Engineering a self-adaptive electric double layer on both electrodes for high-performance zinc metal batteries

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(11), P. 4748 - 4760

Published: Jan. 1, 2022

A zwitterionic ionic liquid additive enables a high-performance aqueous Zn metal battery via constructing self-adaptive electric double layer for both electrodes.

Language: Английский

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A Dual‐Functional Organic Electrolyte Additive with Regulating Suitable Overpotential for Building Highly Reversible Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(5)

Published: April 25, 2023

Abstract Aqueous zinc ion batteries (AZIBs) with high safety, low cost, and eco‐friendliness advantages show great potential in large‐scale energy storage systems. However, their practical application is hindered by Columbic efficiency unstable anode resulting from the side reactions deterioration of dendrites. Herein, tripropylene glycol (TG) chosen as a dual‐functional organic electrolyte additive to improve reversibility AZIBs significantly. Importantly, ab initio molecular dynamics theoretical simulations experiments such situ electrochemical impedance spectroscopy, synchrotron radiation‐based Fourier transform infrared spectroscopy confirm that TG participates solvation sheath Zn 2+ , regulating overpotential inhibiting reactions; meanwhile, inhibits dendrites modifies direction deposition constructing an adsorbed layer on anode. Consequently, Zn‐MnO 2 full cell exhibited specific capacity 124.48 mAh g ‐1 after 1000 cycles at current density 4 A . This quantitative regulation for suitable anode, its easy scalability process can be immediate benefit dendrite‐free, high‐performance, low‐cost

Language: Английский

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Addition of Dioxane in Electrolyte Promotes (002)-Textured Zinc Growth and Suppressed Side Reactions in Zinc-Ion Batteries

ACS Nano, Journal Year: 2023, Volume and Issue: 17(4), P. 3765 - 3775

Published: Feb. 8, 2023

The reversibility and cyclability of aqueous zinc-ion batteries (ZIBs) are largely determined by the stabilization Zn anode. Therefore, a stable anode/electrolyte interface capable inhibiting dendrites side reactions is crucial for high-performing ZIBs. In this study, we investigated adsorption 1,4-dioxane (DX) to promote exposure (002) facets prevent dendrite growth. DX appears reside at suppress detrimental reactions. ZIBs with addition demonstrated long-term cycling stability 1000 h in harsh conditions 10 mA cm–2 an ultrahigh cumulative plated capacity 5 Ah shows good average Coulombic efficiency 99.7%. Zn//NH4V4O10 full battery achieves high specific (202 mAh g–1 A g–1) retention (90.6% after 5000 cycles), much better than that pristine ZnSO4 electrolyte. By selectively adjusting Zn2+ deposition rate on crystal adsorbed molecules, work provides promising modulation strategy molecular level anodes can potentially be applied other metal suffering from instability irreversibility.

Language: Английский

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Ultra‐Stable Aqueous Zinc Batteries Enabled by β‐Cyclodextrin: Preferred Zinc Deposition and Suppressed Parasitic Reactions

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(47)

Published: Sept. 14, 2022

Abstract The intrinsic zinc dendrite growth aggravated by the uneven electric field at Zn anode surface and water‐induced parasitic reactions have largely impeded rechargeable aqueous zinc‐ion batteries for practical applications in large‐scale energy storage. Here, an effective strategy is proposed to manipulate deposition simultaneously prevent generation of insulating by‐products (Zn 4 SO (OH) 6 ·xH 2 O) improved plating/stripping on anodes addition a nontoxic electrolyte additive, β‐cyclodextrin (β‐CD). simulation results indicate that β‐CD molecules prefer adsorb horizontally (002) plane, regulating diffusion pathways sites 2+ preferred along plane without formation inhibiting H O facilitating desolvation [Zn(H ] . Consequently, ultra‐long stable cycling up 1700 h high current density mA cm −2 can be achieved β‐CD, 17 times pure ZnSO remarkable stability also maintained under harsh test condition (40 , 20 mAh ). This study highlights important role engineering interfacial during high‐performing batteries.

Language: Английский

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Polycation‐Regulated Electrolyte and Interfacial Electric Fields for Stable Zinc Metal Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(27)

Published: May 8, 2023

Zn metal as one of promising anode materials for aqueous batteries but suffers from disreputable dendrite growth, grievous hydrogen evolution and corrosion. Here, a polycation additive, polydiallyl dimethylammonium chloride (PDD), is introduced to achieve long-term highly reversible plating/stripping. Specifically, the PDD can simultaneously regulate electric fields electrolyte Zn/electrolyte interface improve Zn2+ migration behaviors guide dominant (002) deposition, which veritably detected by Zeta potential, Kelvin probe force microscopy scanning electrochemical microscopy. Moreover, also creates positive charge-rich protective outer layer N-rich hybrid inner layer, accelerates desolvation during plating process blocks direct contact between water molecules anode. Thereby, reversibility stability anodes are substantially improved, certified higher average coulombic efficiency 99.7 % Zn||Cu cells 22 times longer life Zn||Zn compared with that PDD-free electrolyte.

Language: Английский

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Modulating Cation Migration and Deposition with Xylitol Additive and Oriented Reconstruction of Hydrogen Bonds for Stable Zinc Anodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(10)

Published: Jan. 17, 2023

Highly reversible plating/stripping in aqueous electrolytes is one of the critical processes determining performance Zn-ion batteries, but it severely impeded by parasitic side reaction and dendrite growth. Herein, a novel electrolyte engineering strategy first proposed based on usage 100 mM xylitol additive, which inhibits hydrogen evolution accelerates cations migration expelling active H2 O molecules weakening electrostatic interaction through oriented reconstruction bonds. Concomitantly, are preferentially adsorbed Zn surface, provides shielding buffer layer to retard sedimentation suppress planar diffusion Zn2+ ions. transference number cycling lifespan Zn∥Zn cells have been significantly elevated, overwhelmingly larger than bare ZnSO4 . The cell coupled with NaV3 O8 cathode still behaves much better additive-free device terms capacity retention.

Language: Английский

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Building better aqueous Zn-organic batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2398 - 2431

Published: Jan. 1, 2023

This is a systematic overview focusing on recent developments, energy storage mechanisms, and design improvement strategies for aqueous Zn-organic batteries.

Language: Английский

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ZnF₂‐Riched Inorganic/Organic Hybrid SEI: in situ‐Chemical Construction and Performance‐Improving Mechanism for Aqueous Zinc‐ion Batteries

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(7)

Published: Dec. 7, 2022

Uncontrolled dendrites growth and serious parasitic reactions in aqueous electrolytes, greatly hinder the practical application of zinc-ion battery. On basis situ-chemical construction performance-improving mechanism, multifunctional fluoroethylene carbonate (FEC) is introduced into electrolyte to construct a high-quality ZnF2 -riched inorganic/organic hybrid SEI (ZHS) layer on Zn metal anode (ZMA) surface. Notably, FEC additive can regulate solvated structure Zn2+ reduce H2 O molecules reactivity. Additionally, ZHS with strong affinity avoid formation direct contact between anode. Therefore, growth, corrosion, evolution reaction ZMA FEC-included ZnSO4 are highly suppressed. Thus, such realize long cycle life over 1000 h deliver stable coulombic efficiency 99.1 % after 500 cycles.

Language: Английский

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Electrolyte Regulation of Bio‐Inspired Zincophilic Additive toward High‐Performance Dendrite‐Free Aqueous Zinc‐Ion Batteries

Small, Journal Year: 2023, Volume and Issue: 19(10)

Published: Jan. 17, 2023

Aqueous zinc-ion batteries hold attractive potential for large-scale energy storage devices owing to their prominent electrochemical performance and high security. Nevertheless, the applications of aqueous electrolytes have generated various challenges, including uncontrolled dendrite growth parasitic reactions, thereby deteriorating Zn anode's stability. Herein, inspired by superior affinity between Zn2+ amino acid chains in zinc finger protein, a cost-effective green glycine additive is incorporated into stabilize anode. As confirmed experimental characterizations theoretical calculations, additives can not only reorganize solvation sheaths hydrated via partial substitution coordinated H2 O but also preferentially adsorb onto anode, significantly restraining interfacial side reactions. Accordingly, anode could realize long lifespan over 2000 h enhanced reversibility (98.8%) glycine-containing electrolyte. Furthermore, assembled Zn||α-MnO2 full cells with glycine-modified electrolyte delivers substantial capacity retention (82.3% after 1000 cycles at 2 A g-1 ), showing promising application prospects. This innovative bio-inspired design concept would inject new vitality development electrolytes.

Language: Английский

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Regulating the Inner Helmholtz Plane with a High Donor Additive for Efficient Anode Reversibility in Aqueous Zn‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 24, 2023

The performance of aqueous Zn ion batteries (AZIBs) is highly dependent on inner Helmholtz plane (IHP) chemistry. Notorious parasitic reactions containing hydrogen evolution (HER) and dendrites both originate from abundant free H2 O random deposition inside active IHP. Here, we report a universal high donor number (DN) additive pyridine (Py) with only 1 vol. % addition (Py-to-H2 volume ratio), for regulating molecule distribution Density functional theory (DFT) calculations molecular dynamics (MD) simulation verify that incorporated Py could tailor Zn2+ solvation sheath exclude molecules IHP effectively, which in favor preventing decomposition. Consequently, even at extreme conditions such as depth discharge (DOD) 80 %, the symmetric cell based can sustain approximately 500 h long-term stability. This efficient strategy DN additives furnishes promising direction designing novel electrolytes promoting practical application AZIBs, despite inevitably introducing trace organic additives.

Language: Английский

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