Excluding the Trouble from Interfacial Water by Covalent Organic Polymer to Realize Extremely Reversible Zn Anode

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(37)

Published: May 24, 2023

Abstract The side reactions related to water are the major issue hindering practical application of Zn metal batteries. To exclude trouble from interfacial water, a covalent organic polymer (COP) layer with N, N′‐Bis(salicylidene)ethylenediamine structure is designed, whose strong coordination ability 2+ enhances de‐solvation kinetics solvated which conducive removal thus alleviating water. This function has been certified by density functional theory along molecular dynamics analysis. Moreover, measurements including in situ electrochemical gas chromatography, optical microscopy, X‐ray diffraction and Raman spectroscopy verify weakened (including hydrogen evolution corrosion) homogenous deposition contributed layer. Benefiting these merits, when assemble into cells based on common ZnSO 4 ‐based aqueous electrolyte, COP layer‐decorated anode exhibits excellent performance high average Coulombic efficiency value 99.5% at capacity 5.0 mA h cm −2 . What's more, symmetric can operate −20 °C full cell N/P ratio as low 1.2 cycle stably for 100 cycles, would carry forward promising

Language: Английский

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Interface Engineering for Aqueous Aluminum Metal Batteries: Current Progresses and Future Prospects

Small Methods, Journal Year: 2023, Volume and Issue: 8(6)

Published: Aug. 16, 2023

Aqueous aluminum metal batteries (AMBs) have attracted numerous attention because of the abundant reserves, low cost, high theoretical capacity, and safety. Nevertheless, poor thermodynamics stability metallic Al anode in aqueous solution, which is caused by self-corrosion, surface passivation, or hydrogen evolution reaction, dramatically limits electrochemical performance hampers further development AMBs. In this comprehensive review, key scientific challenges anode/electrolyte interface (AEI) are highlighted. A systematic overview also provided about recent progress on rational engineering principles toward a relatively stable AEI. Finally, suggestions perspectives for future research offered optimization electrolytes to enable durable AEI, may pave way developing high-performance

Language: Английский

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Hydrophobic Hyamine‐Mediated Water‐Lean Electric Double Layer Boosting Reversible Dendrite‐Free Zinc Metal Anodes

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(11)

Published: Dec. 12, 2023

Abstract Aqueous zinc‐ion batteries (ZIBs) are promising candidates for grid‐energy storage due to their safety and cost‐effectiveness. However, the detrimental hydrogen evolution reaction (HER) dendrite growth on Zn‐metal anodes severely limit applications. Herein, trace hydrophobic hyamine (HQA, 0.78 mmol L −1 ) is introduced as an electrolyte additive improve electrochemical performance of Zn anode. Experiments theoretical calculations revealed that cationic HQA can preferentially adsorb onto anode surface inhibit HER promote uniform distribution ions by forming a water‐lean electric double layer (EDL). Moreover, oriented adsorption induced exposure (002) plane prevented growth. Therefore, symmetric cells using HQA‐containing exhibited stable cycle more than 1600 h. Even at high‐density current 5 mA cm −2 , it has high cumulative capacity 3250 mAh . It excellent deep‐discharge (80%) with 175 The Zn||NH 4 V O 10 full cell specific stability 4.0 A g reversibility These results provide new low‐cost approach design EDL optimization high‐performance batteries.

Language: Английский

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Regulating the Interfacial Charge Density by Constructing a Novel Zn Anode‐Electrolyte Interface for Highly Reversible Zn Anode

Chemistry - A European Journal, Journal Year: 2023, Volume and Issue: 30(3)

Published: Nov. 1, 2023

Abstract Aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention. However, due to the uneven distribution of charge density at Zn anode‐electrolyte interface, severe dendrites and corrosion are generated during cycling. In this work, a facile scalable strategy address above‐mentioned issues has been proposed through regulating interface. As proof concept, amidinothiourea (ATU) with abundant lone‐pair electrons is employed as an interfacial modifier for The uniform increased on interface obtained. Moreover, unique Zn‐bond constructed between N atoms 2+ well hydrogen bonds formed among ATU Ac − anion/active H 2 O, which promote migration desolvation behavior Accordingly, trace concentration 0.01 mg mL −1 ATU, these features endow anode long cycling life (more than 800 h), high average Columbic efficiency (99.52 %) Zn||Cu batteries. When pairing I cathode, improved ability (5000 cycles) capacity retention 77.9 % achieved. fundamental understanding regulation can facilitate development AZIBs.

Language: Английский

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Robust Artificial Interlayer with High Ionic Conductivity and Mechanical Strength toward Long‐Life Na‐Metal Batteries

Small Science, Journal Year: 2023, Volume and Issue: 3(7)

Published: June 7, 2023

Sodium metal, benefiting from its high theoretical capacity and natural abundance, is regarded as a promising anode for sodium‐metal batteries (SMBs). Unfortunately, the uncontrollable sodium dendrites formation caused sluggish ion‐transport kinetics fragile solid electrolyte interphase (SEI) interlayer induces low Coulombic efficiency poor cycling stability. Constructing an artificial SEI with ionic conductivity, stability, mechanical toughness effective strategy Na‐metal anode, yet it still presents major challenge current density long life. Herein, composed of Na–Sn alloy, Sn, Na 2 Te (denoted NST) designed via in‐situ conversion/alloying reaction tin telluride (SnTe) Na. Such possesses rapid + ‐transport Young's modulus (5.3 GPa), benefitting to even plating/stripping suppressing dendrite growth. Owing these merits, symmetrical Na/NST cell ultralong cycle life span over 1390 h small voltage hysteresis at 1 mA cm −2 mAh . And 3 V (PO 4 ) (NVP)||Na/NST full exhibits prolonged 1000 cycles high‐capacity retention 88% 5C. provided construct high‐performance SMBs.

Language: Английский

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