MoS₂@Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Advanced Materials, Год журнала: 2023, Номер 35(39)

Опубликована: Июнь 26, 2023

Ammonium-ion aqueous supercapacitors are raising notable attention owing to their cost, safety, and environmental advantages, but the development of optimized electrode materials for ammonium-ion storage still lacks behind expectations. To overcome current challenges, here, a sulfide-based composite based on MoS2 polyaniline (MoS2 @PANI) is proposed as an host. The possesses specific capacitances above 450 F g-1 at 1 A , 86.3% capacitance retention after 5000 cycles in three-electrode configuration. PANI not only contributes electrochemical performance also plays key role defining final architecture. Symmetric assembled with such electrodes display energy densities 60 Wh kg-1 power density 725 W . Compared Li+ K+ ions, surface capacitive contribution NH4+ -based devices lower every scan rate, which points effective generation/breaking H-bonds mechanism controlling rate insertion/de-insertion. This result supported by functional theory calculations, show that sulfur vacancies effectively enhance adsorption improve electrical conductivity whole composite. Overall, this work demonstrates great potential engineering optimizing insertion electrodes.

Язык: Английский

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Modulating NH4+ in vanadium oxide framework for high-efficient aqueous NH4+ storage

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151119 - 151119

Опубликована: Апрель 12, 2024

Язык: Английский

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One-step hydrothermal synthesis of vanadium dioxide/carbon core–shell composite with improved ammonium ion storage for aqueous ammonium-ion battery

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 669, С. 2 - 13

Опубликована: Май 1, 2024

Язык: Английский

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An acetate electrolyte for enhanced pseudocapacitve capacity in aqueous ammonium ion batteries

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 2, 2024

Abstract Ammonium ion batteries are promising for energy storage with the merits of low cost, inherent security, environmental friendliness, and excellent electrochemical properties. Unfortunately, lack anode materials restricts their development. Herein, we utilized density functional theory calculations to explore V 2 CT x MXene as a working potential. demonstrates pseudocapacitive behavior ammonium storage, delivering high specific capacity 115.9 mAh g −1 at 1 A retention 100% after 5000 cycles 5 . In-situ quartz crystal microbalance measurement verifies two-step process this unique in acetate electrolyte. Theoretical simulation reveals reversible electron transfer reactions [NH 4 + (HAc) 3 ]···O coordination bonds, resulting superior capacity. The generality enhancement effect is also confirmed MoS -based ammonium-ion battery system. These findings open new door realizing on through enhancement, breaking limitations both Faradaic non-Faradaic storage.

Язык: Английский

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Organic iodine electrolyte starting triple I+ storage in In-based metal-organic frameworks for high-capacity aqueous Zn-I2 batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 484, С. 149535 - 149535

Опубликована: Фев. 13, 2024

Язык: Английский

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Imine-based conjugated polymer enables efficient removal of ammonium ion via capacitive deionization

Separation and Purification Technology, Год журнала: 2024, Номер 353, С. 128290 - 128290

Опубликована: Июнь 14, 2024

Язык: Английский

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Encapsulation of Prussian Blue Analogues with Conductive Polymers for High‐Performance Ammonium‐Ion Storage

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 21, 2024

Abstract Multivalent manganese‐based Prussian blue analogues (Mn‐PBA) possess multi‐electron transfer characteristics and exhibit unique properties for achieving high energy density in ammonium ion batteries (AIBs). However, the irreversible structural collapse sluggish ionic diffusion kinetics result inferior rate capability undesirable lifespan. Herein, guided by theoretical calculations, a series of ultrafine Mn‐PBA@ conductive polymers core–shell composites through an situ polymerization encapsulation strategy are synthesized to solve above existing issues Mn‐PBA. Among various designed (including poly‐pyrrole (ppy), polyaniline, poly(3,4‐ethylenedioxythiophene)) coated on Mn‐PBA, Mn‐PBA@ppy shows strongest adsorption ions highest manganese atom removal barrier. Acting as cathode AIBs, exhibits remarkable capacity 72 mAh g −1 , super‐stable discharge platform 0.81 V, excellent cycling stability 94% retention over 300 cycles (0.1 A ) with ultrahigh NH 4 + coefficient ≈1.38 × 10 −8 cm −2 s . This work offers polymer approach simultaneously enhance stability. More importantly, this organic/inorganic interfacial design can promote development materials rapid cyclic

Язык: Английский

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P-n junction built-in electric field and electrochemical in-situ intercalation enabled ultra-stable and high-energy ammonium-ion storage

Nano Energy, Год журнала: 2025, Номер unknown, С. 110764 - 110764

Опубликована: Фев. 1, 2025

Язык: Английский

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Zn3V3O8 nanorods with outstanding electrochemical kinetics as novel anode for aqueous ammonium-ion batteries

Rare Metals, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Язык: Английский

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2D Conjugated Metal–Organic Frameworks Embedded with Iodine for High‐Performance Ammonium‐Ion Hybrid Supercapacitors

Advanced Materials, Год журнала: 2023, Номер 35(41)

Опубликована: Авг. 23, 2023

Ammonium ions (NH4+ ) are emerging non-metallic charge carriers for advanced electrochemical energy storage devices, due to their low cost, elemental abundance, and environmental benignity. However, finding suitable electrode materials achieve rapid diffusion kinetics NH4+ remains a great challenge. Herein, 2D conjugated metal-organic framework (2D c-MOF) immobilizing iodine, as high-performance cathode material hybrid supercapacitors, is reported. Cu-HHB (HHB = hexahydroxybenzene) MOF embedded with iodine (Cu-HHB/I2 features excellent electrical conductivity, highly porous structure, rich accessible active sites of copper-bis(dihydroxy) (Cu─O4 iodide species, resulting in remarkable areal capacitance 111.7 mF cm-2 at 0.4 mA . Experimental results theoretical calculations indicate that the Cu─O4 species play critical role binding polyiodide suppressing its dissolution, well contributing large pseudocapacitance adsorbed iodide. In combination MXene anode, full supercapacitors deliver an density 31.5 mWh long-term cycling stability 89.5% retention after 10 000 cycles, superior those state-of-the-art supercapacitors. This study sheds light on design storage, enabling development novel devices.

Язык: Английский

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