Inhibition of Vanadium Cathodes Dissolution in Aqueous Zn‐Ion Batteries

Advanced Materials, Год журнала: 2024, Номер 36(14)

Опубликована: Янв. 16, 2024

Aqueous zinc-ion batteries (AZIBs) have experienced a rapid surge in popularity, as evident from the extensive research with over 30 000 articles published past 5 years. Previous studies on AZIBs showcased impressive long-cycle stability at high current densities, achieving thousands or tens of cycles. However, practical low densities (<1C) is restricted to merely 50-100 cycles due intensified cathode dissolution. This genuine limitation poses considerable challenge their transition laboratory industry. In this study, leveraging density functional theory (DFT) calculations, an artificial interphase that achieves both hydrophobicity and restriction outward penetration dissolved vanadium cations, thereby shifting reaction equilibrium suppressing dissolution following Le Chatelier's principle, described. The approach has resulted one best cycling stabilities date, no noticeable capacity fading after more than 200 (≈720 h) mA g

Язык: Английский

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Electric-field harmony in V2C/V2O5 heterointerfaces toward high-performance aqueous Zn-ion batteries

Energy storage materials, Год журнала: 2023, Номер 60, С. 102835 - 102835

Опубликована: Июнь 1, 2023

Язык: Английский

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Boosting zinc-ion storage in vanadium oxide via“dual-engineering” strategy

Nano Energy, Год журнала: 2023, Номер 115, С. 108736 - 108736

Опубликована: Июль 25, 2023

Язык: Английский

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General Carbon Modification Avenue to Construct Highly Stable V₂O₅ Electrodes for Aqueous Zinc-Ion Batteries

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(36), С. 13298 - 13305

Опубликована: Авг. 28, 2023

Aqueous zinc-ion batteries possess enormous application prospects in energy storage devices due to their abundant zinc resources and intrinsic safety characteristics. However, there are still many significant challenges developing suitable cathode materials that match with the anodes. In this work, we design carbon-coated V2O5 microspheres by a chitosan-assisted route. The amorphous carbon layer can efficiently enhance electrical conductivity of active materials, thereby improving electrochemical performance. as-assembled Zn/[email protected] achieve specific capacity 532.4 mAh g–1 at 0.2 A an density 354.9 Wh kg–1. They show long-term cycling stability retention rate 86% after 3000 cycles 5 g–1.

Язык: Английский

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The synthesis and application of crystalline–amorphous hybrid materials

Chemical Society Reviews, Год журнала: 2023, Номер 53(2), С. 684 - 713

Опубликована: Дек. 20, 2023

Crystalline-amorphous hybrid materials (CA-HMs) possess the merits of both pure crystalline and amorphous phases. Abundant dangling bonds, unsaturated coordination atoms, isotropic structural features in phase, as well relatively high electronic conductivity thermodynamic stability phase simultaneously take effect CA-HMs. Furthermore, atomic bandgap mismatch at CA-HM interface can introduce more defects extra active sites, reservoirs for promoted catalytic electrochemical performance, induce built-in electric field facile charge carrier transport. Motivated by these intriguing features, herein, we provide a comprehensive overview CA-HMs on various aspects-from synthetic methods to multiple applications. Typical characteristics are discussed beginning, followed representative strategies CA-HMs, including hydrothermal/solvothermal methods, deposition techniques, thermal adjustment, templating methods. Diverse applications such electrocatalysis, batteries, supercapacitors, mechanics, optoelectronics, thermoelectrics along with underlying structure-property mechanisms carefully elucidated. Finally, challenges perspectives proposed an aim insights into future development

Язык: Английский

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Facilitating the Electrochemical Oxidation of ZnS through Iodide Catalysis for Aqueous Zinc‐Sulfur Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(9)

Опубликована: Янв. 10, 2024

Aqueous zinc-sulfur (Zn-S) batteries show great potential for unlocking high energy and safety aqueous batteries. Yet, the sluggish kinetic poor redox reversibility of sulfur conversion reaction in solution challenge development Zn-S Here, we fabricate a high-performance battery using highly water-soluble ZnI

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(25)

Опубликована: Март 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

Язык: Английский

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Hydroxylated Manganese Oxide Cathode for Stable Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Май 1, 2024

Abstract Manganese (Mn) oxides are promising cathode materials for rechargeable aqueous Zn‐ion batteries. However, the Mn dissolution in weakly acidic electrolytes always hinders development of better Zn–Mn Herein, a hydroxylated manganese oxide material (H‐MnO 2 ) is fabricated using an electrochemical method stable batteries without relying on 2+ electrolyte additives. The partial hydroxylation leads to charge redistribution material, changing reaction thermodynamics and kinetics. Theoretical simulation suggests that promotes both Zn adsorption diffusion kinetics surface H‐MnO but weakens interaction between H + electrode. Therefore, ions can be more reactive with than ions. Experimental results show insertion mechanism dominates storage process 2, ‐induced effectively alleviated. Importantly, exhibits good cycling stability 95% capacity retention over 5000 cycles at current density 3.8 A g −1 ZnSO 4 electrolyte, outperforming state‐of‐the‐art batteries, even those findings provide new insights designing cathodes

Язык: Английский

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Robust P-Se bond coupling of atomically amorphous W-P clusters to crystalline WSe2 via dual p-band centers for enhanced sodium-ion storage

Energy storage materials, Год журнала: 2024, Номер 67, С. 103265 - 103265

Опубликована: Фев. 15, 2024

Язык: Английский

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Single‐Atomic‐Site Platinum Steers Middle Hydroxyl Selective Oxidation on Amorphous/Crystalline Homojunction for Photoelectrochemical Glycerol Oxidation Coupled with Hydrogen Generation

Advanced Functional Materials, Год журнала: 2024, Номер 34(26)

Опубликована: Фев. 28, 2024

Abstract Photoelectrochemical (PEC) organic conversion is a promising approach to convert low‐cost organics value‐added chemicals, which urgently needs the development of efficient and highly selective photoanodes. Here, Pt single‐atom dispersed WO 3 amorphous/crystalline homojunction for anodic glycerol oxidation reaction (GOR) coupled with cathodic hydrogen generation reported. In photoelectrocatalytic system, novel Pt‐SA/WO x photoanode reaches photocurrent density 2.85 mA cm −2 at 1.2 V versus RHE, up 297.3 mmol m h −1 rate 60.2% dihydroxyacetone (DHA) selectivity, realizing green synthesis high‐value chemicals. The experimental data theoretical calculations reveal regulated band structure, build‐in electric field, surface charge , can improve carrier lifetime, accelerate transfer, reduce energy barrier GOR process, thus boosting PEC activity DHA selectivity. This work provides feasible plan designing atomic‐level engineering constructing on photoanodes products from biomass.

Язык: Английский

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