Designing a solubility-limited small organic molecule for aqueous zinc-organic batteries

Sun, Taolei; Zhang, Weijia; Zha, Zhengtai; Cheng, Min; Li, Diantao; Tao, Zhanliang

doi:10.1016/j.ensm.2023.102778

Cited by 35 publications

(23 citation statements)

References 40 publications

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“…Specifically, the distribution of the lowest unoccupied molecular orbital (LUMO) plays a vital role in determining the electrochemical properties. In addition, polymers with a narrow band gap typically have increased electrical conductivity. , Figure a illustrates the molecular electrostatic surface potential (MESP) of DAQ, BA, and a unit of construction for PDAQ. The nearby red-shaded area, which corresponds to the CO group, is most of the redox active sites with increased electronegativity in PDAQ polymers.…”

Section: Resultsmentioning

confidence: 99%

Quinone-Enriched Polymer with a Large π-Conjugated Structure for High-Energy Supercapacitors: Synthesis and Electrochemical Assessment

Zhou,

Wei,

Xiao

et al. 2024

Energy Fuels

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Organic synthesis strategies can be used to form particular functional groups and skeleton structures of electrochemically active organic molecules with a reversible faradaic charge transfer suitable for high-efficiency energy storage. In this work, an organic molecular electrode (OME) is assembled by a unique combination of quinone-enriched polymers (PDAQs) with reduced graphene oxides (rGOs) for supercapacitors. Using 1,3,5-benzenetricarboxaldehyde (BA) as a bridge, electrochemically active 2,6-diaminoanthraquinone (DAQ) is connected in an imine linkage to create a novel polymer (PDAQ) with a unique structure. Excellent electrochemical characteristics are achieved as a result of an extensive π-conjugation system and high density of C� O in the structural unit of the PDAQ, while robust π−π interactions between PDAQ and rGO improve cycling stability. PDAQ/rGO-0.3 exhibits an impressive specific capacitance up to 622 F g −1 at 5 mV s −1 with exceptional capacitance retentions (87.8% at 100 mV s −1 ) and a long cycle life. To validate the practical energy storage capability of PDAQ/rGO-0.3, an asymmetric supercapacitor (ASC) was constructed utilizing 2,5-dihydroxy-1,4-benzoquinonefunctionalized rGO (DBQ/rGO) as the positive electrode. The assembled ASC (PDAQ/rGO-0.3//DBQ/rGO) exhibits a remarkable energy density of 32.97 Wh kg −1 at a power density of 605.57 W kg −1 and maintains 88% after undergoing 10 000 cycles. The two ASCs were arranged in tandem configuration, effectively powering up to 63 light-emitting diodes (LEDs), demonstrating their prospective potential for energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Quinone-Enriched Polymer with a Large π-Conjugated Structure for High-Energy Supercapacitors: Synthesis and Electrochemical Assessment

Zhou,

Wei,

Xiao

et al. 2024

Energy Fuels

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“…Notably, the lowest unoccupied molecular orbital (LUMO) energy level of PD/rGO is lower than that of PQ/rGO (À 2.86 eV vs. À 2.58 eV), indicating a greater electron affinity and higher reduction potential for PD/rGO. [38] Furthermore, the energy gap between the LUMO and the highest occupied molecular orbital (HOMO) of PD/rGO is lower than that of PQ/rGO, suggesting a higher conductivity for PD/rGO (1.96 eV vs. 2.22 eV). [39] Characterizations of the positive electrode material (PD/rGOs)…”

Section: Resultsmentioning

confidence: 99%

Asymmetric Supercapacitors based on 1,10‐phenanthroline‐5,6‐dione Molecular Electrodes Paired with MXene

Wei,

Meng,

Xiao

et al. 2023

ChemSusChem

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An efficient approach to increase the energy density of supercapacitors is to prepare electrode materials with larger specific capacitance and increase the potential difference between the positive and negative electrodes in the device. Herein, an organic molecular electrode (OME) is prepared by anchoring 1,10‐phenanthroline‐5,6‐dione (PD), which possesses two pyridine rings and an electron‐deficient conjugated system, onto reduced graphene oxide (rGO). Because of the electron‐deficient conjugated structure of PD molecule, PD/rGOs exhibit a more positive redox peak potential along with the advantages of high capacitance‐controlled behaviour and fast reaction kinetics. Additionally, the small energy gap between the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) leads to increased conductivity in PD/rGO. To assemble the asymmetric supercapacitor (ASC), a two‐dimensional metal carbide, as known as MXene, with a chemical composition of Ti3C2Tx is selected as the negative electrode due to its exceptional performance, and PD/rGO‐0.5 is employed as the positive electrode. Consequently, the working voltage is expanded up to 1.8 V. Through further electrochemical measurements, the assembled ASC (PD/rGO‐0.5//Ti3C2Tx) achieves a remarkable energy density of 36.8 Wh kg‐1. Remarkably, connecting two ASCs in series can power 73 LEDs, showcasing its promising potential for energy storage applications.

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Section: Categories Of Organic Cathode Materialsmentioning

confidence: 99%

“…Additionally, their relatively high solubility can result in the shuttling of active materials in electrolytes and capacity fading. [25] Therefore, selecting an appropriate structural design is crucial to improve the electrochemical performance of quinone compounds. [38] In this section, we will discuss several existing methods for modifying quinone compounds.…”

Section: Carbonyl Compoundsmentioning

confidence: 99%

“…are well compatible with many carriers. [25] Furthermore, some organic materials are flexible and processable, and do not undergo crystalline structural changes during electrochemical reactions, making them appealing to flexible or thin batteries, or even all-organic batteries. There are numerous uses for organic compounds in batteries, including as binders, electrode materials, electrolyte additives, membrane separators, and other parts.…”

Section: Introductionmentioning

confidence: 99%

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Pivotal Role of Organic Materials in Aqueous Zinc‐Based Batteries: Regulating Cathode, Anode, Electrolyte, and Separator

Chen,

2023

Adv Funct Materials

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Aqueous zinc‐based batteries have garnered considerable interest as promising energy storage devices due to the low cost, remarkable energy density, high safety, and eco‐friendliness. However, the mutual challenges of cathode dissolution, electrolyte parasitic reactions, disordered zinc dendrite growth, and easily punctured separator have significantly impeded the widespread commercialization of aqueous zinc‐based batteries. Realizing high‐performance zinc‐based batteries becomes imperative yet remains extremely challenging. To address these concerns, great efforts have recently been made to design high‐performance zinc‐based batteries. Here the state‐of‐the‐art in organic materials is critically reviewed for aqueous zinc‐based batteries, covering main components of a battery. This review provides a comprehensive overview on the design strategies of organic materials for zinc‐based batteries, encompassing cathode, anode, electrolyte, and separator. Furthermore, the challenges and prospective research directions are also discussed to provide a guideline for further development of highly stable zinc‐based batteries.

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Designing a solubility-limited small organic molecule for aqueous zinc-organic batteries

Cited by 35 publications

References 40 publications

Quinone-Enriched Polymer with a Large π-Conjugated Structure for High-Energy Supercapacitors: Synthesis and Electrochemical Assessment

Quinone-Enriched Polymer with a Large π-Conjugated Structure for High-Energy Supercapacitors: Synthesis and Electrochemical Assessment

Asymmetric Supercapacitors based on 1,10‐phenanthroline‐5,6‐dione Molecular Electrodes Paired with MXene

Pivotal Role of Organic Materials in Aqueous Zinc‐Based Batteries: Regulating Cathode, Anode, Electrolyte, and Separator

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