Eutectic Electrolyte with Unique Solvation Structure for High‐Performance Zinc‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(31)

Published: May 24, 2022

Zinc-ion batteries (ZIB) present great potential in energy storage due to low cost and high safety. However, the poor stability, dendrite growth, narrow electrochemical window limit their practical application. Herein, we develop a new eutectic electrolyte consisting of ethylene glycol (EG) ZnCl2 for dendrite-free long-lifespan ZIBs. The EG molecules participate Zn2+ solvation via coordination hydrogen-bond interactions. Optimizing /EG molar ratio (1 : 4) can strengthen intermolecular interactions form [ZnCl(EG)]+ [ZnCl(EG)2 ]+ cations. dissociation-reduction these complex cations enables formation Cl-rich organic-inorganic hybrid solid interphase film on Zn anode, realizing highly reversible plating/stripping with long-term stability ≈3200 h. Furthermore, polyaniline||Zn cell manifests decent cycling performance ≈78 % capacity retention after 10 000 cycles, assembled pouch demonstrates safety stable capacity. This work opens an avenue developing electrolytes high-safety

Language: Английский

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A hydrated deep eutectic electrolyte with finely-tuned solvation chemistry for high-performance zinc-ion batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2540 - 2549

Published: Jan. 1, 2023

A hydrated deep eutectic electrolyte with a water-deficient solvation structure and reduced free water in bulk solution is proposed, resulting highly reversible stable Zn anodes.

Language: Английский

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Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

ACS Nano, Journal Year: 2023, Volume and Issue: 17(3), P. 1764 - 1802

Published: Jan. 30, 2023

The advent of 5G and the Internet Things has spawned a demand for wearable electronic devices. However, lack suitable flexible energy storage system become "Achilles' Heel" Additional problems during transformation battery structure from conventional to also present severe challenge design. Flexible Zn-based batteries, including Zn-ion batteries Zn–air have long been considered promising candidates due their high safety, eco-efficiency, substantial reserve, low cost. In past decade, researchers come up with elaborate designs each portion improve ionic conductivities, mechanical properties, environment adaptabilities, scalable productions. It would be helpful summarize reported strategies compare pros cons facilitate further research toward commercialization batteries. this review, current progress in developing is comprehensively reviewed, electrolytes, cathodes, anodes, discussed terms synthesis, characterization, performance validation. By clarifying challenges design, we methodology previous investigations propose future development. end, paradigm summarized fit burgeoning requirement devices an iterative process, which will benefit development

Language: Английский

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Polyhydroxylated Organic Molecular Additives for Durable Aqueous Zinc Battery

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(4)

Published: Sept. 27, 2023

Abstract The large‐scale deployment of aqueous Zn‐ion batteries is hindered by Zn anode instability including surface corrosion, hydrogen gas evolution, and irregular deposition. To tackle these challenges, a polyhydroxylated organic molecular additive, trehalose, incorporated to refine the solvation structure promote planar Within regions involving hydroxy groups participate in reconstruction bond networks, which increases overpotential for water decomposition reaction. Moreover, at metal–molecule interface, chemisorption trehalose onto zinc enhances corrosion resistance facilitates deposition manner. optimized electrolyte significantly improves striping/plating reversibility maintains stable potentials over 1600 h 5 mA cm −2 with cutoff capacity 1 symmetric cells. When combined MnO 2 cathode, assembled coin cell retains ≈89% its after 1000 cycles. This molecule emphasizing role molecules fine‐tuning structures anode/electrolyte interfaces, holds promise enhancing various metal batteries.

Language: Английский

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Does Water‐in‐Salt Electrolyte Subdue Issues of Zn Batteries?

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(36)

Published: May 23, 2023

Zn-metal batteries (ZnBs) are safe and sustainable because of their operability in aqueous electrolytes, abundance Zn, recyclability. However, the thermodynamic instability Zn metal electrolytes is a major bottleneck for its commercialization. As such, deposition (Zn2+ → Zn(s)) continuously accompanied by hydrogen evolution reaction (HER) (2H+ H2 ) dendritic growth that further accentuate HER. Consequently, local pH around electrode increases promotes formation inactive and/or poorly conductive passivation species (Zn + 2H2 O Zn(OH)2 on Zn. This aggravates consumption electrolyte degrades performance ZnB. To propel HER beyond potential (0 V vs standard (SHE) at 0), concept water-in-salt-electrolyte (WISE) has been employed ZnBs. Since publication first article WISE ZnB 2016, this research area progressed continuously. Here, an overview discussion promising direction accelerating maturity ZnBs provided. The review briefly describes current issues with conventional ZnBs, including historic basic understanding WISE. Furthermore, application scenarios detailed, description various key mechanisms (e.g., side reactions, electrodeposition, anions or cations intercalation oxide graphite, ion transport low temperature).

Language: Английский

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Ag_xZn_y Protective Coatings with Selective Zn²⁺/H⁺ Binding Enable Reversible Zn Anodes

Nano Letters, Journal Year: 2023, Volume and Issue: 23(13), P. 6156 - 6163

Published: June 28, 2023

Zinc (Zn) metal anodes suffer from the dendrite growth and hydrogen evolution reaction (HER) in classical aqueous electrolytes, which severely limit their lifespan. We propose a rational design of AgxZny protective coatings with selective binding to Zn2+ against H+ simultaneously regulate Zn pattern HER kinetics. further demonstrate that by tuning composition coating deposition behavior can be readily tuned conventional plating/stripping (on Zn-AgZn3 coating) alloying/dealloying Ag-AgZn coating), resulting precise control pattern. Moreover, synergy Ag suppresses competitive HER. As result, modified possess significantly enhanced This work provides new strategy for enhancing stability potentially other precisely manipulating strength protons charge carriers batteries.

Language: Английский

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Insight on the Double‐Edged Sword Role of Water Molecules in the Anode of Aqueous Zinc‐Ion Batteries

Small Structures, Journal Year: 2022, Volume and Issue: 3(12)

Published: Sept. 23, 2022

As promising candidates for aqueous metal batteries, zinc‐ion batteries (ZIBs) have attracted more attention due to their superior safety, low cost, and environmentally benign characteristics. Solvent water plays a double‐edged sword role that cannot be ignored in the electrochemical performance long cycling stability of batteries. The hydrated zinc ions solvated structure can boost diffusion kinetics ions, whereas released active molecules during desolvation lead notorious hydrogen evolution reactions, dendrites growth, surface passivation at unstable interface between electrolyte anode. Unlike previous reports summarize recent research progress, this review focuses on anode processes ZIBs. influencing mechanism energy storage process is systematically discussed, including basic theory, regulation strategies, reports. two‐faced identity profoundly revealed herein, some revelatory insights possible strategies are provided future design stable durable anodes high‐performance

Language: Английский

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Eutectic electrolytes with leveling effects achieving high depth-of-discharge of rechargeable zinc batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 58, P. 9 - 19

Published: March 12, 2023

Language: Английский

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Advanced electrolytes for high-performance aqueous zinc-ion batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review presents an comprehensive overview of various advanced aqueous electrolytes for zinc-ion batteries, including “water-in-salt” electrolytes, eutectic molecular crowding and hydrogel electrolytes.

Language: Английский

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Gradient‐Structured and Robust Solid Electrolyte Interphase In Situ Formed by Hydrated Eutectic Electrolytes for High‐Performance Zinc Metal Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(8)

Published: Jan. 26, 2024

Abstract The mechanically and electrochemically stable ionically conducting solid electrolyte interphase (SEI) is important for the stabilization of metal anodes. Since SEIs are originally absent in aqueous zinc batteries (AZMBs), it very challenging to suppress water‐induced side reactions dendrite growth Zn anodes (ZMAs). Herein, a gradient‐structured robust gradient SEI, consisting B,O‐inner F,O‐exterior layer, situ formed by hydrated eutectic homogeneous reversible deposition, demonstrated. Moreover, molar ratio acetamide salt modulated prohibit water activity hydrolysis BF 4 − as well achieve high ionic conductivity owing regulation solvation sheath 2+ . Consequently, allows Zn||Zn symmetric cells cycling lifespan over 4400 h at 0.5 mA cm −2 Zn||PANI full deliver capacity retention 73.2% 4000 cycles 1 A g −1 demonstrate operation low temperatures. This work provides rational design corresponding dendrite‐free even under harsh conditions.

Language: Английский

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