries ◽  
Flow Batteries

A neutral aqueous organic redox flow battery demonstrated an unprecedented 79% energy efficiency at 60 mA cm−2 and 122.7 mW cm−2 power density.

High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery

2016 ◽  
Vol 13 (4) ◽  
Author(s):  
S. Kumar ◽  
S. Jayanti
Keyword(s):  
Energy Efficiency ◽  
Pressure Drop ◽  
Flow Field ◽  
Peak Power ◽  
Low Pressure ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Circulation ◽  
Vanadium Redox

In this paper, we present experimental studies of electrochemical performance of an all-vanadium redox flow battery cell employing an active area of 103 cm2, activated carbon felt, and a novel flow field, which ensures good electrolyte circulation at low pressure drops. Extended testing over 151 consecutive charge/discharge cycles has shown steady performance with an energy efficiency of 84% and capacity fade of only 0.26% per cycle. Peak power density of 193 mW cm−2 has been obtained at an electrolyte circulation rate of 114 ml min−1, which corresponds to stoichiometric factor of 4.6. The present configuration of the cell shows 20% improved in peak power and 30% reduction in pressure drop when compared to a similar cell with a different electrode and a serpentine flow field.

scholarly journals Data-Driven Electrode Parameter Identification for Vanadium Redox Flow Batteries Through Experimental and Numerical Methods

2020 ◽  
Author(s):  
Ziqiang Cheng ◽  
Kevin M. Tenny ◽  
Alberto Pizzolato ◽  
Antoni Forner-Cuenca ◽  
Vittorio Verda ◽  
...  
Keyword(s):  
Parameter Identification ◽  
Rank Correlation ◽  
Cell Voltage ◽  
Cell Polarization ◽  
Vanadium Redox Flow Battery ◽  
Data Driven ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Kinetic Rate Constant ◽  
Vanadium Redox

The vanadium redox flow battery (VRFB) is a promising energy storage technology for stationary applications (e.g., renewables integration) that offers a pathway to cost-effectiveness through independent scaling of power and energy as well as longevity. Many current research efforts are focused on improving battery performance through electrode modifications, but high-throughput, laboratory-scale testing can be time- and material-intensive. Advances in multiphysics-based numerical modeling and data-driven parameter identification afford a computational platform to expand the design space by rapidly screening a diverse array of electrode configurations. Herein, a 3D VRFB model is first developed and validated against experimental results. Subsequently, a new 2D model is composed, yielding a computationally-light simulation framework, which is used to span bounded values of the electrode thickness, porosity, volumetric area, fiber diameter, and kinetic rate constant across six cell polarization voltages. This generates a dataset of 7350 electrode property combinations for each cell voltage, which is used to evaluate the effect of these structural properties on the pressure drop and current density. These structure-performance relationships are further quantified using Kendall $\tau$ rank correlation coefficients to highlight the dependence of cell performance on bulk electrode morphology and to identify improved property sets. This statistical framework may serve as a general guideline for parameter identification for more advanced electrode designs and redox flow battery (RFB) stacks.

High energy efficiency and high power density aluminum‐air flow battery

2020 ◽  
Vol 44 (9) ◽  
pp. 7568-7579 ◽  
Author(s):  
Hejing Wen ◽  
Zhongsheng Liu ◽  
Jia Qiao ◽  
Ronghua Chen ◽  
Ruijie Zhao ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Power Density ◽  
High Power ◽  
Air Flow ◽  
High Energy ◽  
High Power Density ◽  
Flow Battery ◽  
High Energy Efficiency

Improved radical stability of viologen anolytes in aqueous organic redox flow batteries

2018 ◽  
Vol 54 (50) ◽  
pp. 6871-6874 ◽  
Author(s):  
Bo Hu ◽  
Yijie Tang ◽  
Jian Luo ◽  
Grant Grove ◽  
Yisong Guo ◽  
...  
Keyword(s):  
Power Density ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Capacity Retention ◽  
Redox Flow Batteries ◽  
Flow Batteries

A 1.38 V aqueous organic redox flow battery demonstrated 97.48% capacity retention for 500 cycles and 128 mW cm−2 power density.

A high power density and long cycle life vanadium redox flow battery

2020 ◽  
Vol 24 ◽  
pp. 529-540 ◽  
Author(s):  
H.R. Jiang ◽  
J. Sun ◽  
L. Wei ◽  
M.C. Wu ◽  
W. Shyy ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Cycle Life ◽  
Vanadium Redox Flow Battery ◽  
High Power Density ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Vanadium Redox

The Effects of Feeding Configurations to Water Flooding and General Performance of a Proton Exchange Membrane Fuel Cell

2005 ◽  
Author(s):  
A. B. Mahmud Hasan ◽  
S. M. Guo ◽  
S. V. Ekkad
Keyword(s):  
Fuel Cell ◽  
Power Density ◽  
Current Density ◽  
Proton Exchange Membrane ◽  
Cell Voltage ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Water Flooding ◽  
Cathode Side ◽  
Exchange Membrane

The performance of a Proton Exchange Membrane Fuel Cell (PEMFC) using different feeding configurations has been studied. Three bipolar plates, namely serpentine, straight channel and interdigitated designs, were arranged in different combinations for the PEMFC anode and cathode sides. Nine combinations in total were tested under different flow rates, working temperatures and loadings. The cell voltage versus current density and the cell power density versus current density curves were obtained. After operating the PEMFC under high current densities, the cell was split and the water flooding in the feeding channels was visually inspected. Experimental results showed that for different feeding configurations, interdigitated bipolar plate in anode side and serpentine bipolar plate in cathode side had the best performance in terms of cell voltage-current density curve, power density output rate, percentage of flooded area in the feeding channels, the pattern of flooding and the fuel utilization rate.

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