A biocompatible electrolyte enables highly reversible Zn anode for zinc ion battery

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 16, 2023

Progress towards the integration of technology into living organisms requires power devices that are biocompatible and mechanically flexible. Aqueous zinc ion batteries use hydrogel biomaterials as electrolytes have emerged a potential solution operates within biological constraints; however, most these feature inferior electrochemical properties. Here, we propose electrolyte by utilising hyaluronic acid, which contains ample hydrophilic functional groups. The gel-based offers excellent anti-corrosion ability for anodes regulates nucleation/growth. Also, gel provides high battery performance, including 99.71% Coulombic efficiency, over 5500 hours long-term stability, improved cycle life 250 under utilization rate 80%, biocompatibility. Importantly, Zn//LiMn2O4 pouch cell exhibits 82% capacity retention after 1000 cycles at 3 C. This work presents promising chemistry controls behaviour, offering great in energy-related applications beyond.

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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Covalent Organic Framework with 3D Ordered Channel and Multi-Functional Groups Endows Zn Anode with Superior Stability

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 4, 2024

Abstract Achieving a highly robust zinc (Zn) metal anode is extremely important for improving the performance of aqueous Zn-ion batteries (AZIBs) advancing “carbon neutrality” society, which hampered by uncontrollable growth Zn dendrite and severe side reactions including hydrogen evolution reaction, corrosion, passivation, etc. Herein, an interlayer containing fluorinated zincophilic covalent organic framework with sulfonic acid groups (COF-S-F) developed on (Zn@COF-S-F) as artificial solid electrolyte interface (SEI). Sulfonic group (− SO 3 H) in COF-S-F can effectively ameliorate desolvation process hydrated ions, three-dimensional channel fluoride (-F) provide interconnected channels favorable transport ions ion-confinement effects, endowing Zn@COF-S-F dendrite-free morphology suppressed reactions. Consequently, symmetric cell stably cycle 1,000 h low average hysteresis voltage (50.5 mV) at current density 1.5 mA cm −2 . Zn@COF-S-F|MnO 2 delivers discharge specific capacity 206.8 mAh g −1 1.2 A after 800 cycles high-capacity retention (87.9%). Enlightening, building SEI metallic surface targeted design has been proved effective strategy to foster practical application high-performance AZIBs.

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, Journal Year: 2023, Volume and Issue: 135(21)

Published: March 24, 2023

Abstract 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 H 2 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‐H volume ratio), for regulating molecule distribution Density functional theory (DFT) calculations molecular dynamics (MD) simulation verify that incorporated Py could tailor 2+ 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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Polymers for flexible energy storage devices

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101714 - 101714

Published: June 25, 2023

Language: Английский

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Global “Interface‐Space” Dual‐Modulation by Functional Supramolecules Organic Frameworks on Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(10)

Published: Nov. 21, 2023

Abstract The uneven zinc‐ion flux and interfacial contact between the anode electrolyte trigger malignant dendrites byproducts, significantly hindering practical application of zinc‐metal batteries. Herein, a H‐bonded supramolecular organic framework (HSOF) is proposed to help regulate Zn 2+ stabilize chemistry. self‐assembled supermolecule structures by in‐plane H‐bond networks firmly trap water molecules assist de‐solvation block corrosion. abundant polar groups provide strong guidance for distribution, ensuring homogeneous, rapid ion transport‐deposition kinetics. Meanwhile, π – stacked space‐layout structure affords preferred Zn(002) plane stacking smooth flat growth. Benefiting from these advantages, HSOFs are employed on surface adjustment separator decoration spatial manipulation, successfully realizing an overall “interface‐space” dual‐regulation effect. It delivers over 3000 h HSOF@Zn in symmetric cell up 5000 HSOF‐decorated Zn||Zn cell, respectively. HSOF@Zn||V 2 O 5 full with demonstrates enhanced capacity retention 92.7% after 2500 cycles at A g −1 . can be easily scaled into pouch which still has rate 94% 1000 cycles.

Language: Английский

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Biomimetic Superstructured Interphase for Aqueous Zinc-Ion Batteries

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(22), P. 15496 - 15505

Published: May 24, 2024

The practical application of aqueous zinc-ion batteries (AZIBs) is greatly challenged by rampant dendrites and pestilent side reactions resulting from an unstable Zn–electrolyte interphase. Herein, we report the construction a reliable superstructured solid electrolyte interphase for stable Zn anodes using mesoporous polydopamine (2D-mPDA) platelets as building blocks. shows biomimetic nacre's "brick-and-mortar" structure artificial transmembrane channels hexagonally ordered mesopores in plane, overcoming mechanical robustness ionic conductivity trade-off. Experimental results simulations reveal that −OH −NH groups on surface ion can promote rapid desolvation kinetics serve sieve to homogenize Zn2+ flux, thus inhibiting ensuring uniform deposition without dendrites. 2D-mPDA@Zn electrode achieves ultralow nucleation potential 35 mV maintains Coulombic efficiency 99.8% over 1500 cycles at 5 mA cm–2. Moreover, symmetric battery exhibits prolonged lifespan 580 h high current density 20 This also demonstrates feasibility Zn//VO2 full cells paves new route rechargeable metal-ion batteries.

Language: Английский

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In Situ Electrochemically‐Bonded Self‐Adapting Polymeric Interface for Durable Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 27, 2023

Abstract The implementation of aqueous zinc ion batteries (AZBs) is hindered by the notorious Zn dendrite growth and side reactions on anodes. Herein, a novel strategy introduced to overcome these hurdles designing self‐adapting soft polymeric composite interface (SAP). Unlike conventional methods relying passive coating process, approach leverages dynamic in situ electrochemical bonding via Zn─O interactions formed during cycling, ensuring intimate contact between SAP electrode. boasts robust network hydrogen electrostatic interactions, which not only promotes desolvation 2+ repulsion SO 4 2− , facilitating uniform rapid migration while effectively suppressing parasitic reactions; but also exhibits remarkable self‐healing capabilities, enabling accommodate volume changes repair mechanical failures over prolonged cycling. Consequently, highly reversible electrodes are achieved with SAP, showcasing 3300 h at 1 mA cm −2 /0.5 mAh 350 20 /10 symmetric cells. advantages further verified when paired high mass loading LiMn 2 O cathodes AZBs. versatile offers insights into advanced design for efficient durable

Language: Английский

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Self‐Assembled Robust Interfacial Layer for Dendrite‐Free and Flexible Zinc‐Based Energy Storage

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(17)

Published: Jan. 5, 2024

Abstract Aqueous zinc‐based energy storage systems (Zn‐ESSs) with intrinsic safety and good electrochemical performance are promising power suppliers for flexible electronics, whereas unstable zinc anodes especially in Zn‐ESSs pose a challenge. Herein, self‐assembled robust interfacial layer to achieve stable non‐flexible is reported. Specifically, their slowly‐released Zn 2+ simultaneously interact tannic acid molecules ethanol–water solutions, triggering the self‐assembly of acid/Zn complex (CIL) that firmly anchors on anodes. The CIL containing abundant carboxyl phenolic hydroxyl functional groups provides rich zincophilic sites homogenize flux accelerate desolvation‐deposition, traps H + /H 2 O species prevent them from corroding anodes, thereby stabilizing deposition interface. Consequently, CIL@Zn present superior stability an operation lifetime exceeding 700 h even at 5 mA cm −2 (28 times longer than bare anodes) ultrahigh cumulative plated capacity ≈1.8 Ah . firm anchoring enables endure diverse deformations, thus realizing highly anode‐based Zn‐ESSs. This work thinking designing promoting development storage.

Language: Английский

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Strategies for pH regulation in aqueous zinc ion batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 67, P. 103248 - 103248

Published: Feb. 5, 2024

Aqueous zinc ions batteries (AZIBs) using non-organic electrolytes have garnered sustained interest as a future energy storage technology, primarily due to their low cost, environmental friendliness, and intrinsic safety. However, ion suffer from series of serious challenges, including hydrogen evolution reaction (HER) at the anode, surface passivation, dendrite formation, well limited operating voltage comparatively density. These factors are all influenced by concentration H+ in electrolyte (i.e., pH), its fluctuations during cycle process. To date, there remains lack systematic evaluation correlation between pH value challenges faced AZIBs, or focused review how influences electrochemical performance AZIBs strategies that can be used improve cell efficiency. In this we emphasize strong detail research progress made recent years relating additives, separator modification, interfacial protective layers, battery system design, with particular focus on regulatory mechanisms associated control. On basis, propose important focuses suggestions for onward development AZIBs.

Language: Английский

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