2D sp2-carbon-linked covalent organic frameworks as artificial SEI film for dendrite-free lithium metal batteries

Zhang, Conghui; Yang, Yongxin; Sun, Yongjiang; Duan, Lingyan; Mei, Zhiyuan; An, Qi; Jing, Qi; Zhao, Genfu; Guo, Hong

doi:10.1007/s40843-022-2396-x

“… a) The physicochemical structure of the sp 2 c‐COF film and suppression of dendrites. b) Cycling performance of sp 2 c‐COF@Li, Py‐COF@Li, and Li [93] . Copyright (2023), with permission from Springer Nature.…”

Section: Application Of Cofs In Alkali Metal‐ion Batteriesmentioning

confidence: 99%

“…Guo et al constructed an artificial SEI film for lithium metal batteries by constructing an intralayer fully Π-conjugated 2D sp 2 carbon chain COFs on the surface of lithium metal to reduce the growth of dendrites and stabilize the interfacial stable property. [93] The high conductivity of the conjugated structure leads to a substantial reduction of the interfacial impedance, increasing the Li + migration rate and interfacial distribution uniformity. For comparison, the low conductive PyÀ COF was also prepared as an artificial SEI membrane (Figure 8a).…”

Section: Cofs As Artificial Seimentioning

confidence: 99%

Covalent Organic Frameworks as Electrode Materials for Alkali Metal‐ion Batteries

Cui,

Miao,

Peng

et al. 2024

Chemistry A European J

1

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Covalent organic frameworks (COFs) are a class of porous crystalline polymeric materials constructed by linking organic small molecules through covalent bonds. COFs have the advantages of strong covalent bond network, adjustable pore structure, large specific surface area and excellent thermal stability, and have broad application prospects in various fields. Based on these advantages, rational COFs design strategies such as the introduction of active sites, construction of conjugated structures, and carbon material composite, etc. can effectively improve the conductivity and stability of the electrode materials in the field of batteries. This paper introduces the latest research results of high‐performance COFs electrode materials in alkali metal‐ion batteries (LIBs, SIBs, PIBs and LSBs) and other advanced batteries. The current challenges and future design directions of COFs‐based electrode are discussed. It provides useful insights for the design of novel COFs structures and the development of high‐performance alkali metal‐ion batteries.

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“…[11] Owing to the high crystallinity, high surface area, low density, and strong robustness, COFs have aroused broad concern for the applications in various fields, such as gas adsorption, [12] catalysis, [13] sensing, [14] optoelectronics, [15] and energy storage. [16] Recently, several COFs with lithiophilic units have also been employed as an alternative platform for the construction of solid electrolyte interface in lithium metal batteries, including imine, [17] β-ketoen-amine, [4] olefin, [18] and boroxine linked COFs, [19] as the ordered one-dimensional (1D) channels can supply high-speed routes for lithium ion transport, subsequently inhibiting the growth of lithium dendrites, and prolonging cycling lifetime. However, the diversity and density of lithiophilic groups anchored within the 1D channels of COFs are quite low, leading to modest capacity, short cycle lifetime, and low discharge stability.…”

Section: Introductionmentioning

confidence: 99%

Lithiophilic Covalent Organic Framework as Anode Coating for High‐Performance Lithium Metal Batteries

Wu,

Zhang,

Xu

et al. 2024

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The growth of disorganized lithium dendrites and weak solid electrolyte interphase greatly impede the practical application of lithium metal batteries. Herein, we designed and synthesized a new kind of stable polyimide covalent organic frameworks (COFs), which have a high density of well‐aligned lithiophilic quinoxaline and phthalimide units anchored within the uniform one‐dimensional channels. The COFs can serve as an artificial solid electrolyte interphase on lithium metal anode, effectively guiding the uniform deposition of lithium ions and inhibiting the growth of lithium dendrites. The unsymmetrical Li||COF‐Cu battery exhibits a Coulombic efficiency of 99% at a current density of 0.5 mA cm‐2, which can be well retained up to 400 cycles. Meanwhile, the Li‐COF||LFP full cell shows a Coulombic efficiency over 99% at a charge of 0.3 C. And its capacity can be well maintained up to 91% even after 150 cycles. Therefore, the significant electrochemical cycling stability illustrates the feasibility of employing COFs in solving the disordered deposition of lithium ions in lithium metal batteries.

show abstract

“…[11] Owing to the high crystallinity, high surface area, low density, and strong robustness, COFs have aroused broad concern for the applications in various fields, such as gas adsorption, [12] catalysis, [13] sensing, [14] optoelectronics, [15] and energy storage. [16] Recently, several COFs with lithiophilic units have also been employed as an alternative platform for the construction of solid electrolyte interface in lithium metal batteries, including imine, [17] β-ketoen-amine, [4] olefin, [18] and boroxine linked COFs, [19] as the ordered one-dimensional (1D) channels can supply high-speed routes for lithium ion transport, subsequently inhibiting the growth of lithium dendrites, and prolonging cycling lifetime. However, the diversity and density of lithiophilic groups anchored within the 1D channels of COFs are quite low, leading to modest capacity, short cycle lifetime, and low discharge stability.…”

Section: Introductionmentioning

confidence: 99%

Lithiophilic Covalent Organic Framework as Anode Coating for High‐Performance Lithium Metal Batteries

Wu,

Zhang,

Xu

et al. 2024

Angewandte Chemie

0

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The growth of disorganized lithium dendrites and weak solid electrolyte interphase greatly impede the practical application of lithium metal batteries. Herein, we designed and synthesized a new kind of stable polyimide covalent organic frameworks (COFs), which have a high density of well‐aligned lithiophilic quinoxaline and phthalimide units anchored within the uniform one‐dimensional channels. The COFs can serve as an artificial solid electrolyte interphase on lithium metal anode, effectively guiding the uniform deposition of lithium ions and inhibiting the growth of lithium dendrites. The unsymmetrical Li||COF‐Cu battery exhibits a Coulombic efficiency of 99% at a current density of 0.5 mA cm‐2, which can be well retained up to 400 cycles. Meanwhile, the Li‐COF||LFP full cell shows a Coulombic efficiency over 99% at a charge of 0.3 C. And its capacity can be well maintained up to 91% even after 150 cycles. Therefore, the significant electrochemical cycling stability illustrates the feasibility of employing COFs in solving the disordered deposition of lithium ions in lithium metal batteries.

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2D sp2-carbon-linked covalent organic frameworks as artificial SEI film for dendrite-free lithium metal batteries

Cited by 18 publications

References 42 publications

Covalent Organic Frameworks as Electrode Materials for Alkali Metal‐ion Batteries

Covalent Organic Frameworks as Electrode Materials for Alkali Metal‐ion Batteries

Lithiophilic Covalent Organic Framework as Anode Coating for High‐Performance Lithium Metal Batteries

Lithiophilic Covalent Organic Framework as Anode Coating for High‐Performance Lithium Metal Batteries

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