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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Biocompatible zinc battery with programmable electro-cross-linked electrolyte

National Science Review, Journal Year: 2022, Volume and Issue: 10(3)

Published: Dec. 12, 2022

Aqueous zinc batteries (ZBs) attract increasing attention for potential applications in modern wearable and implantable devices due to their safety stability. However, challenges associated with biosafety designs the intrinsic electrochemistry of ZBs emerge when moving practice, especially biomedical devices. Here, we propose a green programmable electro-cross-linking strategy situ prepare multi-layer hierarchical Zn-alginate polymer electrolyte (Zn-Alg) via superionic binds between carboxylate groups Zn2+. Consequently, Zn-Alg provides high reversibility 99.65% Coulombic efficiency (CE), >500 h long-time stability biocompatibility (no damage gastric duodenal mucosa) body. A wire-shaped Zn/Zn-Alg/α-MnO2 full battery affords 95% capacity retention after 100 cycles at 1 g-1 good flexibility. The new has three prominent advantages over conventional methods: (i) cross-linking process synthesis electrolytes avoids introduction any chemical reagents or initiators; (ii) highly reversible Zn is easily provided from micrometer large scales through automatic functions; (iii) capable implanted bio-integrated ensure body safety.

Language: Английский

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Amphoteric Cellulose‐Based Double‐Network Hydrogel Electrolyte Toward Ultra‐Stable Zn Anode

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(13)

Published: Feb. 1, 2023

Zinc (Zn) metal anode suffers from uncontrollable Zn dendrites and parasitic side reactions at the interface, which restrict practical application of aqueous rechargeable zinc batteries (ARZBs). Herein, an amphoteric cellulose-based double-network is introduced as hydrogel electrolyte to overcome these obstacles. On one hand, groups build anion/cation transport channels regulate electro-deposition behavior on (002) crystal plane enabled by homogenizing Zn2+ ions flux. other strong bonding between negatively charged carboxyl promote desolvation process [Zn(H2 O)6 ]2+ eliminate reactions. Based above two functions, enables ultra-stable cycling with a cumulative capacity 7 Ah cm-2 20 mA /20 mAh for Zn||Zn cell. This work provides significant concepts developing electrolytes realize stable high-performance ARZBs.

Language: Английский

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Solvation Structures in Aqueous Metal‐Ion Batteries

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(37)

Published: Aug. 11, 2022

Abstract Aqueous batteries have attracted great attention due to their inherent low cost, intrinsic safety, and environmental friendliness. Because of oxygen evolution reactions (OER) hydrogen (HER) via water splitting, aqueous possess narrow electrochemical stability windows (ESWs, theoretical ESW is 1.23 V), leading output voltage delivered capacity, thus energy density. Meanwhile, the parasitic side electrode materials dissolution, gas evolution, dendrite growth can shorten cyclic batteries. The above deep‐seated challenges are closely related solvation structure metal ions, which be settled by adjusting regulating structure. This review summarizes research progress in structures metal‐ion First, design principles its impact on battery performance introduced. Second, regulation introduced from three points view: high concentration salt strategies, MOF modification electrolyte additives. After that, commonly used characterization methods for summarized. Finally, existing problems frontier

Language: Английский

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A eutectic electrolyte for an ultralong-lived Zn//V₂O₅cell: anin situgenerated gradient solid-electrolyte interphase

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3587 - 3599

Published: Jan. 1, 2023

This study achieved dendrite-free Zn metal anodes for Zn-ion batteries via an in situ generated gradient organic/inorganic hybrid solid–electrolyte interphase enabled by a eutectic electrolyte.

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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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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Dual‐Network Structured Hydrogel Electrolytes Engaged Solid‐State Rechargeable Zn‐Air/Iodide Hybrid Batteries

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(44)

Published: Sept. 12, 2022

As a key component of batteries, the electrolyte determines ion transport and interface chemistry cathode anode. In this work, we develop dual-network structured hydrogel composed polyacrylamide (PAM), sodium alginate (SA) potassium iodide (KI) for solid-state zinc-air/iodide hybrid batteries. The assembled battery shows excellent renewability long cycling life 110 h with high energy efficiency 80 %. ion-crosslinked structure endows material improved mechanical strength increased ionic conductivity. More importantly, introduction iodine species not only offers more favorable cathodic kinetics iodide/iodate redox than oxygen electrocatalysis but also regulates solvation zinc ions to ensure better stability. This work provides significant concepts developing novel electrolytes realize high-performance devices technologies.

Language: Английский

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Eutectic Electrolytes with Doubly‐Bound Water for High‐Stability Zinc Anodes

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(52)

Published: Oct. 26, 2022

Abstract The aqueous zinc‐ion battery has the advantages of environmental friendliness, safety, and reliability, which is expected to be used for large‐scale energy storage. However, due high activity water, hydrogen evolution reaction (HER) easily occurs on surface zinc anode during charge–discharge process, accompanied by corrosion, by‐products, dendrite formation. Herein, a new‐type eutectic electrolyte consisting ZnCl 2 , tetramethylurea (TMU), H O with optimal molar ratio 1:3:1 (ZT‐1) developed high‐stability anodes. in this system doubly bound through coordination Zn 2+ bonding TMU, thus leading greatly inhibited O. In addition, TMU are successively stripped desolvation process (TMU)(H O), followed deposition [ZnCl ] at interface. way, tendency HER, dendrites, by‐products induced decomposition molecules interface minimized, enabling much more stable plating/stripping . Consequently, Zn//Zn symmetric cell can stably cycle >2000 h, while Zn//Cu half 800 times an average Coulombic efficiency 99.5%.

Language: Английский

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Reviving Zn⁰ Dendrites to Electroactive Zn²⁺ by Mesoporous MXene with Active Edge Sites

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(44), P. 24284 - 24293

Published: Oct. 27, 2023

Zinc metal-based aqueous batteries (ZABs) offer a sustainable, affordable, and safe energy storage alternative to lithium, yet inevitable dendrite formation impedes their wide use, especially under long-term high-rate cycles. How the battery can survive after remains an open question. Here, we pivot from conventional Zn growth suppression strategies, introducing proactive dendrite-digesting chemistry via mesoporous Ti3C2 MXene (MesoTi3C2)-wrapped polypropylene separator. Spectroscopic characterizations electrochemical evaluation demonstrate that MesoTi3C2, acting as oxidant, revive formed dead Zn0 dendrites into electroactive Zn2+ ions through spontaneous redox process. Density functional theory reveals abundant edge-Ti-O sites in our MesoTi3C2 facilitate high oxidizability electron transfer compared in-plane counterparts. The resultant asymmetrical cell demonstrates remarkable ultralong cycle life of 2200 h at practical current 5 mA cm-2 with low overpotential (<50 mV). study unexpected edge effect MXenes uncovers new ZABs, albeit formation.

Language: Английский

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