Cobalt Coordinated Cyano Covalent-Organic Framework for High-Performance Potassium-Organic Batteries

Zhao, Lu; Zheng, Lianxi; Li, Xiaopeng; Wang, Han; Lv, Liping; Chen, Shuangqiang; Sun, Weiwei; Wang, Yong

doi:10.1021/acsami.1c15441

Cited by 43 publications

(33 citation statements)

References 56 publications

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“…Two similar cyano‐COF and cyano‐COF with Co coordination (named cyano‐COFCo) were synthesized as anodes for potassium–organic batteries. [ 113 ] As shown in Figure 7b, cyano‐COFCo displayed the decreased crystallinity of COF structure compared to cyano‐COF, because the introduction Co center could increase defects into the COF structure. The K + diffusion coefficient in the cyano‐COFCo electrode was calculated to be 3.02 × 10 −12 to ≈1.49 × 10 −11 cm 2 s −1 , which was significantly higher than that for the pristine cyano‐COF electrode (2.73 × 10 −13 to ≈7.49 × 10 −12 cm 2 s −1 ).…”

Section: Design Principles For Ion‐conducting Cofsmentioning

confidence: 99%

Section: Design Principles For Ion‐conducting Cofsmentioning

confidence: 99%

“…When the COFCo was served as anode for potassium‐ion batteries, it exhibited better rate properties and cycling stability than that of the corresponding COF anode with high crystallinity. [ 113 ] Besides, for some COF electrodes, the crystallinity of COFs could be changed after the charge/discharge process. Ruoff and co‐workers prepared a new type of redox‐active covalent triazine framework (named rCTF), which was promising as an anode for LIBs.…”

Section: Applications Of Ion‐conducting Cof In Rechargeable Batteriesmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Cao

Wang

et al. 2022

Advanced Energy Materials

102

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The ionic conduction plays an important role in the charging/discharging kinetics in rechargeable batteries, mainly including the steps of diffusion in the electrodes, transport in the electrolytes, and permeation through the electrode/electrolyte interphases. [8][9][10] Generally, the ionic transport is a critical control step in the electrochemical reactions, because it is much slower kinetics than electron transport. [8,11] Thus, regulating the ion-transport behavior is very vital to achieve fast-charging secondary batteries. [6,12] Mechanism exploration and novel material design become two important strategies to tackle the sluggish ionconduction kinetics. [13][14][15][16][17] In the secondary battery, the environment of ionic conduction can be roughly divided into liquid electrolytes and solid conductors. The ionic diffusion in the liquid electrolytes can be very fast. However, the flammability of organic solvents and the instability of salts (such as LiPF 6 ) at elevated temperature limit its commercial application. [18,19] The solid conductor is a safer choice to replace the current liquid electrolyte, but still suffers a serious impediment of low ionic conductivity. [20,21] Recently, covalent organic frameworks (COFs), an emerging type of crystalline porous materials, are considered to be a potential solid conductor. [22,23] Depending on the topological establishment of building blocks, COFs are classified into 2D COFs and 3D COFs. Unless otherwise noted, the COFs in this review specifically refer to 2D COFs. 2D COFs typically crystallize as stacked sheets through the π-π interaction between adjacent monolayers, meanwhile the organic units are connected by the covalent bond to form reticular framework with periodic channel structure. [24][25][26][27] Based on the nature of synthetic reactions, COFs have been synthesized with boroxine, boronate ester, borosilicate, triazine, imine, hydrazone, borazine, imide, spiroborate, amide linkages, etc. [24,25] In addition, based on the symmetry of the monomers, COFs can be designed in various topologies, such as tetragonal, hexagonal, rhombic, and trigonal. [24,25] Over the recent decades, a variety of synthetic approaches have been developed to prepare COFs, such as solvothermal synthesis, microwave synthesis, ionothermal synthesis, mechanochemical synthesis, and interfacial synthesis. [24,25] Among them, the solvothermal synthesis under a sealed vessel with a suitable temperature can produce highly crystalline COFs, but this method always needs a long Ionic conduction plays a critical role in the process of electrode reactions and the charge transfer kinetics in a rechargeable battery. Covalent organic frameworks (COFs) have emerged as an exciting new class of ionic conductors, and have made great progress in terms of their application in rechargeable batteries. The unique features of COFs, such as well-defined directional channels, functional diversity, and structural robustness, endow COF-based conductors with a low ionic diffusion energy barrier and excellent t...

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Section: Design Principles For Ion‐conducting Cofsmentioning

confidence: 99%

Section: Design Principles For Ion‐conducting Cofsmentioning

confidence: 99%

Section: Applications Of Ion‐conducting Cof In Rechargeable Batteriesmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Cao

Wang

et al. 2022

Advanced Energy Materials

102

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Hydrated Bi‐Ti‐Bimetal Ethylene Glycol: A New High‐Capacity and Stable Anode Material for Potassium‐Ion Batteries

Wen

Cai

et al. 2023

Adv Funct Materials

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Potassium-ion batteries have emerged not only as low-cost alternatives to lithium-ion batteries, but also as high-voltage energy storage systems. However, their development is still encumbered by the scarcity of highperformance electrode materials that can endure successive potassium-ion uptake. Herein, a hydrated Bi-Ti bimetallic ethylene glycol (H-Bi-Ti-EG) compound is reported as a new high-capacity and stable anode material for potassium storage. H-Bi-Ti-EG possesses a long-range disordered layered framework, which helps to facilitate electrolyte ingress into the entire Bi nanoparticles. A suite of spectroscopic analyses reveals the in situ formation Bi nanoparticles within the organic polymer matrix, which can alleviate stresses caused by the huge volume expansion/contraction during deep cycles, thereby maintaining the superior structural integrity of H-Bi-Ti-EG organic anode. As expected, H-Bi-Ti-EG anode exhibits a high capacity and superior long-term cycling stability. Importantly for potassium storage, it can be cycled at current densities of 0.1, 0.5, 1, and 2 Ag −1 for 800, 700, 1000, and even 6000 cycles, retaining charging capacities of 361, 206, 185, and 85.8 mAh g −1 , respectively. The scalable synthetic method along with the outstanding electrochemical performance of hydrated Bi-Ti-EG, which is superior to other reported Bi-based anode materials, places it as a promising anode material for high-performance potassium storage.

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Optimization Strategies of Covalent Organic Frameworks and Their Derivatives for Electrocatalytic Applications

Xiao,

Wang,

Guan

2023

Adv Funct Materials

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Covalent organic frameworks (COFs) are crystalline organic porous polymers that can be precisely integrated by building blocks to achieve pre‐designed composition, components, and functions, making them a powerful platform for the development of molecular devices in the field of electrocatalysis. The precise control of channel/dopant positions and highly ordered network structures of COFs provide an ideal material system for the applications of advanced electrocatalysis. In this paper, the topological structure design and synthesis methods of COFs are reviewed in detail, and their design principles are deeply analyzed. In addition, the applications of COFs and their derivatives in the field of electrocatalysis are systematically summarized and the optimization strategies are proposed. Finally, the application prospects of COFs and their derivatives in electrocatalysis and the challenges that may be encountered in the future are prospected, providing helpful guidance for future research.

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Cobalt Coordinated Cyano Covalent-Organic Framework for High-Performance Potassium-Organic Batteries

Cited by 43 publications

References 56 publications

Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Hydrated Bi‐Ti‐Bimetal Ethylene Glycol: A New High‐Capacity and Stable Anode Material for Potassium‐Ion Batteries

Optimization Strategies of Covalent Organic Frameworks and Their Derivatives for Electrocatalytic Applications

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