Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 163, P. 100942 - 100942
Published: Feb. 1, 2025
Language: Английский
Small, Journal Year: 2023, Volume and Issue: 19(44)
Published: June 28, 2023
Abstract Covalent organic frameworks (COFs) are porous crystalline polymeric materials formed by the covalent bonding of units. The abundant units library gives COFs species diversity, easily tuned pore channels, and sizes. In addition, periodic arrangement endows regular highly connected which has led to rapid development in membrane separations. Continuous defect‐free high crystallinity COF membranes is key their application separations, most important issue be addressed research. This review article describes linkage types bonds, synthesis methods, size regulation strategies materials. Further, preparation continuous highlighted, including layer‐by‐layer (LBL) stacking, situ growth, interfacial polymerization (IP), solvent casting. applications separation fields also discussed, gas separation, water treatment, nanofiltration, ion conduction, energy battery membranes. Finally, research results summarized future prospect for outlined. More attention may paid large‐scale conductive
Language: Английский
Citations
61
Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(26)
Published: May 26, 2023
Abstract The growth of disordered lithium dendrite and the notorious reaction between Li electrolyte hamper practical application metal batteries (LMBs). Herein, an artificial solid interphase (ASEI) constructed by a nitro‐functionalized covalent organic framework (NO 2 ‐COF) is designed to regulate + deposition stable anodes. Strong electron‐withdrawing nitro groups can gather surrounding electrons connected monomer donor‐acceptor (D‐A) effect, thus regulating electron structure (COF) constructing specific cation‐oriented channel. uniform inhibition dendrites are achieved under such high‐selective transportation channel regulated surface electric charge. In addition, also be reduced NO − further react with produce high ionic‐conductivity 3 N LiN x O y during charging/discharging, which contributes migration . As result, ‐COF‐modified symmetrical realize ultra‐long cycling life more than 6000 h current density 5 mA cm −2 compared bare TpBD‐COF/Li (without nitro). full cells coupled LiFePO 4 stably cycle 1000 times capacity retention 91%. Hence, effectively optimizing effect provides better platform elevate performance LMB.
Language: Английский
Citations
60
Advanced Materials, Journal Year: 2023, Volume and Issue: unknown
Published: Oct. 9, 2023
Abstract Phase transformation of cobalt selenide (CoSe 2 ) can effectively modulate its intrinsic electrocatalytic activity. However, enhancing electroconductivity and catalytic activity/stability CoSe still remains challenging. Heterostructure engineering may be feasible to optimize interfacial properties promote the kinetics oxygen electrocatalysis on a ‐based catalyst. Herein, heterostructure consisting nitride (CoN) embedded in hollow carbon cage is designed via simultaneous phase/interface strategy. Notably, phase transition orthorhombic‐CoSe cubic‐CoSe (c‐CoSe accompanied by situ CoN formation realized build c‐CoSe /CoN heterointerface, which exhibits excellent/highly stable activities for reduction/evolution reactions (ORR/OER). local coordination environment increase Co‐Se/N bond lengths. Theoretical calculations show that Co‐site with an electronic state near Fermi energy level main active site ORR/OER.Energetical tailoring d‐orbital structure Co atom incorporation lowers thermodynamic barriers ORR/OER. Attractively, zinc‐air battery ‐CoN cathode displays excellent cycling stability (250 h) charge/discharge voltage loss (0.953/0.96 V). It highlights heterointerface provides option modulating bifunctional activity metal selenides controlled transformation.
Language: Английский
Citations
60
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Feb. 29, 2024
Abstract Covalent organic frameworks (COFs) are ideal templates for constructing metal-free catalysts the oxygen reduction reaction due to their highly tuneable skeletons and controllable porous channels. However, development of active sites within COFs remains challenging limited electron-transfer capabilities weak binding affinities intermediates. Herein, we constructed catalytic centres by modulating electronic states pyridine nitrogen atoms incorporated into COFs. By incorporating different units (such as pyridine, ionic imidazole units), tuned various properties including dipole moments, reductive ability, hydrophilicity, towards Notably, COF ( im -PY-BPY-COF) exhibited greater activity than neutral (PY-BPY-COF) ion -PY-BPY-COF). Specifically, -PY-BPY-COF demonstrated a half-wave potential 0.80 V in 0.1 M KOH, outperforming other Theoretical calculations situ synchrotron radiation Fourier transform infrared spectroscopy confirmed that carbon rings improved facilitating intermediate OOH* promoting desorption OH*. This study provides new insights design metal-like catalysts.
Language: Английский
Citations
47
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)
Published: July 1, 2023
Dual-interface modulation including buried interface as well the top surface has recently been proven to be crucial for obtaining high photovoltaic performance in lead halide perovskite solar cells (PSCs). Herein, first time, strategy of using functional covalent organic frameworks (COFs), namely HS-COFs dual-interface modulation, is reported further understand its intrinsic mechanisms optimizing bottom and surfaces. Specifically, layer can enhance resistance against ultraviolet radiation, more importantly, release tensile strain, which beneficial enhancing device stability improving order crystal growth. Furthermore, detailed characterization results reveal that on effectively passivate defects suppress non-radiation recombination, optimize crystallization growth film. Benefiting from synergistic effects, modified devices deliver champion efficiencies 24.26% 21.30% 0.0725 cm2 1 -sized devices, respectively. Moreover, they retain 88% 84% their initial after aging 2000 h under ambient conditions (25 °C, relative humidity: 35-45%) a nitrogen atmosphere with heating at 65
Language: Английский
Citations
46
Joule, Journal Year: 2024, Volume and Issue: 8(6), P. 1804 - 1819
Published: April 15, 2024
Language: Английский
Citations
35
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 352, P. 124060 - 124060
Published: April 21, 2024
Language: Английский
Citations
29
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: July 8, 2024
Organic piezoelectric nanogenerators (PENGs) are attractive in harvesting mechanical energy for various self-powering systems. However, their practical applications severely restricted by low output open circuit voltage. To address this issue, herein, we prepared two two-dimensional (2D) covalent organic frameworks (COFs, CityU-13 and CityU-14), functionalized with fluorinated alkyl chains PENGs. The piezoelectricity of both COFs was evidenced switchable polarization, characteristic butterfly amplitude loops, phase hysteresis conspicuous surface potentials high coefficient value (d
Language: Английский
Citations
24
Progress in Materials Science, Journal Year: 2024, Volume and Issue: 147, P. 101356 - 101356
Published: Aug. 27, 2024
Language: Английский
Citations
24
Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3396 - 3408
Published: Jan. 1, 2024
3D-ordered catalytic nanoarrays interlocked on anion exchange membranes for high-performance and long-life water electrolysis.
Language: Английский
Citations
21