Templated synthesis of imine-based covalent organic framework hollow nanospheres for stable potassium-ion batteries

Sun, Jianlu; Tian, Ruiqi; Man, Yuehua; Fei, Yating; Zhou, Xiaosi

doi:10.1016/j.cclet.2023.108233

Cited by 22 publications

(14 citation statements)

References 29 publications

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Section: Potassium-ion Batteriesmentioning

confidence: 99%

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Sun,

Yang

et al. 2023

ACS Nano

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Covalent organic frameworks (COFs) have attracted considerable interest in the field of rechargeable batteries owing to their three-dimensional (3D) varied pore sizes, inerratic porous structures, abundant redox-active sites, and customizable structure-adjustable frameworks. In the context of metal-ion batteries, these materials play a vital role in electrode materials, effectively addressing critical issues such as low ionic conductivity, limited specific capacity, and unstable structural integrity. However, the electrochemical characteristics of the developed COFs still fall short of practical battery requirements due to inherent issues such as low electronic conductivity, the tradeoff between capacity and redox potential, and unfavorable micromorphology. This review provides a comprehensive overview of the recent advancements in the application of COFs, COF-based composites, and their derivatives in rechargeable metal-ion batteries, including lithium-ion, lithium-sulfur, sodium-ion, sodium-sulfur, potassium-ion, zinc-ion, and other multivalent metal-ion batteries. The operational mechanisms of COFs, COF-based composites, and their derivatives in rechargeable batteries are elucidated, along with the strategies implemented to enhance the electrochemical properties and broaden the range of their applications.

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Section: Potassium-ion Batteriesmentioning

confidence: 99%

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Sun,

Yang

et al. 2023

ACS Nano

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“…Na (K) metal batteries (NMB and KMB) are regarded as a particularly interesting candidate for next-generation high energy density devices owing to their high theoretical capacity (1165 mAh g −1 for Na; 687 mAh g −1 for K), a low electrode potential (−2.71 V vs standard hydrogen electrode (SHE) for Na and −2.93 V vs SHE DOI: 10.1002/adfm.202307628 for K), and availability of Na (K) source. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Therefore, based on Na (K) metal as anode, the high-energy density NMB (KMB) can be constructed, such as Na (K)-S, Na (K)-O 2 cells system. [15,16] However, uncontrolled dendrites growth of Na (K) and instable Na (K) electrode/electrolyte interface result from the electrochemical reaction between the high electrochemical activity of Na (K) metal and electrolyte, which seriously inhibits the development of NMB (KMB).…”

Section: Introductionmentioning

confidence: 99%

Ultrastable Sodium/Potassium Metal Anode Enabled by a Multifunctional Interphase Layer with Enhanced Ion Transport Kinetics

Yu,

Jiang,

Cheng

et al. 2023

Adv Funct Materials

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Na (K) metal batteries (NMB and KMB) have gained tremendous attention as large‐scale energy storage systems because of their high specific capacity, low working potential, and natural abundance. However, severe Na dendrite growth hinders the practical application of Na (K) anode. Here, a multifunctional interphase layer consisting of fast‐ion conductive Na–Bi (K–Bi) alloy and sodiophilic (potassiophilic) Na3VO4 (K3VO4) phases, which i derived from a spontaneous reaction (denoted as BVO@Na or BVO@K), is proposed and prepared. The designed electrode exhibits enhanced ion transport kinetics and homogenous Na (K) deposition behavior, and finally achieving dendrite‐free Na (K) growth. Accordingly, the BVO@Na displays a high Na plating/stripping reversibility of 960 h at 1.0 mA cm−2, 1.0 mAh cm−2, and the BVO@K electrode can be operated a cycle lifespan of 870 h under 1.0 mA cm−2, 2.0 mAh cm−2 in symmetric cells. In BVO@Na||Na3V2(PO4)3 full battery, it shows remarkable cycling stability (91% of capacity retention after 1900 cycles) and a high energy density of 281 Wh kg−1 at a power density of 16.2 kW kg−1. The findings lend credence to the prospect of the multifunctional interface layer contributing to the design of a protective layer for alkali metal anodes.

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“…[3b,6] As such, chemically unstable solid electrolyte interphase (SEI) layers are inevitably generated on the electrode surface and severely degrade cell performance. [3b,6,7] To address these issues with COF-based electrodes, various approaches to modulate the properties of COFs, such as molecular modification, [8] chemical doping, [9] combining with functional materials, [5,10] pore control, [11] and morphological control [12] have been extensively explored, but none of them had led to satisfactory performance. Therefore, it remains a grand challenge to stabilize the electrode-electrolyte interface of COF-based electrodes to fully exploit their porous nanostructure toward practical applications in KIBs.…”

Section: Introductionmentioning

confidence: 99%

Fluorine‐Rich Covalent Organic Framework to Boost Electrochemical Kinetics and Storages of K⁺ Ions for Potassium‐Ion Battery

Lee

Lim

Park

et al. 2023

Advanced Energy Materials

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Covalent organic frameworks (COFs), featuring ordered nanopores with numerous accessible redox sites, have drawn much attention as promising electrode materials for rechargeable batteries. Thus far, however, COF-based battery electrodes have exhibited limited capacity and unsatisfactory cycling stability due to the unwanted side reactions over their large surface area. Herein, a fluorine-rich covalent organic framework (F-COF) as an electrode material with improved stability and performance for potassium-ion batteries is developed. The fluorinated COF not only stabilizes intercalation kinetics of K + ions but also reinforces its electron affinity and conductivity, improving the reversibility of bond transitions during discharge-charge cycles. As a result, F-COF affords a high specific capacity (95 mAh g −1 at fast rates up to 5 C) and excellent cycling stability (5000 cycles with ≈99.7% capacity retention), outperforming the pristine COF-based electrodes devoid of F atoms. Notably, the experimental capacity of F-COF approaches its theoretical value, confirming that a large proportion of electroactive sites are being actively utilized. Altogether, this work addresses the significant role of F atoms in improving the K + -ion storage capability of COFs and provides the rational design principles for the continued development of stable and high-performance organic electrode materials for energy storage devices.

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Templated synthesis of imine-based covalent organic framework hollow nanospheres for stable potassium-ion batteries

Cited by 22 publications

References 29 publications

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Ultrastable Sodium/Potassium Metal Anode Enabled by a Multifunctional Interphase Layer with Enhanced Ion Transport Kinetics

Fluorine‐Rich Covalent Organic Framework to Boost Electrochemical Kinetics and Storages of K⁺ Ions for Potassium‐Ion Battery

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Templated synthesis of imine-based covalent organic framework hollow nanospheres for stable potassium-ion batteries

Cited by 22 publications

References 29 publications

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Covalent Organic Frameworks: Their Composites and Derivatives for Rechargeable Metal-Ion Batteries

Ultrastable Sodium/Potassium Metal Anode Enabled by a Multifunctional Interphase Layer with Enhanced Ion Transport Kinetics

Fluorine‐Rich Covalent Organic Framework to Boost Electrochemical Kinetics and Storages of K+ Ions for Potassium‐Ion Battery

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Fluorine‐Rich Covalent Organic Framework to Boost Electrochemical Kinetics and Storages of K⁺ Ions for Potassium‐Ion Battery