Se Vacancy Activated Bi₂Se₃ Nanodots Encapsulated in Porous Carbon Nanofibers for Aqueous Zinc and Ammonium Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: Aug. 19, 2024

Abstract Bismuth‐based materials show great potential in aqueous batteries. But it is difficult to design a bifunctional bismuth‐based material for zinc and ammonium ion batteries (ZIBs AIBs). Herein, electrospinning method followed by selenization strategy used Bi 2 Se 3 nanodots embedded porous carbon nanofibers. Experimental studies coupled with theoretical calculations prove that the designs of nanodot vacancy improve transfer storage Zn 2+ NH 4 + . are restricted nanofibers during cyclic test. An insertion‐type mechanism revealed ex situ characterizations. As result, this well‐designed electrode (6 mg cm −2 ) offers high reversible capacities 270 mA h g −1 ZIBs 192 AIBs at 0.05 A long‐term cycle life (60% capacity retention 10 after 20 K cycles ZIBs, 78% 9 Remarkably, still displays satisfactory performances even an ultrahigh mass loading 18 Furthermore, full cells offer 120 90 respectively. This work provides reference designing electrode.

Language: Английский

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Synergistic Effects of Confinement Structure and Local‐Expanded Interlayer Spacing in Fe₂Mo₃O₈@C@MoS₂ Toward High‐Efficient Sodium Ion Storage

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 22, 2024

Abstract Developing multicomponent composite materials with delicate morphology and tailored structure is of vital importance for designing advanced sodium‐ion batteries (SIBs). Herein, a confinement‐structured Fe 2 Mo 3 O 8 @C@MoS local‐expanded interlayer spacing designed via high‐temperature phase transition from FeMoO 4 to the tactically introducing dopamine molecules into MoS nanosheets. By analysis in situ generated solid electrolyte interphase film different electrolytes, favorable compatibility ether‐based electrolytes well illustrated. Importantly, sodium storage mechanism detailed structural evolution are established first time by X‐ray diffraction. Furthermore, theoretical calculations indicate unique facilitates internal charge transfer enhances Na + adsorption ability. Thanks confinement structure, interlayers robust framework, achieves high reversible specific capacity 636 mAh g ‒1 at 0.1 A , excellent rate capability (301 5.0 ) ultralong cycling stability (365 –1 after 6000 cycles 2.0 ). The study provides an essential understanding promising strategy constructing high‐performance anodes SIBs.

Language: Английский

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Defect engineering induced nanostructure changes of NiMo-layered double hydroxides/MOF heterostructure on battery type charge storage

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 639, P. 236685 - 236685

Published: March 4, 2025

Language: Английский

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Simultaneously Improving Energy Storage and Oxygen Evolution Reaction by Causing Regional Defects in MOF-on-MOF Derived Hollow Se-Doped CoP-Fe₂P Heterojunctions

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(32), P. 42230 - 42241

Published: July 31, 2024

Doping heteroatoms into metal phosphides to modify their electronic structure is an effective method, but the incomplete exposure of active sites its inherent drawback. In this experiment, both Se doping and P vacancies are simultaneously introduced CoP-Fe2P (named CoFe-P-Se) enhance internal reactivity. Benefiting from unique hollow porous derived MOF-on-MOF template, as well enhanced intrinsic activity achieved by defects doping, CoFe-P-Se exhibits a high specific capacitance 8.41 F cm–2 at current density 2 mA when used supercapacitor electrode. When assembled hybrid with activated carbon, energy reaches 0.488 mWh power 1.534 mW cm–2, capacity retention after 5000 charge–discharge cycles 90.65%. As oxygen evolution reaction (OER) electrode, electrode shows low overpotential only 230 mV 10 278 100 cm–2. Additionally, it excellent stability for over 50 h The designed element vacancy engineering in work will provide insight constructing high-performance electrodes.

Language: Английский

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Flake-like 2D/3D CoNiMn-layered triple hydroxide/Ni nanoarrays derived from hydrogen bubble and leaf-like Co-ZIF-L templates for flexible asymmetric fiber micro-supercapacitor

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 109, P. 115248 - 115248

Published: Jan. 5, 2025

Language: Английский

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Research progress in metal-organic frameworks and their derivatives in electrochemistry

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

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Molecular Evolution of Target Organosulfur Enables High-Performance Aqueous Zinc Batteries

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Organic cathode materials for aqueous zinc-ion batteries (AZIBs) have garnered significant attention due to their environmental friendliness and structurally customizable nature. However, the low voltage, sluggish redox kinetics, high solubility of most n-type hinder wide deployment. To overcome these challenges, through molecular evolution, we rationally select a cheap industrial material, organodisulfide 2,2'-dithiobis (benzothiazole) (MBTS), as an material AZIBs. Due presence N-containing benzothiazole rings, dissociation energy sulfur-sulfur (S-S) bond is reduced, substantially enhancing discharge voltage improving reaction kinetics. They regulate π-conjugated plane achieve fast charge transfer. Moreover, density functional theory (DFT) calculations elucidate synergistic effect between adjacent active sites Zn2+ storage reactions, revealing that formation weak coordination bonds N Zn atoms (N-Zn-S bond) reduces product. Molecular evolution has led kinetics zinc ion storage, thus achieving performance under mass loading. At current 0.05 A g-1, MBTS exhibits average 1.02 V, with mere overpotential 100 mV, delivers specific capacity 153.6 mAh g-1. The assembled pouch cell demonstrates excellent rate capability 124.4 g-1 at 1 displays stable cycle life after 200 cycles 96.8% retention. Remarkably, maintains favorable stability various ultrahigh loadings, up 18.2 mg cm-2. findings provide substantial guidance practical applications organic electrode in

Language: Английский

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Solvothermally synthesized MnO2@Zn/Ni-MOF as high-performance supercapacitor electrode material

Ionics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Language: Английский

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CoNiSe₂ Nanoparticles Embedded in Pod‐Like N‐Doped Carbon Nanofibers for High‐Performance Sodium‐Ion Batteries

Energy Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Sluggish kinetics and severe volume expansion critically limit the electrochemical performance of sodium‐ion batteries (SIBs). Herein, a novel material combining CoNiSe 2 nanoparticles with pod‐like N‐doped carbon nanofibers (CoNiSe /PCNFs) is designed fabricated. The bimetallic selenide combines redox characteristics Co Ni, which offers more active sites for Na + adsorption. nanocubes show large surface areas, contribute to faster diffusion kinetics. Unique not only serve as reinforcing frameworks inhibit change but also improve conductivity /PCNFs. /PCNFs electrode achieves high capacity 395.8 mAh g −1 at current density 0.1 A after 100 cycles exhibits excellent cycling stability 1000 1.0 284.3 . structure properties shed new light on developing high‐performance selenides SIB anodes.

Language: Английский

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Boosting High Energy Density for Aqueous Ni–Zn Batteries by Synergetic Engineering of Bimetal Doping and Se Vacancy in Ni₃Se₂

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Language: Английский

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