An aqueous all-organic redox-flow battery employing a (2,2,6,6-tetramethylpiperidin-1-yl)oxyl-containing polymer as catholyte and dimethyl viologen dichloride as anolyte

Hagemann, Tino; Winsberg, Jan; Grube, Mandy; Nischang, Ivo; Janoschka, Tobias; Martin, Norbert; Hager, Martin D.; Schubert, Ulrich S.

doi:10.1016/j.jpowsour.2017.09.007

Cited by 71 publications

(68 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature‐dependent investigations of vanadium RFBs revealed that the potential peak splits of the redox‐active materials shift toward smaller peak potential gaps with increasing temperature, thus increasing the voltage efficiency. [ 45 ] Furthermore, higher temperatures increase the ion mobility in solutions, thus decreasing the ionic resistance. For example, when graphite is used as current collector, the ohmic resistance of the cell is also reduced with rising temperature.…”

Section: Resultsmentioning

confidence: 99%

Aqueous Redox Flow Battery Suitable for High Temperature Applications Based on a Tailor‐Made Ferrocene Copolymer

Borchers

Strumpf

Friebe

et al. 2020

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Aqueous Redox Flow Battery Suitable for High Temperature Applications Based on a Tailor‐Made Ferrocene Copolymer

Borchers

Strumpf

Friebe

et al. 2020

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…In other words, for a high power density battery, a membrane with high ionic conductivity is required, while for a high coulombic efficiency and capacity retention, the membrane should avoid the cross-contamination of active species [ 18 , 19 ]. Additionally, a well performing membrane should possess certain properties: (i) low ohmic resistance, (ii) good chemical stability, (iii) good mechanical stability and (iv) acceptable cost [ 5 , 20 , 21 , 22 ]. Moreover, the transport phenomena through a membrane used in RFBs are more complex and challenging as compared to those involved in other broadly studied systems such as fuel cells, as more ionic species are involved in transport activities driven by diffusion, osmosis and migration [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Anion Exchange Membrane Properties Incorporating N-spirocyclic Quaternary Ammonium Cations and Aqueous Organic Redox Flow Battery Performance

et al. 2021

Self Cite

View full text Add to dashboard Cite

Flexible cross-linked anion exchange membranes (AEMs) based on poly (p-phenylene oxide) grafted with N-spirocyclic quaternary ammonium cations were synthesized via UV-induced free-radical polymerization by using diallylpiperidinium chloride as an ionic monomer. Five membranes with ion exchange capacity (IEC) varying between 1.5 to 2.8 mmol Cl−·g−1 polymer were obtained and the correlation between IEC, water uptake, state of water in the membrane and ionic conductivity was studied. In the second part of this study, the influence of properties of four of these membranes on cell cycling stability and performance was investigated in an aqueous organic redox flow battery (AORFB) employing dimethyl viologen (MV) and N,N,N-2,2,6,6-heptamethylpiperidinyl oxy-4-ammonium chloride (TMA-TEMPO). The influence of membrane properties on cell cycling stability and performance was studied. At low-current density (20 mA·cm−2), the best capacity retention was obtained with lower IEC membranes for which the water uptake, freezable water and TMA-TEMPO and MV crossover are low. However, at a high current density (80 mA·cm−2), membrane resistance plays an important role and a membrane with moderate IEC, more precisely, moderate ion conductivity and water uptake was found to maintain the best overall cell performance. The results in this work contribute to the basic understanding of the relationship between membrane properties and cell performance, providing insights guiding the development of advanced membranes to improve the efficiency and power capability for AORFB systems.

show abstract

“…Janoschka et al. [ 118 ] developed multiple TEMPO‐based polymers (i.e., 3.2i, p(TEMPO‐ co ‐METAC), [ 107,119 ] 3.2j, p(TEMPO‐ co ‐zwitterion), [ 115 ] and 3.2k, p(TEMPO‐ co ‐PEGMA) [ 120 ] ), which were selectively blocked via pore‐size exclusion using a low‐cost dialysis membrane (molecular‐weight cut‐off (MWCO) of 60 000 g mol −1 ). 3.2j was synthesized by grafting a zwitterionic [(2‐(methacryloxy)ethyl)dimethyl‐(3‐sulfopropyl)]ammonium hydroxide as the solubilizing comonomer, [ 115 ] which exhibited a high redox potential (0.93 V SHE ), a high solubility (20 Ah L −1 in 1.5 m NaCl vs 10 Ah L −1 for 3.2i and 2.39 Ah L −1 for 3.2k), and a low dynamic viscosity (17 mPa s at 20 °C, 10 Ah L −1 vs 17 mPa s for 3.2i).…”

Section: Aqueous Organic Redox Flow Batteries (Aorfbs)mentioning

confidence: 99%

Material Design of Aqueous Redox Flow Batteries: Fundamental Challenges and Mitigation Strategies

2020

Advanced Materials

172

View full text Add to dashboard Cite

redox flow systems to date. [7] However, their high chemical cost (V 2 O 5 , $24 kg −1) and low energy density (E d < 50 Wh L −1 , normalized based on both side of the electrolytes, unless specified otherwise) limit their wide implementation for large-scale grid storage. To boost the energy density of RFBs, nonaqueous RFBs with a wider potential window were developed. However, nonaqueous RFBs face intrinsic challenges such as high cost, flammability, and low ionic conductivity of organic electrolytes. [8] Here, we review recent developments of advanced materials for electrolyte design in ARFBs. We further classified ARFBs based on the type of active material: inorganic ARFBs (i.e., AIRFBs, including vanadium-, zinc-, iron-, polysulfide-based, and two other emerging systems); and organic ARFBs (i.e., AORFBs, including viologen-, 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO)-, quinone-, and N-centered heteroaromatic-mole culebased systems). We first summarize the fundamental physicochemical properties of redox couples in each ARFB system and then discuss critical challenges and mitigation design strategies to shed light on the design guidelines for future RFBs. Finally, assessment methodologies and metrics for evaluating battery stability among different ARFBs are discussed. 2. Aqueous Inorganic Redox Flow Batteries (AIRFBs) 2.1. Vanadium-Based AIRFBs 2.1.1. Fundamental Physicochemical Properties All-vanadium redox flow batteries (VRFBs, Figure 1a) are the most developed and widely used RFB system to date. Applying a vanadium element with diverse valence states (i.e., +2, +3, +4, and +5) effectively minimizes cross contamination, facilitates electrolyte regeneration, and provides long-term durability (Figure 1b-e). For example, a 200 MW/800 MWh system has been under construction by Dalian Rongke Power since 2016. [9] The reversible cell voltage of a VRFB is 1.26 V. The nominal cell voltage of VRFBs ranges from 1.15 to 1.55 V in acidic electrolytes, since the catholyte potential is pH-dependent. [10] The redox reactions on both sides are shown in the cyclic voltammetry (CV) analysis in Figure 1f. [11] Redox flow batteries (RFBs) are critical enablers for next-generation grid-scale energy-storage systems, due to their scalability and flexibility in decoupling power and energy. Aqueous RFBs (ARFBs) using nonflammable electrolytes are intrinsically safe. However, their development has been limited by their low energy density and high cost. Developing ARFBs with higher energy density, lower cost, and longer lifespan than the current standard is of significant interest to academic and industrial research communities. Here, a critical review of the latest progress on advanced electrolyte material designs of ARFBs is presented, including a fundamental overview of their physicochemical properties, major challenges, and design strategies. Assessment methodologies and metrics for the evaluation of RFB stability are discussed. Finally, future directions for material design to realize practical applications and achieve the comme...

show abstract

An aqueous all-organic redox-flow battery employing a (2,2,6,6-tetramethylpiperidin-1-yl)oxyl-containing polymer as catholyte and dimethyl viologen dichloride as anolyte

Cited by 71 publications

References 42 publications

Aqueous Redox Flow Battery Suitable for High Temperature Applications Based on a Tailor‐Made Ferrocene Copolymer

Aqueous Redox Flow Battery Suitable for High Temperature Applications Based on a Tailor‐Made Ferrocene Copolymer

Study of Anion Exchange Membrane Properties Incorporating N-spirocyclic Quaternary Ammonium Cations and Aqueous Organic Redox Flow Battery Performance

Material Design of Aqueous Redox Flow Batteries: Fundamental Challenges and Mitigation Strategies

Contact Info

Product

Resources

About