An anthraquinone-based covalent organic framework for highly reversible aqueous zinc-ion battery cathodes

Li, Lihua; Yang, Haohao; Wang, Xin; Ma, Yinghu; Ou, Weizhi; Peng, Hui; Ma, Guofu

doi:10.1039/d3ta05892a

Cited by 6 publications

(5 citation statements)

References 65 publications

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“…into enol-type salt dissolved in aqueous electrolyte, the dissolution and shuttle of salt thus generating irreversible by-products, which is vulnerable to the reduction of the specific capacity and the damage of the battery life [54,55]. In contrast, the C=N double bond within the ring in NTNQ molecule is more probably to maintain the original conjugated structure, resulting in excellent cyclic stability [19,49,56]. The electrodes dissolution state and UV analysis were further utilized to confirm the above inference.…”

Section: Electrochemical Performance Measurementsmentioning

confidence: 85%

“…NTNQ exhibits two pairs of redox peaks, indicating the two-step charge storage [45,48]. The oxidation peaks are located at 0.71 and 0.96 V, and the corresponding reduction peaks are observed at 0.57 and 0.81 V [49][50][51]. Among the five cycles conducted at 0.2 mV•s -1 , the first cycle exhibited poor cyclic stability, while the CV peaks almost maintained shapes and areas in the last four cycles, indicating a reversible redox reaction.…”

Section: Electrochemical Performance Measurementsmentioning

confidence: 99%

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Robust ring insoluble naphthoquinone derivative cathode with high loading and long cycle life for aqueous zinc organic batteries

Wang,

Gao,

Wang

et al. 2024

Nano Research Energy

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Organic materials for aqueous zinc ion batteries have been attracted the attention of researchers because of their high safety, environmental friendliness, and structural designability. However, the limited specific capacity, unsatisfactory cycling durability, and unclear charge storage mechanism limit their development and applications. Herein, NTCDA-2,3-DNQ, an organic compound with a benzimidazole ring structure, was designed through the number and distribution of active sites as well as the adjustment of molecular weight, and applied as the cathode for aqueous zinc-ion batteries. NTNQ exhibits high specific capacity of 290.5 mAh•g -1 at 0.05 A•g -1 , excellent rate performance of 133.3 mAh•g -1 at 15 A•g -1 , and relatively stable cycle life with 81.7% capacity retention over 10,000 superlong cycles at 10 A•g -1 . Furthermore, the synergistic effect of neighboring active sites and multi-electron Zn 2+ storage reactions are further explored by density functional theory (DFT) calculations, and the results show that NTNQ could stores 4Zn 2+ while transferring 8e -in the N-Zn-O pathway during the storage of Zn 2+ . Interestingly, NTNQ still exhibits high specific capacity and favorable cycling stability at multiple ultra-high loadings. This work provides important chances including the design concepts of the organic molecules and the investigation of the Zn 2+ storage mechanism for high performance aqueous zinc ion batteries.

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Section: Electrochemical Performance Measurementsmentioning

confidence: 85%

Section: Electrochemical Performance Measurementsmentioning

confidence: 99%

Robust ring insoluble naphthoquinone derivative cathode with high loading and long cycle life for aqueous zinc organic batteries

Wang,

Gao,

Wang

et al. 2024

Nano Research Energy

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“…At present, there are more and more studies on carbonyl active groups [ 27 , 34 , 35 ] ( Figure 1 a), which are composed of –C=O– bonds ( Figure 2 ). They have fast electrochemical kinetics, a high capacity, and are capable of storing a variety of ions [ 29 , 36 , 37 ]. Carbonyl compounds are almost completely insoluble in aqueous electrolytes, but their discharge products are highly soluble.…”

Section: Active Functional Groups Of Cofs Materialsmentioning

confidence: 99%

“…Carbonyl compounds are almost completely insoluble in aqueous electrolytes, but their discharge products are highly soluble. The generated free radical intermediates are usually unstable and can be converted into inactive compounds through reactions with other molecules or free radicals in the electrolyte, which inevitably limits their cycle stability [ 36 , 38 ]. For example, the tricarbonyl material dichloroisocyanuric acid (DCCA) has been identified as an irreversible structure because of the formation of inactive precipitates [ 39 ].…”

Section: Active Functional Groups Of Cofs Materialsmentioning

confidence: 99%

Recent Progress in Covalent Organic Frameworks for Cathode Materials

Wang,

Tian,

Chen

et al. 2024

Polymers

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Covalent organic frameworks (COFs) are constructed from small organic molecules through reversible covalent bonds, and are therefore considered a special type of polymer. Small organic molecules are divided into nodes and connectors based on their roles in the COF’s structure. The connector generally forms reversible covalent bonds with the node through two reactive end groups. The adjustment of the length of the connector facilitates the adjustment of pore size. Due to the diversity of organic small molecules and reversible covalent bonds, COFs have formed a large family since their synthesis in 2005. Among them, a type of COF containing redox active groups such as –C=O–, –C=N–, and –N=N– has received widespread attention in the field of energy storage. The ordered crystal structure of COFs ensures the ordered arrangement and consistent size of pores, which is conducive to the formation of unobstructed ion channels, giving these COFs a high-rate performance and a long cycle life. The voltage and specific capacity jointly determine the energy density of cathode materials. For the COFs’ cathode materials, the voltage plateau of their active sites’ VS metallic lithium is mostly between 2 and 3 V, which has great room for improvement. However, there is currently no feasible strategy for this. Therefore, previous studies mainly improved the theoretical specific capacity of the COFs’ cathode materials by increasing the number of active sites. We have summarized the progress in the research on these types of COFs in recent years and found that the redox active functional groups of these COFs can be divided into six subcategories. According to the different active functional groups, these COFs are also divided into six subcategories. Here, we summarize the structure, synthesis unit, specific surface area, specific capacity, and voltage range of these cathode COFs.

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“…108 Revealing the essential relationship between active functional groups and electrochemical performance is helpful for further research of water-based rechargeable ZIBs. Li et al 109 introduced anthraquinone carbonyl active sites into TfDa-CAF, which was beneficial for improving the capacity and reversibility of ZIBs. After 10 000 cycles, the capacity retention rate remained at 98%.…”

Section: Cathode Materialsmentioning

confidence: 99%

Covalent organic frameworks and their composites for rechargeable batteries

Xu,

Gong,

et al. 2024

Nanoscale

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An anthraquinone-based covalent organic framework for highly reversible aqueous zinc-ion battery cathodes

Abstract: Aqueous rechargeable zinc-ion batteries (ZIBs) are emerging as one of the outstanding candidates for energy storage systems on account of their excellent safety, lower price, and higher volumetric energy density....

Cited by 6 publications

References 65 publications

Robust ring insoluble naphthoquinone derivative cathode with high loading and long cycle life for aqueous zinc organic batteries

Robust ring insoluble naphthoquinone derivative cathode with high loading and long cycle life for aqueous zinc organic batteries

Recent Progress in Covalent Organic Frameworks for Cathode Materials

Covalent organic frameworks and their composites for rechargeable batteries

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