Templated Freeze‐Casting for Porous Organic Battery Electrodes with High‐Rate Capabilities

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Redox‐active polymer (RAP)‐based organic electrodes offer versatile energy storage solutions across various battery systems. However, effective dispersion of active materials with conductive additives remains challenging, limiting site accessibility and material utilization. This study introduces camphene (CAMP), a bio‐derived solvent, to fabricate porous through templated freeze casting. Compared conventional N‐methyl‐2‐pyrrolidone (NMP)‐cast electrodes, CAMP‐cast exhibit superior ion diffusion, lower charge transfer resistance, enhanced reaction kinetics three different RAPs. results in excellent rate capabilities significant capacity retention even at 20 A g −1 current density. At higher mass loadings (>1.0 mg cm − 2 ), achieve areal capacities ≈0.15 mAh 0.5 over 1000 cycles maintain more than 80% after 500 . These findings demonstrate CAMP's potential as an eco‐friendly alternative NMP for producing high‐performance offering sustainable approach advanced solutions.

Language: Английский

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Interfacial charge transfer dynamics in cerium metal-organic framework through non-covalent interactions with hydrogen-rich aqueous and nitrogen-rich ionic electrolytes for energy storage applications

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 119, P. 116382 - 116382

Published: March 29, 2025

Language: Английский

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Conjugated microporous polymers as promising alternatives to traditional electrodes in alkali metal ion batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 156578 - 156578

Published: Oct. 12, 2024

Language: Английский

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Studies of the Functionalized α-Hydroxy-p-Quinone Imine Derivatives Stabilized by Intramolecular Hydrogen Bond

Molecules, Journal Year: 2024, Volume and Issue: 29(7), P. 1613 - 1613

Published: April 3, 2024

In this work, reactions between 6,7-dichloropyrido[1,2-a]benzimidazole-8,9-diones with different benzohydrazides were studied. Nucleophilic substitution at C(6) was followed by isomerization and led to α-hydroxy-p-quinone imine derivatives. Synthesized compounds represent a combination of several structural motifs: benzimidazole core fused imine, which contains benzamide fragment. X-ray crystallography analysis revealed the formation dimers linked through OH···O interactions stabilization form strong intramolecular NH···N hydrogen bonds. The protonation/deprotonation processes investigated in solution using UV–Vis spectroscopy 1H NMR titration experiment. Additionally, electrochemical properties 6,7-dichloropyrido[1,2-a]benzimidazole-8,9-dione its derivative as cathode materials acidic neutral environments cyclic voltammetry measurements. Cathode material based on could act potentially effective active electrode aqueous electrolyte batteries; however, further optimization is required.

Language: Английский

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Studies of the Functionalized α-Hydroxy-p-Quinone Imine Derivatives Stabilized by Intramolecular Hydrogen Bond

Published: March 8, 2024

Reactions of quinones with compounds containing an amino group can produce a wide variety addition or substitution products that depend on reactivity both quinone and derivative. 6,7-Dichloropyrido[1,2-a]benzimidazole-8,9-diones undergo selective nucleophilic reaction different benzohydrazides α-hydroxy-p-quinone imine derivatives stabilized by strong intramolecular hydrogen bond were isolated. Synthesized represent combination several structural motifs: benzimidazole core fused which contains benzamido fragment. The protonation/deprotonation processes investigated in solution using UV-Vis spectroscopy 1H NMR titration experiment. X-ray crystallography analysis revealed set weak non-covalent interactions such as intra- intermolecular bonds π-π stacking. Additionally, the redox behavior 6,7-dichloropyrido[1,2-a]benzimidazole-8,9-dione its p-imino derivative was acidic neutral environment cyclic voltammetry measurements. Cathode material based could act potential effective active electrode aqueous electrolyte batteries, however further optimization is required.

Language: Английский

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Polymer Connectivity Governs Electrophotocatalytic Activity in the Solid State

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

The reductive functionalization of inert substrates like chloroarenes is a critical yet challenging transformation relevant to both environmental remediation and organic synthesis. Combining electricity light an emerging approach access the deeply reducing potentials required for single electron transfer chloroarenes, this held back by poor stability mechanistic ambiguity current homogeneous systems. Incorporating redox-active moieties into insoluble materials represents promising strategy unlock new heterogeneous catalytic activity while improving catalyst stability. Herein, we demonstrate first example electrophotocatalysis using rylene diimide polymers reduction chloroarenes. In particular, find that electrophotocatalytic varies significantly not just as function but also redox-inactive polymer backbone. PTCDA-en, flexible, non-conjugated perylenediimide polymer, outperforms all other tested electrophotocatalyst. Using transient absorption spectroscopy, reveal precomplexation between closed-shell PTCDA-en2- haloarene substrate key productive catalysis. Overall, our work material provides insights how structure dictates in solid state, guiding development next-generation (electro)photocatalysts sustainable

Language: Английский

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Modeling Supercapacitors with the Simplified Randles Circuit: Analyzing Electrochemical Behavior through Cyclic Voltammetry and Galvanostatic Charge-Discharge

Electrochimica Acta, Journal Year: 2024, Volume and Issue: unknown, P. 145552 - 145552

Published: Dec. 1, 2024

Language: Английский

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