High-Performance Alkaline Organic Redox Flow Batteries Based on 2-Hydroxy-3-carboxy-1,4-naphthoquinone

Wang, Caixing; Yang, Zhen; Wang, Yanrong; Zhao, Peiyang; Yan, Wen; Zhu, Guoyin; Ma, Lianbo; Yu, Bo; Wang, Lei; Li, Guigen; Liu, Jie; Jin, Zhong

doi:10.1021/acsenergylett.8b01296

Cited by 123 publications

(112 citation statements)

References 42 publications

(99 reference statements)

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“…The diffusion coefficient (D) of bislawsone was determined by rotating disk electrode measurement and calculated according to the Levich plot of limiting current versus square root of rotation rate to be 4.54×10 -6 cm 2 /s (Figure 1D, 1E), which is in line with those of most small organic molecules. 2,4,6,9,25 The viscosity of bislawsone dissolved in 1M KOH was consistently below 2 cP for concentrations up to the solubility limit (Figure S4), which bodes well for minimizing energy inefficiency due to pumping loss. The crossover rates of bislawsone and lawsone through a Fumasep E-620K cation exchange membrane were measured in a two-compartment rotating cell (Figure S5).…”

Section: Resultsmentioning

confidence: 67%

Molecular Engineering of an Alkaline Naphthoquinone Flow Battery

et al. 2019

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Aqueous organic redox flow batteries (AORFBs) have recently gained significant attention as a potential candidate for grid-scale electrical energy storage. Successful implementation of this technology will require redox-active organic molecules with many desired properties. Here we introduce a naphthoquinone dimer, bislawsone, as the redox-active material in a negative potential electrolyte (negolyte) for an AORFB. This dimerization strategy substantially improves the performance of the electrolyte versus that of the lawsone monomer in terms of solubility, stability, reversible capacity, permeability, and cell voltage. An AORFB pairing bislawsone with a ferri/ferrocyanide positive electrolyte delivers an open-circuit voltage of 1.05 V and cycles at a current density of 300 mA/cm 2 with a negolyte concentration of 2 M electrons in alkaline solution. We determined the degradation mechanism for the naphthoquinone-based electrolyte using chemical analysis and predicted theoretically electrolytes based on naphthoquinones that will be even more stable.

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Section: Resultsmentioning

confidence: 67%

Molecular Engineering of an Alkaline Naphthoquinone Flow Battery

et al. 2019

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“…However, many organics with carbonyl groups (CO) and/or their reduced products (C–O–) suffer from the inherent instability and solubility in electrolyte. [ 39–43 ] It is well known that the solubility can lead to the crossover of electrode active materials between cathode and anode. As a result, expensive ion exchange membranes generally are required to prevent the crossover.…”

Section: Figurementioning

confidence: 99%

Binding Zinc Ions by Carboxyl Groups from Adjacent Molecules toward Long‐Life Aqueous Zinc–Organic Batteries

et al. 2020

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storage. [2][3][4][5][6][7] Among them, aqueous zinc batteries have aroused extensive interest and attention, which benefits from many advantages of zinc anode, including high theoretical capacity (820 mAh g −1 ), appropriate redox potential (−0.762 V vs the standard hydrogen electrode (SHE)), and intrinsic safety in aqueous system. [8][9][10][11][12][13][14][15][16][17][18][19][20] Inspired by conventional Li + storage reaction, intercalation reaction of transition metal oxides are employed to storage Zn 2+ in the mild aqueous solution. For example, Zn 0.25 V 2 O 5 ·nH 2 O, [9] Prussian blue analogue, [15] VO 2 , [17] MnO 2 , [18] Zn 3 V 2 O 7 (OH) 2 ·2H 2 O, [19] CuV 2 O 6 [20] have been used as cathodes for zinc batteries. However, the hydrated Zn 2+ and H + usually result in large volumetric change and serious structural collapse of these inorganic compounds with the insertion of a large amount of hydrated Zn 2+ , [21][22][23][24][25] showing significant capacity fading and limited cycle life. In recent years, the organic compounds containing carbonyl groups have been employed to store Li + and Na + through reversible coordination reaction (i.e., the CO/C-O-Li + /Na + conversion), and thus many batteries based on organic electrodes were proposed by using monovalent ion (Li + /Na + ) as charge carrier. [26][27][28][29][30][31] Then, it was demonstrated that such coordination reaction can also be used to store divalent ions (e.g., Mg 2+ and Zn 2+ ), which evoked the enthusiasm for developing divalent ion batteries using organic electrode. [32][33][34][35][36][37] Very recently, Chen's group reported the first Zn-organic (C 4 Q//Zn) battery with high energy and long life. [38] Chen and co-workers work indicates that it should be a good choice for building zinc batteries to use organics as the alternative to inorganic host materials to store Zn 2+ . However, many organics with carbonyl groups (CO) and/or their reduced products (C-O-) suffer from the inherent instability and solubility in electrolyte. [39][40][41][42][43] It is well known that the solubility can lead to the crossover of electrode active materials between cathode and anode. As a result, expensive ion exchange membranes generally are required to prevent the crossover. [38] Furthermore, owing to the inevitable presence of H + in mild aqueous electrolyte (e.g., aqueous ZnSO 4 electrolyte generally shows a pH value of 4-5), H + can also react with carbonyl groups of organic compounds before or in parallel with the storage of Zn 2+ , which might aggravate the poor cycle life arising from the inherent The newly emerged aqueous Zn-organic batteries are attracting extensive attention as a promising candidate for energy storage. However, most of them suffer from the unstable and/or soluble nature of organic molecules, showing limited cycle life (≤3000 cycles) that is far away from the requirement (10 000 cycles) for grid-scale energy storage. Here, a new aqueous zinc battery is proposed by using sulfur heterocyclic quinone dibenzo[b,i]thianthrene-5,7,12,1...

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“…Among all candidates, the quinoyl family has been the most widely investigated due to their structural diversity and broad tunability, permitting the engineering of solubility, redox potential, kinetics, and stability. 12,[17][18][19] As an inspiring example, Yang et al exploited the tunable redox potential of the quinoyl family to develop the rst all-quinone aqueous RFB in which active species in both catholyte and anolyte were quinones having different functionalities. 20 Recently, our group reported the rst example of a membrane-free battery, in which the same molecule, p-benzoquinone, was used as the active material in both immiscible electrolytes.…”

Section: Introductionmentioning

confidence: 99%