Duodecuple H‐Bonded NH₄⁺ Storage in Multi‐Redox‐Site N‐Heterocyclic Cathode for Six‐Electron Zinc–Organic Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(45)

Опубликована: Май 28, 2024

Abstract Designing multiple redox sites in electroactive organic cathodes that allow more electron transfer is a permanent target for energy storage. Here, six‐electron zinc–organic batteries are reported accessed by duodecuple H‐bonded NH 4 + storage N‐heterocyclic dipyrazino[2,3‐f:2′,3′‐h]quinoxaline‐2,3,6,7,10,11‐hexacarbonitrile (DQH) cathode. DQH features an extended π‐conjugated aromatic planarity enriched with super delocalization routes and dodecahedral‐active imine/cyano motifs, achieving high capacity up to 385 mAh g −1 at 0.5 A . Besides, cathode redox‐exclusively couples small‐hydration‐size low‐desolvation‐energy‐barrier ions (0.33 nm 0.19 eV vs 0.86 0.36 of Zn 2+ ) via flexible H‐bonding interactions. topo‐coordination enables anti‐dissolution aqueous electrolytes avoid common decay small molecules, solves the instability low interfacial reaction kinetics issues caused rigidly sluggishly repeated insertion ions. This gives battery high‐rate ability (30 lifespan 000 cycles 10 ).

Язык: Английский

---

Multi‐N‐Heterocycle Donor‐Acceptor Conjugated Amphoteric Organic Superstructures for Superior Zinc Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 5, 2024

Abstract Multiple redox‐active amphoteric organics with more n‐p fused electron transfer is an ongoing pursuit for superior zinc–organic batteries (ZOBs). Here we report multi‐heterocycle‐site donor‐acceptor conjugated organic superstructures (AOSs) by integrating three‐electron‐accepting n‐type triazine motifs and dual‐electron‐donating p‐type piperazine units via H‐bonding π–π stacking. AOSs expose flower‐shaped N‐heteromacrocyclic delocalization topologies to promise full accessibility of built‐in ultralow activation energy, thus liberating capacity (465 mAh g −1 ) Zn||AOSs battery. More importantly, the extended multiple donor‐acceptor‐fused feature satisfied discharge voltage anti‐dissolution in electrolytes, pushing both energy density cycle life ZOBs a new level (412 Wh kg 70,000 cycles@10 A ). An anion–cation hybrid 18 e − charge storage mechanism rationalized heteromacrocyclic modules cathode, entailing six tert‐N coupling CF 3 SO ions at high potential twelve imine sites coordinating Zn 2+ low potential. These findings constitute major advance multielectron materials stand good starting point advanced ZOBs.

Язык: Английский

---

Carbonyl-enriched sulfide linked conjugated polymer as a cathode for aqueous zinc ion batteries

Journal of Energy Storage, Год журнала: 2025, Номер 112, С. 115512 - 115512

Опубликована: Янв. 23, 2025

Язык: Английский

---

Optimization strategies for high-performance aqueous zinc-sulfur batteries: challenges and future perspectives

Energy Materials, Год журнала: 2025, Номер 5(4)

Опубликована: Янв. 23, 2025

Aqueous zinc-sulfur batteries (AZSBs) have emerged as promising candidates for high-energy density, cost-effective, and environmentally sustainable energy storage systems. Despite their potential, several challenges hinder the realization of high-performance AZSBs, including sluggish reaction kinetics, disproportionation reactions ZnS in water, low conductivity volume expansion sulfur cathode, poor wetting properties, dendrite growth issues zinc anode. This review comprehensively summarizes optimization strategies overcoming these challenges. We discuss cathode modification approaches, such sulfur/carbon composites, sulfide catalytic matrices, which address while enhancing conversion kinetics. Additionally, electrolyte engineering strategies, use iodide-based additives co-solvent modifications, are examined effectiveness improving kinetics properties. advancements, AZSBs still face with long-cycle stability. Therefore, this proposes future perspectives development AZSBs. aim to provide valuable insights into sulfur-based materials advance achievement

Язык: Английский

---

Electron-Withdrawing Group Functionalized Anthraquinone Polymers for High-Performance Organic Zinc-Ion Batteries

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 30, 2025

Aqueous zinc ion batteries (AZIBs) stand out among various battery technologies for their advantages, including low cost, high safety, and green credentials. We chemically polymerized anthraquinone triphenylamine derivatives to prepare the π-conjugated polymers poly 2-((4-(diphenylamine)benzylidene)amino)anthracene-9,10-dione (PDAH) 2-((4-((4-bromophenyl)(phenyl)amino)benzylidene)amino)anthracene-9,10-dione (PDABr), as cathode materials AZIBs. The anthraquinone-based structure's charge storage capacity, coupled with strong transfer capability, enabled these electrode exhibit excellent electrochemical performance. Among them, electron-withdrawing group -introduced in PDABr induces a p-π interaction adjacent benzene ring, optimizing electron migration within battery. This enhancement improves material's stability activity, leading superior performance, especially rate cycle life, stability. Comparative experiments revealed that PDABr//Zn exhibited higher specific capacity (0.1 A g-1, 210.57 mA h g-1) than PDAH//Zn 145.7 g-1). At same current density, also showed better cycling (capacity retention of 93% after 6000 cycles at 5 Additionally, exceptional maintaining its upon returning initial density. By comparing physical properties PDABr//Zn, relationship between conjugation effect performance is elucidated. study provides strategy fine-tuned, molecular design organic materials, specifically aimed enhancing high-energy zinc-ion batteries.

Язык: Английский

---

Imide Polymers with Bipolar-Type Redox-Active Centers for High-Performance Aqueous Zinc Ion Battery Cathodes and Electrochromic Materials

International Journal of Molecular Sciences, Год журнала: 2025, Номер 26(8), С. 3838 - 3838

Опубликована: Апрель 18, 2025

Aqueous zinc-ion batteries (AZIBs) have attracted interest for their low cost and environmental friendliness. Two bipolar organic materials with different degrees of conjugation, pPMQT pNTQT, were rationally designed synthesized as cathode candidates AZIBs based on 4,4′-diaminotriphenylamine (TPA), 2,7-diaminoanthraquinone (AQ), two anhydrides. This molecular design features an increased conjugation electron cloud density, thereby improving charge transport kinetics, specific capacity, cycling stability. In comparison pPMQ pNTQ (n-type), pNTQT demonstrate better electrochemical characteristics. this work, shows outstanding performance. It exhibits initial capacity 349.79 mAh g−1 at 0.1 A retains a 190.25 (87.6%) after 5000 cycles 5 g−1. comparison, demonstrates only 207.55 g−1, its retention rate is 81.2%. At the same time, both polymer films attractive electrochromic (EC) properties, displaying reversible color transitions from yellow to dark blue in UV–visible spectrum. work lays foundation further development triphenylamine-based polyimide application electrochromism.

Язык: Английский

---

Oxygen vacancy H2V3O8 nanowires as high-capacity cathode materials for aqueous zinc-ion batteries

Ionics, Год журнала: 2024, Номер 30(9), С. 5279 - 5289

Опубликована: Июль 3, 2024

Язык: Английский

---

Novel Thermoplastic Polyurethanes Enable Biaxially Stretchable Conductor for Supercapacitors with High Areal Capacitance

Nano Letters, Год журнала: 2024, Номер unknown

Опубликована: Дек. 12, 2024

Stretchable supercapacitors are essential components in wearable electronics due to their low heat generation and seamless integration capabilities. Thermoplastic polyurethane elastomers, recognized for dynamic hydrogen-bonding structure, exhibit excellent stretchability, making them well-suited these applications. This study introduces fluorine-based interactions the hard segments of thermoplastic polyurethanes, resulting polyurethanes with a elastic modulus, high fracture strength, exceptional fatigue resistance, self-healing properties. By utilizing as binders meshed fabric scaffolds, we developed highly stretchable conductors. These conductors maintain resistance (∼26 ohms) under biaxial stretching stable bidirectional conductivity after 1600 cycles. The fabricated supercapacitor electrode, incorporating current collectors, polyurethane, MXene, achieves an ultrahigh areal specific capacitance 7200 mF cm

Язык: Английский

---

Reveal the Influence of Conductive Carbon on Sulfur Crystallization: Key to High-Performance Aqueous Zinc–Sulfur Batteries

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(22), С. 10230 - 10237

Опубликована: Ноя. 6, 2024

Aqueous zinc–sulfur batteries (AZSBs) are emerging as high-energy-density due to the high capacity of sulfur-based cathodes. However, sulfur suffers from poor conductivity and sluggish reaction kinetics. Therefore, conductive carbons were employed additives enhance hosts encapsulate sulfur, thereby improving kinetics cycle stability. This work reveals critical role carbon in crystallization its impact on AZSBs' performance. Amorphous with uniform distribution S@Ketjen black (S@KB), unlike crystallinity aggregation others, results best electrochemical performance, demonstrating higher capacity, enhanced kinetics, long-cycle

Язык: Английский

---

Photostability of Phenoxazine Derivatives

ChemPhysChem, Год журнала: 2024, Номер 25(21)

Опубликована: Июль 8, 2024

Abstract Phenoxazine is a commonly used molecular building block, for example in optoelectronic applications and pharmaceuticals. However, it highly susceptible to rapid photodegradation, especially halogenated solvents. In the present study, we identify degradation products both non‐halogenated solvents by UV/Vis absorption, NMR spectroscopy mass spectrometry. We also propose substitution strategy aimed at effectively suppressing high photoreactivity. Kinetic studies show that quantum yield of photodegradation φ differs factor more than 1000 between trisubstituted derivatives N‐substituted phenoxazine.

Язык: Английский

---