All-organic non-aqueous redox flow batteries with advanced composite polymer-ceramic Li-conductive membrane

Ovsyannikov, N. A.; Romadina, Elena I.; Akhmetov, Nikita; Gvozdik, Nataliya A.; Akkuratov, Alexander V.; Pogosova, Mariam A.; Stevenson, Keith J.

doi:10.1016/j.est.2021.103810

Cited by 9 publications

(8 citation statements)

References 41 publications

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“…At the same time, one can see a decent number of pores on the membranes’ surface, especially in the cases of DMSO and NMP solvents ( Figure 6 b,c), which can be ascribed to a more severe polymer’s globularity ( Figure S10, Supplementary Materials ). Such a membrane’s morphology impedes its implementation in RFBs, because through pores can be a source of redox species crossover (i.e., membrane’s permeability) [ 16 , 34 , 35 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

“…From now on, we additionally expected the introduction of the inert matrix to protect the LATP filler from the ambient humidity and preserve its originally high IC. Then, we reported our first version of the tape-casting fabrication route of composite LATP+PVDF membranes [ 34 ] along with their general electrochemical properties and primary performance in organic flow and Li-hybrid cells [ 35 , 36 ]. We showed that the fabricated membranes demonstrated ultimate stability to metallic Li, high IC (3.4 ∙ 10 −4 S cm −1 ), good integrity, but relatively high permeability to (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)—a model redox active compound [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

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A Complex Investigation of LATP Ceramic Stability and LATP+PVDF Composite Membrane Performance: The Effect of Solvent in Tape-Casting Fabrication

et al. 2023

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Redox flow batteries (RFBs) are a prospective energy storage platform to mitigate the discrepancy between barely adjustable energy production and fluctuating demand. The energy density and affordability of RFBs can be improved significantly through the transition from aqueous systems to non-aqueous (NAq) due to their wider electrochemical stability window and better solubility of active species. However, the NAqRFBs suffer from a lack of effective membranes with high ionic conductivity (IC), selectivity (low permeability), and stability. Here, we for the first time thoroughly analyse the impact of tape-casting solvents (dimethylformamide—DMF; dimethylsulfoxide—DMSO; N-methyl-2-pyrrolidone—NMP) on the properties of the composite Li-conductive membrane (Li1.3Al0.3Ti1.7(PO4)3 filler within poly(vinylidene fluoride) binder—LATP+PVDF). We show that the prolonged exposure of LATP to the studied solvents causes slight morphological, elemental, and intrastructural changes, dropping ceramic’s IC from 3.1 to 1.6–1.9 ∙ 10−4 S cm−1. Depending on the solvent, the final composite membranes exhibit IC of 1.1–1.7 ∙ 10−4 S cm−1 (comparable with solvent-treated ceramics) along with correlating permeability coefficients of 2.7–3.1 ∙ 10−7 cm2 min−1. We expect this study to complement the understanding of how the processes underlying the membrane fabrication impact its functional features and to stimulate further in-depth research of NAqRFB membranes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Complex Investigation of LATP Ceramic Stability and LATP+PVDF Composite Membrane Performance: The Effect of Solvent in Tape-Casting Fabrication

et al. 2023

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“…59 Starting with the investigation and optimization of LATP ceramic, 28–30 we continued with setting the LATP+PVdF fabrication routine 31 and measuring the composite's IC, permeability, stability, and cyclability. 32,33 Traditionally, to enhance the membrane's IC (1.1), lithium salts ( e.g. , LiTFSI, LiClO 4 ) are added.…”

Section: Resultsmentioning

confidence: 99%

“…However, we observed sufficient crossover of the catholyte's redox-active compounds, which led to the Li-HFB capacity decay. 32,33 The membrane's permeability was identied as the main improvement point. Usually, it can be controlled by the state of composite components (ceramic ller and polymer matrix) tailored to the membrane fabrication routine.…”

Section: Introductionmentioning

confidence: 99%

Towards durable Li-hybrid flow batteries: composite membrane development, cell performance, and perspective

Akhmetov,

Waris,

Ryazantsev

et al. 2023

J. Mater. Chem. A

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“…Cyclic voltammetry-based technique was used to evaluate the permeability of the redox-active species through the membrane. [50] The experiments were performed on PalmSens4 potentiostat (PalmSens BV, Netherlands) in the argon-filled glovebox. For the permeability measurements, a special cell was assembled consisting of two compartments.…”

Section: Membrane Permeability Measurementsmentioning

confidence: 99%

Novel Ethylene Glycol Substituted Benzoxadiazole and Benzothiadiazole as Anolytes for Nonaqueous Organic Redox Flow Batteries

et al. 2022

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The design of new organic materials for redox‐flow batteries is an actively developing topic in the field of energy storage. Herein, two novel redox‐active organic molecules were presented, based on benzoxadiazole and benzothiadiazole cores bearing ethylene glycol substituents, which were first synthesized and evaluated as anolytes in nonaqueous all organic redox flow batteries. These two molecules were compared with their unsubstituted analogs in terms of electrochemistry, solubility and RFB cycling behavior. Substituted benzoxadiazole and benzothiadiazole possess low redox potentials near −2.1 V vs. Fc/Fc+, increased solubility in organic solvents, reduced permeability through the membrane and higher stability under charge‐discharge cycling in laboratory RFB cells than unsubstituted counterparts.

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All-organic non-aqueous redox flow batteries with advanced composite polymer-ceramic Li-conductive membrane

Cited by 9 publications

References 41 publications

A Complex Investigation of LATP Ceramic Stability and LATP+PVDF Composite Membrane Performance: The Effect of Solvent in Tape-Casting Fabrication

A Complex Investigation of LATP Ceramic Stability and LATP+PVDF Composite Membrane Performance: The Effect of Solvent in Tape-Casting Fabrication

Towards durable Li-hybrid flow batteries: composite membrane development, cell performance, and perspective

Novel Ethylene Glycol Substituted Benzoxadiazole and Benzothiadiazole as Anolytes for Nonaqueous Organic Redox Flow Batteries

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