flow battery
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2022 ◽  
Vol 522 ◽  
pp. 230995
Mingjun Nan ◽  
Lin Qiao ◽  
Yuqin Liu ◽  
Huamin Zhang ◽  
Xiangkun Ma

2022 ◽  
Vol 521 ◽  
pp. 230912
Pham Tan Thong ◽  
Kanalli V. Ajeya ◽  
Karmegam Dhanabalan ◽  
Sung-Hee Roh ◽  
Won-Keun Son ◽  

2022 ◽  
pp. 2111744
Mingbao Huang ◽  
Shuzhi Hu ◽  
Xianzhi Yuan ◽  
Jinghua Huang ◽  
Wenjin Li ◽  

2022 ◽  
Vol 2022 ◽  
pp. 1-10
Hyung-Seok Lim ◽  
Sujong Chae ◽  
Litao Yan ◽  
Guosheng Li ◽  
Ruozhu Feng ◽  

Redox flow batteries are considered a promising technology for grid energy storage. However, capacity decay caused by crossover of active materials is a universal challenge for many flow battery systems, which are based on various chemistries. In this paper, using the vanadium redox flow battery as an example, we demonstrate a new gel polymer interface (GPI) consisting of crosslinked polyethyleneimine with a large amount of amino and carboxylic acid groups introduced between the positive electrode and the membrane. The GPI functions as a key component to prevent vanadium ions from crossing the membrane, thus supporting stable long-term cycling. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements were conducted to investigate the effect of GPI on the electrochemical properties of graphitic carbon electrodes (GCFs) and redox reaction of catholyte. X-ray photoelectron spectroscopy (XPS) and 1H nuclear magnetic resonance (NMR) spectra demonstrated that the crosslinked GPI is chemically stable for 100 cycles without dissolution of polymers and swelling in the strong acidic electrolytes. Results from inductively coupled plasma mass spectrometry (ICP-MS), Fourier-transform infrared (FTIR) spectroscopy, and energy-dispersive X-ray (EDX) spectroscopy proved that the GPI is effective in maintaining the concentration of vanadium species in their respective half-cells, resulting in improved cycling stability because of it prevents active species from crossing the membrane and stabilizes the oxidation states of active species.

2022 ◽  
Jorrit Bleeker ◽  
Stijn Reichert ◽  
Joost Veerman ◽  
David Vermaas

Abstract Here we assess the route to convert low grade waste heat (<100°C) into electricity by leveraging the temperature dependency of redox potentials (Seebeck effect). We use fluid-based redox-active species, which can be easily heated and cooled using heat exchangers. By using a first principles approach, we designed a redox flow battery system with Fe(CN)63−/Fe(CN)64− and I−/I3− chemistry. We evaluate the continuous operation with one flow cell at high temperature and one at low temperature. We show that the most sensitive parameter, the Seebeck coefficient, can be controlled via the redox chemistry, the reaction quotient and solvent additives, and we present the highest Seebeck coefficient for this RFB chemistry. A power density of 0.6 W/m2 and stable operation for 2 hours are achieved experimentally. We predict high (close to Carnot) heat-to-power efficiencies if challenges in the heat recuperation and Ohmic resistance are overcome, and the Seebeck coefficient is further increased.

2022 ◽  
pp. 120254
Bengui Zhang ◽  
Yanshi Fu ◽  
Qian Liu ◽  
Xueting Zhang ◽  
Zhirong Yang ◽  

2022 ◽  
Vol 101 ◽  
pp. 96-110
Désirée Ruiz-Martín ◽  
Daniel Moreno-Boza ◽  
Rebeca Marcilla ◽  
Marcos Vera ◽  
Mario Sánchez-Sanz

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