Redox flow cells for energy conversion

Abstract

12Energy storage technologies provide an alternative solution to the problem of balancing power generation and power consumption. Redox flow cells are designed to convert and store electrical energy into chemical energy and release it in a controlled fashion when required. Many redox couples and cell designs have being evaluated. In this paper, redox flow systems are compared in the light of characteristics such as open circuit potential, power density, energy efficiency and charge-discharge behaviour. The key advantages and disadvantages of redox flow cells are considered while areas for further research are highlighted.

Aromatic porous-honeycomb electrodes for a sodium-organic energy storage device

“…Also, this system shows a longer cycle life of 7,000 cycles compared with 4,500 cycles for NAS batteries and the energy efficiency of the BPOE is B80% (Fig. 6b), which is comparable to 85% of NAS batteries 8 , and higher than B70% of redox-flow batteries 55 , but the self-discharge characteristic of the NAS and sodium-ion batteries based on the intercalation mechanism are better than for the BPOE electrodes ( Supplementary Fig. S8).…”

Room temperature ionic liquid electrolytes for redox flow batteries

“…RFBs are currently attracting particular attention due to their simplicity and ability to store large amounts of energy [1,2]. In RFBs, dissolved redox species are stored in tanks and pumped to an electrochemical cell during discharging and charging.…”

The use of electrolyte redox potential to monitor the Ce(IV)/Ce(III) couple

“…in combination with the Zn(II)/Zn(0) couple, is used in redox flow batteries and the performance can be monitored with an ORP probe (Ponce de Leo´n et al, 2006). The cell voltage of the Zn/Ce system during charge is approximately 2.5 V and drops below 2 V on discharge.…”