Low‐Cost Multi‐Function Electrolyte Additive Enabling Highly Stable Interfacial Chemical Environment for Highly Reversible Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: Sept. 1, 2023

Abstract The practicality of aqueous zinc ion batteries (AZIBs) for large‐scale energy storage is hindered by challenges associated with anodes. In this study, a low‐cost and multi‐function electrolyte additive, cetyltrimethyl ammonium bromide (CTAB), presented to address these issues. CTAB adsorbs onto the anode surface, regulating Zn 2+ deposition orientation inhibiting dendrite formation. It also modifies solvation structure reduce water reactivity minimize side reactions. Additionally, optimizes key physicochemical parameters electrolyte, enhancing stability electrode/electrolyte interface promoting reversibility in AZIBs. Theoretical simulations combined operando synchrotron radiation‐based situ Fourier transform infrared spectra electrochemical impedance further confirm modified coordination environment adsorption effect cations at anode/electrolyte interface. As result, assembled Zn‐MnO 2 battery demonstrates remarkable specific capacity 126.56 mAh g −1 high current density 4 A after 1000 cycles. This work highlights potential as promising solution improving performance AZIBs applications.

Language: Английский

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A weakly solvating electrolyte towards practical rechargeable aqueous zinc-ion batteries

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 5, 2024

Abstract Structure deterioration and side reaction, which originated from the solvated H 2 O, are main constraints for practical deployment of both cathode anode in aqueous Zn-ion batteries. Here we formulate a weakly solvating electrolyte to reduce power O strengthen coordination competitiveness SO 4 2− Zn 2+ over O. Experiment results theoretical simulations demonstrate that water-poor solvation structure is achieved, can (i) substantially eliminate solvated-H O-mediated undesirable reactions on anode. (ii) boost desolvation kinetics suppress dendrite growth as well aberration cathode. Remarkably, synergy these two factors enables long-life full cells including Zn/NaV 3 8 ·1.5H Zn/MnO Zn/CoFe(CN) 6 cells. More importantly, rechargeable AA-type Zn/NVO assembled, present capacity 101.7 mAh stability 96.1% retention after 30 cycles at 0.66 C.

Language: Английский

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Improved Interfacial Ion Migration and Deposition through the Chain‐Liquid Synergistic Effect by a Carboxylated Hydrogel Electrolyte for Stable Zinc Metal Anodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(42)

Published: Aug. 30, 2023

The large-scale applicability of Zn-metal anodes is severely impeded by the issues such as dendrite growth, complicated hydrogen evolution, and uncontrollable passivation reaction. Herein, a negatively charged carboxylated double-network hydrogel electrolyte (Gelatin/Sodium alginate-acetate, denoted Gel/SA-acetate) has been developed to stabilize interfacial electrochemistry, which restructures type Zn2+ ion solvent sheath optimized via chain-liquid synergistic effect. New bonds are reconstructed with water molecules zincophilic functional groups, directional migration hydrated ions therefore induced. Concomitantly, robust chemical bonding layers Zn slab exhibits desirable anti-catalytic effect, thereby greatly diminishing activity eliminating side reactions. Subsequently, symmetric cell using Gel/SA-acetate demonstrates reversible plating/stripping performance for 1580 h, an asymmetric reaches state-of-the-art runtime 5600 h high average Coulombic efficiency 99.9 %. resultant zinc hybrid capacitors deliver exceptional properties including capacity retention 98.5 % over 15000 cycles, energy density 236.8 Wh kg-1 , mechanical adaptability. This work expected pave new avenue development novel electrolytes towards safe stable anodes.

Language: Английский

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All-round supramolecular zwitterionic hydrogel electrolytes enabling environmentally adaptive dendrite-free aqueous zinc ion capacitors

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(3), P. 1291 - 1311

Published: Jan. 1, 2023

An all-round supramolecular zwitterionic hydrogel electrolyte with the advantages of in situ repair, H 2 O-poor interface, and boosting desolvation hydrated Zn 2+ is proposed to enable fabrication environment-adaptive dendrite-free zinc ion capacitors.

Language: Английский

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Dynamically Interfacial pH‐Buffering Effect Enabled by N ‐Methylimidazole Molecules as Spontaneous Proton Pumps toward Highly Reversible Zinc‐Metal Anodes

Advanced Materials, Journal Year: 2023, Volume and Issue: unknown, P. 2208630 - 2208630

Published: Feb. 5, 2023

Aqueous zinc-metal batteries have attracted extensive attention due to their outstanding merits of high safety and low cost. However, the intrinsic thermodynamic instability zinc in aqueous electrolyte inevitably results hydrogen evolution, consequent generation OH- at interface will dramatically exacerbate formation dead dendrites. Herein, a dynamically interfacial pH-buffering strategy implemented by N-methylimidazole (NMI) additive is proposed remove detrimental zinc/electrolyte real-time, thus eliminating accumulation by-products fundamentally. Electrochemical quartz crystal microbalance molecular dynamics simulation reveal existence an absorption layer assembled NMI protonated (NMIH+ ), which acts as ion pump for replenishing with protons constantly. Moreover, situ pH detection method micro-sized spatial resolution based on ultra-microelectrode technology developed probe evolution diffusion layer, confirming stabilized chemical environment NMI-containing electrolyte. Accordingly, NMI, excellent cumulative plating capacity 4.2 Ah cm-2 ultrahigh Coulombic efficiency 99.74% are realized electrodes. Meanwhile, NMI/NMIH+ buffer can accelerate dissolution/deposition process MnO2 /Mn2+ cathode, leading enhanced cycling capacity.

Language: Английский

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Decoupling, quantifying, and restoring aging-induced Zn-anode losses in rechargeable aqueous zinc batteries

Joule, Journal Year: 2023, Volume and Issue: 7(2), P. 366 - 379

Published: Feb. 1, 2023

Language: Английский

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Carboxymethyl Chitosan‐Modified Zinc Anode for High‐Performance Zinc–Iodine Battery with Narrow Operating Voltage

Small Structures, Journal Year: 2023, Volume and Issue: 4(9)

Published: May 1, 2023

Reasonable regulation of iodine redox has gradually shown potential as a desirable cathodic reaction in zinc‐based batteries, but suffers from poor cyclic reversibility caused by uncontrollable side reactions. Also, the irregular growth dendrites and unavoidable occurrences hydrogen evolution H 2 O‐rich environment have become permanent topics anodic zinc. Herein, cross‐linked gel based on carboxymethyl chitosan is proposed serves an artificial electrolyte interphase for zinc anode (marked Zn‐CMCS). Such coating formed crosslinking among monodentate carboxyl group, hydroxyl, amino, Zn 2+ adding solution closely adheres surface foil with toughness, ductility, ideal electrochemical kinetics. Additionally, its homogenized charge distribution provides “flexible” substrate plating/stripping, resulting flat real‐time interface. While introducing I − /I 0 conversion matching adsorptive activated carbon fiber cloth (AC‐CFC) cathode, internal space restricted CMCS enables assembled Zn‐CMCS/AC‐CFC battery to exhibit greatly improved under long‐cycling condition within 28 000 cycles (measured more than years) narrow operating voltage range 0.23 V.

Language: Английский

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Low‐cost and Non‐flammable Eutectic Electrolytes for Advanced Zn‐I₂ Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 7, 2023

As a burgeoning electrolyte system, eutectic electrolytes based on ZnCl2 /Zn(CF3 SO3 )2 /Zn(TFSI)2 have been widely proposed in advanced Zn-I2 batteries; however, safety and cost concerns significantly limit their applications. Here, we report new-type ZnSO4 -based that are both safe cost-effective. Their universality is evident various solvents of polyhydric alcohols, which multiple -OH groups not only involve Zn2+ solvation but also interact with water, resulting the high stability electrolytes. Taking propylene glycol-based hydrated as an example, it features significant advantages non-flammability low price <1/200 Zn(CF3 Moreover, its effectiveness confining shuttle effects I2 cathode side reactions Zn anodes evidenced, cells reversibility at 1 C 91.4 % capacity remaining under 20 C. After scaling up to pouch cell record mass loading 33.3 mg cm-2 , super-high-capacity retention 96.7 achieved after 500 cycles, exceeds other aqueous counterparts. This work broadens family for battery design.

Language: Английский

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Recent advances in manipulating strategy of aqueous electrolytes for Zn anode stabilization

Energy storage materials, Journal Year: 2023, Volume and Issue: 56, P. 227 - 257

Published: Jan. 16, 2023

Language: Английский

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Achieving Highly Proton‐Resistant Zn–Pb Anode through Low Hydrogen Affinity and Strong Bonding for Long‐Life Electrolytic Zn//MnO₂Battery

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(31)

Published: May 20, 2023

High-energy electrolytic Zn//MnO2 batteries show potential for grid-scale energy storage, but the severe hydrogen evolution corrosion (HEC) caused by acidic electrolytes results in subdued durability. Here, an all-around protection strategy is reported achieving stable Zn metal anodes. First, a proton-resistant Pb-containing (Pb and Pb(OH)2 ) interface constructed on anode (denoted as Zn@Pb), which situ forms PbSO4 during H2 SO4 protects substrate from HEC. Second, to improve plating/stripping reversibility of Zn@Pb, Pb(CH3 COO)2 additive Zn@Pb-Ad) introduced, triggers precipitation releases trace Pb2+ that can dynamically deposit Pb layer plating suppress The superior HEC resistance stems low affinity H+ , well strong bonding between Pb-Zn or Pb-Pb, increase reaction overpotential barrier. Consequently, Zn@Pb-Ad//MnO2 battery runs stably 630 795 h 0.2 0.1 m electrolytes, respectively, are >40 times better than bare Zn. as-prepared A h-level achieves one-month calendar life, opening door next generation high-durable batteries.

Language: Английский

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