Emerging Two-Dimensional Covalent and Coordination Polymers for Stable Lithium Metal Batteries: From Liquid to Solid

Wang, Jiwei; Wang, Kaixi; Xu, Yuxi

doi:10.1021/acsnano.1c09194

Cited by 32 publications

(19 citation statements)

References 209 publications

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“…[ 122 ] Through electrostatic interaction, the oriented nanochannels and continuous negatively charged sites may effectively boost lithium‐ion conduction while minimizing polysulfide diffusion ( Figure 20 a ). [ 123 ] Consequently, with the aid of TpPa‐SO 3 Li layer, the Li‐S battery achieved a high initial capacity of 822.9 mA h −1 g −1 and a good cycling stability (Figure 20b,c )…”

Section: Separation Applications Of 2d Polymer Nanosheets‐based Membr...mentioning

confidence: 99%

2D Polymer Nanosheets for Membrane Separation

et al. 2022

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Since the discovery of single-layer graphene in 2004, the family of 2D inorganic nanosheets is considered as ideal membrane materials due to their ultrathin atomic thickness and fascinating physicochemical properties. However, the intrinsically nonporous feature of 2D inorganic nanosheets hinders their potential to achieve a higher flux to some extent. Recently, 2D polymer nanosheets, originated from the regular and periodic covalent connection of the building units in 2D plane, have emerged as promising candidates for preparing ultrafast and highly selective membranes owing to their inherently tunable and ordered pore structure, light weight, and high specific surface. In this review, the synthetic methodologies (including top-down and bottom-up methods) of 2D polymer nanosheets are first introduced, followed by the summary of 2D polymer nanosheets-based membrane fabrication as well as membrane applications in the fields of gas separation, water purification, organic solvent separation, and ion exchange/transport in fuel cells and lithium-sulfur batteries. Finally, based on their current achievements, the authors' personal insights are put forward into the existing challenges and future research directions of 2D polymer nanosheets for membrane separation. The authors believe this comprehensive review on 2D polymer nanosheets-based membrane separation will definitely inspire more studies in this field.

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Section: Separation Applications Of 2d Polymer Nanosheets‐based Membr...mentioning

confidence: 99%

2D Polymer Nanosheets for Membrane Separation

et al. 2022

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“…Covalent organic frameworks (COFs) are a class of organic macromolecules constructed by symmetric building units. − Two-dimensional (2D) COFs usually form periodic nanopores by the rigid network of covalent bonds, and the layers are stacked by π–π interactions. , This unique structure makes COFs desirable cathode materials for rechargeable batteries. Luo et al synthesized PIBN-G from tetraamino- p -benzoquinone (TABQ) and pyromellitic dianhydride.…”

Section: Introductionmentioning

confidence: 99%

An Anti-Aromatic Covalent Organic Framework Cathode with Dual-Redox Centers for Rechargeable Aqueous Zinc Batteries

Lin

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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Covalent organic frameworks (COFs) are promising cathode candidates with high structural stability. However, they contain redox inactive linkages and experience low redox potential. Herein, a full anti-aromatic microporous COF cathode material of TAQ-BQ is designed for aqueous zinc batteries. The anti-aromatic conjugation effectively lowers the energy level of the lowest unoccupied molecular orbital as revealed by theoretical calculations, which corresponds to an elevated redox potential. Besides, the structure contains imino active sites at the linkages, in addition to carbonyl at the active parts. As a result, the TAQ-BQ cathode exhibits a voltage of 1.53 V/1.54 V and between 1.35 and 0.45 V in zinc cells. It delivers 208 mAh g −1 capacity at 0.1 A g −1 and maintains 136 mAh g −1 at 2 A g −1 . Stable cycling is realized for 1000 cycles with 87% capacity retention. The co-de/insertion of Zn 2+ and protons is identified for energy storage. Our work reveals the promises of COF cathode materials for aqueous zinc batteries.

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“…[1][2][3][4] Unfortunately, during repeated charge-discharge processes, drastic metallic Li dendrites are easy to be generated at the surface of Li anodes. [5][6][7][8] Moreover, the uncontrollable Li dendrites cause a series of issues such as severe volume changes, low Coulombic efficiency (CE) as well as poor cycle life, which impede the commercial application of Li anodes. [9][10][11][12] A large number of theoretical and experimental studies demonstrate that Li dendrite generation mainly originates from the inhomogeneous nucleation of metallic Li as well as the huge concentration gradient of lithium ion and nonuniform electric field.…”

Section: Introductionmentioning

confidence: 99%

Eliminating Lightning‐Rod Effect of Lithium Anodes via Sine‐Wave Analogous MXene Layers

Chen

Shi

et al. 2022

Advanced Energy Materials

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Lithium metal anodes are regarded as the most promising candidate for rechargeable lithium‐based batteries, but uncontrollable Li dendrites hinder further applications. Here, sine‐wave analogous MXene (Ti3C2Tx) (SWA‐MXene) layers are produced by spreading aqueous MXene dispersion onto the sectional surface of a metallic coil and subsequently drying at room temperature. COMSOL Multiphysics simulations demonstrate that the low curvature in SWA‐MXene layers homogenizes the distributions of lithium ions and electric field, efficiently eliminating the lightning‐rod effect on the surface of aligned electrodes in the process of Li deposition. As a result, the flexible SWA‐MXene layers show a low overpotential for lithium nucleation (≈13.5 mV at 0.05 mA cm−2) and deep plating–stripping capacities up to 40 mAh cm−2, as well as a long cycle life up to 1250 h. Full cells consisting of a SWA‐MXene–Li anode and a LiFePO4 cathode also exhibit a durable cycle life up to 420 cycles at 1088 mA g−1.

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Emerging Two-Dimensional Covalent and Coordination Polymers for Stable Lithium Metal Batteries: From Liquid to Solid

Cited by 32 publications

References 209 publications

2D Polymer Nanosheets for Membrane Separation

2D Polymer Nanosheets for Membrane Separation

An Anti-Aromatic Covalent Organic Framework Cathode with Dual-Redox Centers for Rechargeable Aqueous Zinc Batteries

Eliminating Lightning‐Rod Effect of Lithium Anodes via Sine‐Wave Analogous MXene Layers

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