Hierarchically Porous and Hetero‐Structured Black Phosphorus/Ti₃C₂T_X MXene Aerogel Fiber for Wearable Supercapacitors with Implantable Capability

Advanced Functional Materials, Год журнала: 2024, Номер 34(51)

Опубликована: Авг. 22, 2024

Abstract Architected fibrous electrodes with hierarchically porous, stable interface coupling, and good biocompatibility that accelerates charge transfer storage are vital to realize high‐performance fiber‐shaped supercapacitors (FSCs) toward wearable implantable systems. Here, a porous hetero‐structured black phosphorus/Ti 3 C 2 T X MXene aerogel (A‐BP/Ti ) fiber based on electrostatic self‐assembly microfluidic spinning methods is reported. The as‐prepared A‐BP/Ti interconnected networks, high conductive skeleton, substantial interfacial building exhibits low diffusion energy barrier of H + , the large adsorption fast electron conduction, excellent structural stability by density functional theory calculations in situ/ex situ characteristics. As result, presents boosted electrolyte ion kinetic capacitance 369 F g −1 . Furthermore, asymmetric FSCs deliver 6.39 Wh kg long cycling 20 000 cycles, thereby successfully powering devices. More importantly, combining hydrogel adhesion agent, can firmly adhere tissues show significant bending (88.52% retention after 5000 cycles), impressively adhesive capability tissue fluid or wetted surface, considerably no cell toxic. work offers broad path for designing technology applications.

Язык: Английский

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Trimetallic Atom‐Doped Functional Carbon Catalyst Enables Fast Redox Kinetics and Durable Cyclic Stability of Zinc‐Iodine Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 15, 2024

Abstract Active iodine dissolution and polyiodide shuttle are two major obstacles hindering the application of zinc‐iodine batteries (ZIBs). Designing functional carriers with strong physisorption/chemisorption capability, abundant active sites, high catalytic activity for redox reaction kinetics, is considered an effective strategy to solve current problems ZIBs. In this work, Fe, Co, Ni‐doping porous carbon (FeCoNi) comprehensively investigated as carrier material prepare iodine‐loading cathode FeCoNi@I 2 . On basis experimental tests theoretical calculations, introduction FeCoNi trimetallic atoms effectively regulates electronic structure, charge distribution, conductivity substrate, promoting conversion kinetics well chemisorption capability species, which conducive inhibit dissolution. As expected, Zn//FeCoNi@I exhibit specific capacity self‐discharge resistance reversible stabilizes at 108.8 mAh g −1 after 13000 cycles 1 A , 94.7 14000 3 This work will open new horizons structural design catalyst‐type materials durable ZIBs, facilitate atom‐doped in high‐performance secondary batteries.

Язык: Английский

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Mesoporous dominated porous carbon with high nitrogen and phosphorus doping levels toward high area capacity zinc-iodine batteries

Journal of Energy Storage, Год журнала: 2025, Номер 120, С. 116495 - 116495

Опубликована: Апрель 6, 2025

Язык: Английский

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General Oxygen Vacancy Engineering by Molten Zinc to Regulate Anode Redox for Durable Aqueous Zinc–Iodine Batteries

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 12, 2025

Oxygen vacancy engineering plays a crucial role in regulating surface chemistry for managing redox behaviors. However, controllable implantation of oxygen and safe cost-effective production remain challenging. Herein, we report general molten zinc reduction technology to prepare oxygen-deficient oxides with tunable content, synthetic universality, industrial compatibility under mildly elevated temperature. Taking TiO2 as an example, theoretical study demonstrates thermodynamically favorable affinity on increasing coverage supporting Zn supply. Featuring electronic structures inferior hydrogen evolution activity, TiO2-x nanoparticles were used decorate aqueous anodes, which demonstrate much improved cycling stability, verified by situ ex investigations. Eventually, zinc-iodine batteries assembled using modified achieved performance due the regulated anode alleviated self-discharge This work provides in-depth understanding durable related systems.

Язык: Английский

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Nano/Micro Metal‐Organic Framework‐Derived Porous Carbon with Rich Nitrogen Sites as Efficient Iodine Hosts for Aqueous Zinc‐Iodine Batteries

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Nowadays, the low cost, superior safety, and long durability of aqueous zinc-iodine (Zn-I2) batteries have garnered significant interest. Nevertheless, their practical use is limited by inferior conductivity iodine shuttle effect, resulting in suboptimal electrochemical behavior. In this work, a nano/micro zinc-based metal-organic framework (Zn-MOF) featuring cubic morphology employed for obtaining porous nitrogen-doped carbon (NC), which reported as cathode host Zn-I2 batteries. Thanks to its architecture high NC, optimized S3-1000 material achieves loading enables rapid electron/ion transport. More importantly, adsorption experiments combined with density functional theory (DFT) calculations reveal that graphitic-N pyridine-N moieties within matrix synergistically serve active anchoring sites species, suppress polyiodide effects accelerate redox kinetics during conversion. As result, I2@S3-1000 highest specific capacity cycle stability over 10,000 cycles, while in-situ characterization analysis confirms reversible mechanism. Soft pack battery prototype flexible micro-battery based on are also fabricated show excellent flexibility. This study promotes development MOF-derived cathodes advanced

Язык: Английский

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Boosting Iodine Redox Kinetics by Nickel‐Cobalt Diatomic Electrocatalyst for Zinc‐Iodine Batteries

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Single‐atom catalysts (SACs) offer an efficient solution of a well‐defined structure‐activity relationship for boosting iodine redox kinetics and suppressing the shuttle effect in zinc‐iodine (Zn‐I 2 ) batteries, but further upgradation their electrocatalytic activity is still constrained to date. Herein, atomically dispersed transition‐metal electrocatalysts comprised heteronuclear nickel‐cobalt diatomic sites anchored on porous carbon nanosheets (Ni‐Co‐DA/PCNs) are proposed by novel interlayer‐confinement pyrolysis strategy. Thereinto, NiCoAl‐layered double hydroxides employed as 2D topological structure induce confined polycondensation aromatic hydrocarbon precursors, ions simultaneously trapped hierarchical frameworks oxygen‐containing species. The detailed experimental investigations combined with situ Raman spectroscopy reveal that Ni‐Co‐DA/PCNs electrocatalyst M‐O 4 pair high specific surface area capable facilitating adsorption fast conversion polyiodides, thereby accelerating I /I ‒ protecting zinc anode. Consequently, assembled Zn‐I batteries Ni‐Co‐DA/PCNs/I cathode exhibit discharge capacity 216.7 mAh g ‒1 at 0.2 A excellent rate capability ultralong cycling lifespan over 9000 cycles decay only 0.0018% per cycle, which far superior those Ni/Co SACs. This work provides new insight into design dual‐atom Zn‐halogens batteries.

Язык: Английский

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The Frontiers of Aqueous Zinc–Iodine Batteries: A Comprehensive Review on Mechanisms, Optimization, and Industrial Prospects

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

Abstract Zinc–iodine batteries, grounded in halogen‐powered static conversion mechanisms, are experiencing significant development. However, clarity regarding their industrialization pathway remains elusive. This review delves into the energy storage mechanism of zinc–iodine encompassing not only conventional low‐valence transformation but also spotlighting emerging high‐valence mechanisms. Simultaneously, several optimization routes proposed from perspective battery industrialization, mainly covering direction cathode and anode materials, including efficient restraints iodine effect behavior, promotion reaction, effective design zinc anode. Furthermore, starting promoting practical application, path designing prototypes functionalized devices, focusing on device development, while improving relevant strategies for cost‐effective use explored. Additionally, considering future demand industry, discussion extends batteries to encompass extreme temperature conditions, derivative product designs, interdisciplinary integration. With a focus this work identifies key challenges field proposes comprehensive strategies, aiming provide guidance high‐performance, applications.

Язык: Английский

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High yield porous carbon framework with co-active B N sites to promote polyiodide conversion for high performance Zn-I2 batteries

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 138070 - 138070

Опубликована: Июнь 1, 2025

Язык: Английский

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Fabrication of Phthalocyanine Polymers with Abundant Nitrogen Active Sites as the Cathode Materials for Aqueous Zinc-Organic Batteries

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(20), С. 12823 - 12831

Опубликована: Окт. 9, 2024

Phthalocyanine (Pc), a macrocyclic aromatic compound, has attracted extensive attention in energy storage due to its large π-conjugated structure and abundant nitrogen sites. However, the poor solubility of Pc monomers leads rigorous polymerization conditions, which hinder application development Pc-based polymers. Herein, 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HAT(CN)6) is used as precursor construct conjugated polymers (Pc-COPs) via molten salt assisted strategy. The physical–chemical properties resulting Pc-COPs at different synthesis temperatures were systematically studied, indicates that Pc-COP-350 (at temperature 350 °C) exhibits complete while maintaining redox activity active centers. As cathode material for aqueous zinc-ion batteries, exhibited best electrochemical performance, achieving specific capacity 269 mA h g–1 0.05 A g–1. Coulombic efficiency up nearly 100% even after long cycles current density 1 This work provides pathway designing synthesizing compounds.

Язык: Английский

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A universal route to graft highly dispersed Cobalt Phthalocyanine on porous carbon for efficient CO2 Electroreduction

New Journal of Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

A promising catalyst for dispersing CoPc on three-dimensional porous carbon was prepared and showed impressive performance CO 2 electroreduction to CO.

Язык: Английский

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