In Situ Fabricated Poly(1,8‐naphthalenediamine)/Active Carbon Composite Cathodes for Aqueous Zinc‐Ion Batteries with High Active Sites Utilization and Ultralong Life Span of 50 000 Cycles

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

Published: June 14, 2024

Abstract Polymers with redox activity are one type of promising candidates cathode materials for aqueous Zn‐ion batteries due to their potential low‐cost, high safe, and renewable features. Unfortunately, suboptimal polymer electrode structure often results in unsatisfactory electrochemical performance. Herein, poly(1,8‐diaminonaphthalene)/active carbon composite electrodes prepared via nanoconfined situ electropolymerization within porous active carbon, which have ultrahigh specific surface area (1035.0 m 2 g −1 ) unique nano‐porous structure, thereby highly enhancing the utilization site up 91.6%. The as‐prepared cathodes deliver reversible capacity 479.5 mAh , ultrafast rate capability 60 A an ultralong life span 50,000 cycles. Storage mechanism investigation indicates that material involves a bipolar‐type behavior. These encouraging demonstrate is brand‐new strategy design advanced high‐performance Zn‐organic batteries.

Language: Английский

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In Situ Formation of Coordinated Polymer via Organic–Inorganic Hybridization Engineering Boosting High‐Efficiency Potassium Storage

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: Aug. 2, 2023

Abstract Organic redox‐active molecules with merits of structure diversity and tunable properties are emerging as promising cathodes for the practical usage potassium‐ion batteries (PIBs). However, inferior cycle stability sluggish charge‐carrier mobility two main drawbacks hindering application organic cathode materials. Herein, highly conductive inorganic CuS is combined small molecule‐based redox species (perylene‐3,4,9,10‐tetracarboxylic dianhydride, PTCDA) to form a novel organic–inorganic hybrid (PTCDA/CuS) PIBs, which could undergo electrochemical‐induced in situ self‐transformation sulfur‐linked Cu 2+ ‐coordinated PTCDA polymer (labeled Cu@PTCDA‐SP). Benefiting from improved sites activated carbonyl groups, high afforded by sulfur‐bridging, isotropic amorphous nature, 3D cross‐linked nanosheet morphologies, resulting Cu@PTCDA‐SP exhibits high‐rate capacity involving trielectron enolization (vs 2‐electron transformation monomers) long‐term life (over 2800 cycles at 5 A g −1 ). This hybridized very PIBs. Additionally, strategy provides new insight into discovery more electrochemically induced interaction between hybrids toward high‐performance secondary batteries.

Language: Английский

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Unlocking high-performance organic cathodes: tailoring active group densities in covalent frameworks for aqueous zinc ion batteries

Energy Materials and Devices, Journal Year: 2023, Volume and Issue: 1(1), P. 9370007 - 9370007

Published: Sept. 1, 2023

Aqueous zinc ion batteries (AZIBs) are a promising energy storage technology due to their cost-effectiveness and safety. Nowadays, organic materials with sustainable designable structures of great interest as AZIB cathodes. However, small molecules in cathode face dissolution problems suboptimal cycle life, while large suffer from low theoretical capacity inert carbon skeletons. Here, we designed two covalent framework (BB-COF TB-COF) the same structure number groups investigate correlation between densities active sites electrochemical performance. Our study concludes that behavior conjugates-based doesn't exhibit linear quantity. Adjusting is crucial for material advancement. BB-COF TB-COF, dual (C=O C=N), distinct characteristics. denser groups, shows higher initial (222 mAh g^-1). Conversely, BB-COF, featuring larger conjugated ring diameter, exhibits superior rate performance enduring stability. It even maintains stable cycling 2,000 cycles at -40 ℃. More deeply, in-situ quartz crystal microbalance (EQCM) reveals mechanism storing H⁺ first then Zn²⁺.

Language: Английский

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Challenges and Opportunities for Proton Batteries: From Electrodes, Electrolytes to Full‐Cell Applications

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: Aug. 9, 2024

Abstract Proton batteries have emerged as a promising solution for grid‐scale energy storage benefiting their high safety and abundant raw materials. The battery chemistry based on proton‐ions is intrinsically advantageous in integrating fast diffusion kinetics capacities, thus offering great potential to break through the limit of capacitors power traditional batteries. Significant efforts been dedicated advancing proton batteries, leading successive milestones recent years. Herein, progress summarized insights into challenges electrodes, electrolytes future opportunities enhancing full‐cell applications are provided. fundamentals electrochemical representative faradaic electrodes discussed, delving current limitations mechanism studies performances. Subsequently, classification, challenges, strategies improving protonic addressed. Finally, state‐of‐the‐art full‐cells explored, views rational design devices achieving high‐performance aqueous offered.

Language: Английский

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The role of glass fiber separators on the cycling of zinc metal anodes

Journal of Membrane Science, Journal Year: 2023, Volume and Issue: 688, P. 122130 - 122130

Published: Oct. 3, 2023

Language: Английский

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