A novel covalent organic framework with high-density imine groups for lithium storage as anode material in lithium-ion batteries

Zhao, Huizi; Luo, Derong; Xu, Hai; He, Wenjie; Ding, Bing; Dou, Hui; Zhang, Xiaogang

doi:10.1007/s10853-022-07115-w

Cited by 29 publications

(17 citation statements)

References 47 publications

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“…From these experiments, it is clear that the lithiophilic functionalities become available upon charge‐discharge experiments. This phenomenon has been observed in covalent organic framework (COF) based batteries [50,51] . The COF based batteries performance increased upon pre‐conditioning at high current densities [50,51] .…”

Section: Resultsmentioning

confidence: 84%

“…This phenomenon has been observed in covalent organic framework (COF) based batteries. [50,51] The COF based batteries performance increased upon pre-conditioning at high current densities. [50,51] Therefore, we subjected the batteries for charge-discharge experiments at 10 A/g for 50 cycles.…”

Section: Resultsmentioning

confidence: 99%

“…[50,51] The COF based batteries performance increased upon pre-conditioning at high current densities. [50,51] Therefore, we subjected the batteries for charge-discharge experiments at 10 A/g for 50 cycles. Subsequently the batteries were subjected to chargedischarge experiments at low current densities.…”

Section: Resultsmentioning

confidence: 99%

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Linear Polymer Comprising Dual Functionalities with Hierarchical Pores for Lithium Ion Batteries

Aher,

Palani,

Krishnamoorthy

2023

ChemElectroChem

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Organic materials with carbonyl, azo, nitrile and imine moieties are widely used in lithium batteries. The solubility of these materials in battery electrolytes is an issue. Aggregation of the organic molecules can suppress the solubility, but the accessibility of lithium‐ion is hindered. Therefore, insoluble porous organic materials are desired. Herein, we synthesized a linear polymer with carbonyl and azo functionalities. Due to the presence of easily isomerizable azo moiety, a porous polymer was obtained. The polymer showed nano and micropores. The battery with the porous polymer showed an impressive specific capacity of 400 mA h/g at 0.2 A/g. If the battery is pre‐conditioned, the specific capacity increased to 615 mA h/g at the same current density. The post‐mortem analysis of the battery confirmed that the polymer didn't dissolve in the battery electrolyte. The control material is a small molecule with carbonyl and azo moieties that showed a poor specific capacity of 40 mA h/g indicating the necessity to have a hierarchically porous dual‐functional polymer.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Linear Polymer Comprising Dual Functionalities with Hierarchical Pores for Lithium Ion Batteries

Aher,

Palani,

Krishnamoorthy

2023

ChemElectroChem

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“…They both present the same shifty trend of diffusion coefficient (10 -12 to 10 -9 cm 2 s -1 ) in the range from 3.0 V to 0.01 V. Noting that, during the discharging/charging processes, the D Li + of VB/rGO is higher than that of VB4. Moreover, the diffusion coefficient of VB4/rGO is within or better than that of other reported organic materials, such as HAB-COF (10 -12.5 ~ 10 -9.5 cm 2 s -1 ) 46 , rCTF(7.00 × 10 −11 cm 2 s −1 ) 47 , and E-FCTF (2.43 × 10 -11 ~ 5.09 × 10 -10 cm 2 s -1 ) 48 , ensuring the better ions diffusion kinetics.…”

Section: Electrochemical Performancementioning

confidence: 70%

Enhanced cycling stability and rate capability of a graphene-supported commercialized Vat Blue 4 anode for advanced Li-ion batteries

Kang

Wang

et al. 2022

Chem. Sci.

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“…Furthermore, the solid-state 13 C CP/MAS NMR spectra revealed signals at 157 ppm (Figure S32), which can be ascribed to the carbon of −CN– linkages, confirming the formation of imine bonds in both COF-Nap and COF-Az. The high-resolution C 1 s XPS spectra indicated peaks at 285.9 eV for COF-Nap and 285.6 eV for COF-Az (Figure S33), which were assigned to carbon–nitrogen bonds (CN–C). − Fitting of the N 1 s region reveals peaks at 398.8 eV for COF-Nap and 398.3 eV for COF-Az, which were also ascribed to the CN–C bond. Hence, the C 1 s and N 1 s spectra confirmed the formation of imine bonds in the Schiff base reaction.…”

Section: Resultsmentioning

confidence: 99%

Isomeric Dual-Pore Two-Dimensional Covalent Organic Frameworks

Feng,

Chen,

Yan

et al. 2023

J. Am. Chem. Soc.

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Two-dimensional (2D) covalent organic frameworks (COFs) with hierarchical porosity have been increasingly recognized as promising materials in various fields. Besides, the 2D COFs with kagome (kgm) topology can exhibit unique optoelectronic features and have extensive applications. However, rational synthesis of the COFs with kgm topology remains challenging because of competition with a square-lattice topology. Herein, we report two isomeric dualpore 2D COFs with kgm topology using a novel geometric strategy to reduce the symmetry of their building blocks, which are four-armed naphthalene-based and azulene-based isomeric monomers. Owing to the large dipole moment of azulene, as-prepared azulene-based COF (COF-Az) possesses a considerably narrow band gap of down to 1.37 eV, which is much narrower than the naphthalene-based 2D COF (COF-Nap: 2.28 eV) and is the lowest band gap among reported imine-linked dual-pore 2D COFs. Moreover, COF-Az was used as electrode material in a gas sensor and exhibits high selectivity for NO 2 , including a high response rate (58.7%) to NO 2 (10 ppm), fast recovery (72 s), up to 10 weeks of stability, and resistance to 80% relative humidity, which are superior to those of reported COFbased NO 2 gas sensors. The calculation and in situ experimental results indicate that the large dipole moment of azulene boosts the sensitivity of the imine linkages. The usage of isomeric building blocks not only enables the synthesis of 2D COFs with isometric kgm topology but also provides an azulene-based 2D platform for studying the structure−property correlations of COFs.

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A novel covalent organic framework with high-density imine groups for lithium storage as anode material in lithium-ion batteries

Cited by 29 publications

References 47 publications

Linear Polymer Comprising Dual Functionalities with Hierarchical Pores for Lithium Ion Batteries

Linear Polymer Comprising Dual Functionalities with Hierarchical Pores for Lithium Ion Batteries

Enhanced cycling stability and rate capability of a graphene-supported commercialized Vat Blue 4 anode for advanced Li-ion batteries

Isomeric Dual-Pore Two-Dimensional Covalent Organic Frameworks

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