Activating and Stabilizing a Reversible four Electron Redox Reaction of I⁻/I⁺ for Aqueous Zn‐Iodine Battery

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(25)

Published: March 19, 2024

Abstract Low capacity and poor cycle stability greatly inhibit the development of zinc‐iodine batteries. Herein, a high‐performance Zn‐iodine battery has been reached by designing optimizing both electrode electrolyte. The Br − is introduced as activator to trigger I + , coupled with forming interhalogen stabilize achieve four‐electron reaction, which promotes capacity. And Ni−Fe−I LDH nanoflowers serve confinement host enable reactions /I occurring in layer due spacious stable interlayer spacing LDH, effectively suppresses iodine‐species shuttle ensuring high cycling stability. As result, electrochemical performance enhanced, especially specific (as 350 mAh g −1 at 1 A far higher than two‐electron transfer batteries) (94.6 % retention after 10000 cycles). This strategy provides new way realize long‐term

Language: Английский

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Ultrastable Electrolytic Zn–I₂ Batteries Based on Nanocarbon Wrapped by Highly Efficient Single‐Atom Fe‐NC Iodine Catalysts

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 8, 2024

Aqueous Zn-iodine (Zn-I

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Anion‐Regulated Electric Double Layer and Progressive Nucleation Enable Uniform and Nanoscale Zn Deposition for Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 19, 2024

Abstract Aqueous zinc‐ion batteries have been regarded as safe and cheap energy storage devices. However, severe zinc dendrite growth water decomposition limit the sustainability of aqueous batteries. Herein, sodium‐difluoro(oxalato)borate (NaDFOB) is introduced into ZnSO 4 electrolyte to modify electric double layer (EDL) nucleation mechanism. Electrochemical tests density functional theory calculations reveal that DFOB − adsorbs on electrode form a water‐poor EDL, effectively suppressing side reactions. Notably, detailed investigation deposition demonstrates adsorbed ions induce progressive nucleation, resulting in nanoscale nuclei uniform growth. Additionally, decompose solid interphase, further protecting electrode. Consequently, Zn/Zn symmetric cell using /NaDFOB can cycle for over 500 h at 5 mA cm −2 reach capacity 10 mAh , while Zn/Cu half maintains an average Coulombic efficiency 99.3% 400 cycles. A high retention 93.0% with 250 g −1 0.2 achieved full cycling. These findings highlight impact anion‐modified EDL achieving highly deposition.

Language: Английский

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Precisely Constructing Orbital‐Coupled Fe─Co Dual‐atom Sites for High‐Energy‐Efficiency Zn–Air/Iodide Hybrid Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: May 30, 2024

Abstract Rechargeable Zn–air batteries (ZABs) are promising for energy storage and conversion. However, the high charging voltage low efficiency hinder their commercialization. Herein, these challenges addressed by employing precisely constructed multifunctional Fe–Co diatomic site catalysts (FeCo‐DACs) integrating iodide/iodate redox into ZABs to create Zinc–air/iodide hybrid (ZAIHBs) with highly efficient catalyst. The strong coupling between 3d orbitals of Fe Co weakens excessively binding strength active sites intermediates, enhancing catalytic activities oxygen reduction/evolution reaction redox. Consequently, FeCo‐DACs exhibit outstanding bifunctional activity a small potential gap (Δ E = 0.66 V) stability. Moreover, an performance toward is obtained. Therefore, FeCo‐DAC‐based ZAIHBs up 75% at 10 mA cm −2 excellent cycling stability (72% after 500 h). This research offers critical insights rational design DACs paves way high‐energy devices.

Language: Английский

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MBene with Redox‐Active Terminal Groups for an Energy‐Dense Cascade Aqueous Battery

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 16, 2024

Abstract Two‐dimensional (2D) transition metal borides (MBenes), new members of the 2D materials family, hold great promise for use in electrocatalytic and energy storage fields because their high specific area, chemical activity, fast charge carrier mobility. Although various types MBenes are reported, layered featuring redox‐active terminal groups output not yet produced. A facile energy‐efficient method synthesizing equipped with cascade Zn||I 2 batteries is presented. Layered have ordered vacancies ─Br groups, enabling sequential reactions I − /I 0 Br /Br . The ‐hosting MBene‐Br cathode results a as 485.8 Wh kg −1 at 899.7 W power 6007.7 180.2 , far exceeding best records batteries. this study demonstrate that challenges MBene synthesis can be overcome reveal an efficient path producing high‐performance electrode energy‐dense aqueous

Language: Английский

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Surface Patterning of Metal Zinc Electrode with an In-Region Zincophilic Interface for High-Rate and Long-Cycle-Life Zinc Metal Anode

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

Published: Feb. 9, 2024

Abstract The undesirable dendrite growth induced by non-planar zinc (Zn) deposition and low Coulombic efficiency resulting from severe side reactions have been long-standing challenges for metallic Zn anodes substantially impede the practical application of rechargeable aqueous metal batteries (ZMBs). Herein, we present a strategy achieving high-rate long-cycle-life anode patterning foil surfaces endowing Zn-Indium (Zn-In) interface in microchannels. accumulation electrons microchannel zincophilicity Zn-In promote preferential heteroepitaxial region enhance tolerance electrode at high current densities. Meanwhile, electron aggregation accelerates dissolution non-(002) plane atoms on array surface, thereby directing subsequent homoepitaxial surface. Consequently, planar dendrite-free long-term cycling stability are achieved (5,050 h 10.0 mA cm −2 27,000 cycles 20.0 ). Furthermore, Zn/I 2 full cell assembled pairing with such an can maintain good 3,500 5.0 C, demonstrating potential as-prepared ZnIn high-performance ZMBs.

Language: Английский

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Latent Solvent Induced Reliable Interfacial Chemistry Toward Highly Reversible Zn Anodes

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(27)

Published: April 29, 2024

Abstract Aqueous zinc‐ion batteries have garnered renewed interest owing to their inherent safety and cost‐effectiveness. However, Zn anode suffers from notorious side reactions dendrite growth, compromising the battery performance. Designing anion‐containing solvation structures facilitate in situ formation of a solid electrolyte interphase (SEI) layer proves effective protecting anode, yet balancing interactions between cations‐solvents cations–anions remains significant challenge. Herein, latent solvent (hexafluoroisopropanol) with specific anion‐philic cation‐phobic properties is introduced, which can remarkably increase Zn(TFSI) 2 solubility water induce structures. The introduction enables anions preferentially decompose, giving rise an anion‐derived SEI layer. More interestingly, direct anion‐cation interaction endows 2+ species stepwise dehydration, minimizing adsorption on anode. optimized de‐solvation process work synergy enable homogeneous deposition ensure high reversibility. When coupled NaV 3 O 8 ·1.5H (NVO) cathode, resultant full cell delivers high‐capacity retention 87.8% after 2000 cycles at 1 A g −1 . This provides valuable insights into advanced design beyond.

Language: Английский

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Asymmetric Electrolytes Design for Aqueous Multivalent Metal Ion Batteries

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Dec. 15, 2023

With the rapid development of portable electronics and electric road vehicles, high-energy-density batteries have been becoming front-burner issues. Traditionally, homogeneous electrolyte cannot simultaneously meet diametrically opposed demands high-potential cathode low-potential anode, which are essential for high-voltage batteries. Meanwhile, is difficult to achieve bi- or multi-functions different requirements electrodes. In comparison, asymmetric with multi-layer disparate components can satisfy distinct by playing roles each layer meanwhile compensates weakness individual electrolyte. Consequently, not only suppress by-product sedimentation continuous decomposition at anode while preserving active substances long cyclic lifespan. this review, we comprehensively divide electrolytes into three categories: decoupled liquid-state electrolytes, bi-phase solid/liquid solid-state electrolytes. The design principles, reaction mechanism mutual compatibility also studied, respectively. Finally, provide a comprehensive vision simplification structure reduce costs increase device energy density, optimization solvation anolyte/catholyte interface realize fast ion transport kinetics.

Language: Английский

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Fast Reaction Kinetics and Commendable Low‐Temperature Adaptability of Zinc Batteries Enabled by Aprotic Water‐Acetamide Symbiotic Solvation Sheath

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(8)

Published: Dec. 13, 2023

Although rechargeable aqueous zinc batteries are cost effectiveness, intrinsicly safe, and high activity, they also known for bringing rampant hydrogen evolution reaction corrosion. While eutectic electrolytes can effectively eliminate these issues, its viscosity severely reduces the mobility of Zn

Language: Английский

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High‐Performance Wide‐pH Zn‐Based Batteries via Electrode Interface Regulation with Valine Additive

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 15, 2023

Abstract Aqueous zinc (Zn) based batteries show great promise as energy storage devices, cost‐effectiveness, and intrinsic safety. However, the development of Zn‐based faces significant challenges, primarily stemming from poor electrochemical reversibility caused by dendrite growth, hydrogen generation, byproduct formation on Zn anode. In this study, valine (Val) is investigated an electrolyte additive to finely tune interface microenvironment, resulting in enhanced stability anode across a wide pH range, marking first time such approach has been explored. Val ions preferably adsorb onto active sites surface, enabling efficient isolation water SO 4 2− desolvated shell layer thus effectively inhibiting growth. The Zn||Zn symmetric cells are demonstrated with additives present remarkable cycling performance 5400 h. Furthermore, Zn||MnO 2 full exhibit stable operation for 5000 cycles at 3 A g −1 . Notably, also functions rechargeable alkaline cells, Zn||Ni 0.8 Co 0.1 Mn O operate durably temperature range. This work offers unique insights into engineering aqueous batteries, especially terms their compatibility

Language: Английский

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