Molecular crowding bi-salt electrolyte for aqueous zinc hybrid batteries

Ciurduc, Diana Elena; Cruz, Carlos de la; Patil, Nagaraj; Mavrandonakis, Andreas; Marcilla, Rebeca

doi:10.1016/j.ensm.2022.09.036

Cited by 40 publications

(29 citation statements)

References 65 publications

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“…The HER tendency is evaluated by linear sweep voltammetry (LSV) in 1 M Na 2 SO 4 with three‐electrode system in which the onset overpotential for H 2 evolution on 2D Mn‐MOF@Zn anode is higher than that on 3D Mn‐MOF@Zn anode and Zn electrode and the current density of 2D Mn‐MOF@Zn anode also grows at the slowest speed, both indicating that the H 2 evolution can be more effectively suppressed (Figure S10, Supporting Information). [ 15 ] To better demonstrate the effectively suppressed side reaction on 2D Mn‐MOF@Zn anode, electron probe microanalysis (EPMA) has been conducted to detect the variation in electrode surface after cycling. [ 16 ] As illustrated in Figure S11 (Supporting Information) and Figure a, the zinc content of bare zinc decreased from 78.1% to 55.0% after 10 cycles at 1 mA cm −2 , while sulfur and oxygen element increased from 7.0% and 0.74% to 26.4% and 10.2%, respectively, which is caused by the formation of Zn 4 SO 4 (OH) 6 ·5H 2 O as a by‐product during repeat Zn stripping/plating process.…”

Section: Resultsmentioning

confidence: 99%

Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Cao

Zhang

Bai³

et al. 2023

Adv Funct Materials

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Aqueous Zn-ion energy-storage deviceswith metal Zn as anodes, including batteries and capacitors (ZIBs and ZICs), is largely hindered by dendritic growth and low coulombic efficiency since the side reactions between Zn anodes and electrolyte, originating fromthat targeted and efficient isolation of H 2 O and SO 4 2− is extremely challenging. Herein, inspired by density functional theory (DFT) that the 2D angstrom level metal-organic framework(2D-MOF) is highly selective for the passage of ions, simultaneously excluding the SO 4 2− and H2O but allowing Zn 2 + selective conduction. Moreover, 2D-MOF exhibits better mechanical strength compared with 3D-MOF, which is more conducive to inhibit dendrite growth. Impressively, benefiting from the 2D-MOFlayer, symmetric Zn cells survived up to 2000 h at 4 mA cm −2 ,near 20-times that of bare Zn anodes. Coupling it with cathode for ZICs and ZIBs, excellent electrochemical performances are presented. Importantly, symmetric Na cells with 2D-MOF as ionic sieve membrane also deliver small polarization and outstanding performance, indicating that this study provides an efficient strategy to develop long-life metal anode.

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Section: Resultsmentioning

confidence: 99%

Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Cao

Zhang

Bai³

et al. 2023

Adv Funct Materials

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“…Tremendous efforts have been performed to enhance the durability and reversibility of Zn anodes, including modifying the Zn electrode structure [10], building artificial protective layers [11][12][13][14], and introducing electrolyte additives [15][16][17]. Among them, metal-organic frameworks (MOFs) have emerged as one of the most promising materials to mitigate the Zn dendrite growth [18,19].…”

Section: Introductionmentioning

confidence: 99%

Quasi-Solid Electrolyte Interphase Boosting Charge and Mass Transfer for Dendrite-Free Zinc Battery

Zhang

et al. 2023

Nano-Micro Lett.

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The practical applications of zinc metal batteries are plagued by the dendritic propagation of its metal anodes due to the limited transfer rate of charge and mass at the electrode/electrolyte interphase. To enhance the reversibility of Zn metal, a quasi-solid interphase composed by defective metal–organic framework (MOF) nanoparticles (D-UiO-66) and two kinds of zinc salts electrolytes is fabricated on the Zn surface served as a zinc ions reservoir. Particularly, anions in the aqueous electrolytes could be spontaneously anchored onto the Lewis acidic sites in defective MOF channels. With the synergistic effect between the MOF channels and the anchored anions, Zn2+ transport is prompted significantly. Simultaneously, such quasi-solid interphase boost charge and mass transfer of Zn2+, leading to a high zinc transference number, good ionic conductivity, and high Zn2+ concentration near the anode, which mitigates Zn dendrite growth obviously. Encouragingly, unprecedented average coulombic efficiency of 99.8% is achieved in the Zn||Cu cell with the proposed quasi-solid interphase. The cycling performance of D-UiO-66@Zn||MnO2 (~ 92.9% capacity retention after 2000 cycles) and D-UiO-66@Zn||NH4V4O10 (~ 84.0% capacity retention after 800 cycles) prove the feasibility of the quasi-solid interphase.

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“…19,20 Specifically, the fluorinated SEI possesses high mechanical strength, high interfacial energy to Zn metal, low electronic conductivity, and fast ion-transfer kinetics. In addition, electrolyte optimization is of particular interest, and multiple methods such as high-concentration "water-in-salt" electrolytes, 21−23 deep-eutectic electrolytes, 24−26 molecular crowding electrolytes, 27 and functional additives 28 reactions. The exploration of functional electrolyte additives should be the most feasible and effective strategy to achieve highly reversible Zn deposition without sacrificing energy density.…”

mentioning

confidence: 99%

“…The construction of the artificial solid electrolyte interface (SEI) shows distinct advantages in relieving interfacial side reactions and suppressing dendrite growth due to sufficient passivation between the electrolyte and Zn electrode. , Specifically, the fluorinated SEI possesses high mechanical strength, high interfacial energy to Zn metal, low electronic conductivity, and fast ion-transfer kinetics. In addition, electrolyte optimization is of particular interest, and multiple methods such as high-concentration “water-in-salt” electrolytes, − deep-eutectic electrolytes, − molecular crowding electrolytes, and functional additives have been proposed to weaken the reactivity of water and restrain water-induced side reactions. The exploration of functional electrolyte additives should be the most feasible and effective strategy to achieve highly reversible Zn deposition without sacrificing energy density.…”

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confidence: 99%

Colloid Electrolyte with Weakly Solvated Structure and Optimized Electrode/Electrolyte Interface for Zinc Metal Batteries

Yang

Qian

et al. 2023

ACS Nano

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Aqueous zinc batteries are considered as a viable candidate for cost-effective and environmentally sustainable energy storage technology but are severely hampered by the notorious dendrite growth and parasitic reactions at the zinc anode side. Herein, we propose a bifunctional colloidal electrolyte design that utilizes upconversion nanocrystals, i.e., NaErF 4 @NaYF 4 , as a solid additive to provide the sustained release of functional metal and fluoride ions, which can effectively improve the reversibility of the Zn anode to inhibit dendrite growth and hydrogen evolution through forming an electrostatic shielding layer and in situ constructing a ZnF 2enriched protective interface. Experimental characterization and molecular dynamics simulation jointly confirm that the NaErF 4 @NaYF 4 additive could modify the Zn 2+ solvation environment in the vicinity of the NaErF 4 @NaYF 4 surface via the strong electrostatic coupling with Zn 2+ ions. As a consequence, the modified electrolyte enables stable zinc plating/stripping over 2100 h at a current density of 3 mA cm −2 and a capacity of 1 mAh cm −2 in symmetric cells. The assembled Zn||MnO 2 full cells with a modified electrolyte can operate stably for 1600 cycles at 2 A g −1 . This work thereby has great potential for the exploration of multifunctional electrolyte additives toward long-lasting aqueous Zn metal batteries.

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Molecular crowding bi-salt electrolyte for aqueous zinc hybrid batteries

Cited by 40 publications

References 65 publications

Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Quasi-Solid Electrolyte Interphase Boosting Charge and Mass Transfer for Dendrite-Free Zinc Battery

Colloid Electrolyte with Weakly Solvated Structure and Optimized Electrode/Electrolyte Interface for Zinc Metal Batteries

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