Alkynyl Boosted High‐Performance Lithium Storage and Mechanism in Covalent Phenanthroline Framework

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(30)

Published: June 3, 2023

The poor conductivity of the pristine bulk covalent organic material is main challenge for its application in energy storage. mechanism symmetric alkynyl bonds (C≡C) materials lithium storage still rarely reported. Herein, a nanosized (≈80 nm) alkynyl-linked phenanthroline framework (Alkynyl-CPF) synthesized first time to improve intrinsic charge and insolubility lithium-ion batteries. Because high degree electron conjugation along units N atoms from groups, Alkynyl-CPF electrodes with lowest HOMO-LUMO gap (ΔE=2.629 eV) show improved by density functional theory (DFT) calculations. As result, electrode delivers superior cycling performance large reversible capacity outstanding rate properties (1068.0 mAh g-1 after 300 cycles at 100 mA 410.5 700 1000 ). Moreover, Raman, FT-IR, XPS, EIS, theoretical simulations, energy-storage C≡C groups has been investigated. This work provides new strategies insights design investigation electrochemical

Language: Английский

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Construction of Co9S8/MoS2/Ni2P double S-scheme heterojunction for enhanced photocatalytic hydrogen evolution

Surfaces and Interfaces, Journal Year: 2023, Volume and Issue: 42, P. 103353 - 103353

Published: Sept. 4, 2023

Language: Английский

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A facile route for the efficient leaching, recovery, and regeneration of lithium and iron from waste lithium iron phosphate cathode materials

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 342, P. 127069 - 127069

Published: March 11, 2024

Language: Английский

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Hierarchical Phosphide-Based Hybrid Anodes for High-Performance Lithium-Ion Batteries

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Transition metal phosphides (TMPs) have emerged as promising anode materials for lithium-ion batteries (LIBs). However, their poor intrinsic conductivity and significant volume changes result in slow redox kinetics structural collapse during cycling, which hinder practical application. Here, a hierarchical hybrid is synthesized by evenly dispersing Ni2P particles with N-doped carbon encapsulation on Co(OH)2 nanosheets (Co(OH)2/Ni2P@N–C). This distinctive structure enhances electron/ion reduces the Li+ transport distance, thereby boosting LIB performance. The Co(OH)2/Ni2P@N–C delivers high reversible capacity of 610 mAh g–1 at 0.05 A exhibits exceptional long-term stability. approach could pave way development high-performance LIBs provide crucial guidance designing high-energy-density anodes based TMPs.

Language: Английский

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Tailoring covalent triazine frameworks anode for superior Lithium-ion storage via thioether engineering

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143941 - 143941

Published: June 5, 2023

Language: Английский

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Surface Tailoring-Modulated Bifunctional Oxygen Electrocatalysis with CoP for Rechargeable Zn–Air Battery and Water Splitting

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(3), P. 3542 - 3551

Published: Jan. 12, 2024

The transition metal phosphide (TMP)-based functional electrocatalysts are very promising for the development of electrochemical energy conversion and storage devices including rechargeable metal–air batteries water electrolyzer. Tuning electrocatalytic activity TMPs is one vital steps to achieve desired performance these devices. Herein, we demonstrate modulation bifunctional oxygen nitrogen-doped carbon-encapsulated CoP (CoP@NC) nanostructures by surface tailoring with ultralow amount (0.56 atomic %) Ru nanoparticles (2.5 nm). at core on shell have a facile charge transfer interaction encapsulating NC. strong coupling CoP@NC boosts toward reduction (ORR), evolution (OER), hydrogen (HER) reactions. surface-tailored catalyst requires only 35 mV deliver benchmark current density 10 mA·cm–2 HER. A small potential gap 620 between ORR OER achieved, making highly suitable zinc–air (ZABs). homemade ZAB delivers specific capacity 780 mA·hgZn–1 peak power 175 mW·cm–2 voltaic efficiency loss (1.1%) after 300 cycles. two-electrode splitting cell (CoP@NC-Ru||CoP@NC-Ru) remarkably low voltage 1.47 V density. Stable 25 h without any significant change achieved. Theoretical studies support interaction-induced enhanced nanostructure.

Language: Английский

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A Metal‐Organic Framework‐Derived Strategy for Constructing Synergistic N‐Doped Carbon‐Encapsulated NiCoP@N‐C‐Based Anodes toward High‐Efficient Lithium Storage

Small, Journal Year: 2023, Volume and Issue: 20(17)

Published: Dec. 19, 2023

Abstract Transition metal phosphides (TMPs) have been regarded as the prospective anodes for lithium‐ion batteries (LIBs). However, their poor intrinsic conductivity and inevitable large volume variation result in sluggish redox kinetics collapse of electrode structure during cycling, which substantially hinders practical use. Herein, an effective composite electrodes design strategy “assembly phosphorization” is proposed to construct synergistic N‐doped carbon‐encapsulated NiCoP@N‐C‐based composites, employing a metal‐organic frameworks (MOFs) sacrificial hosts. Serving LIBs, one representative P‐NCP‐NC‐600 exhibits high reversible capacity (858.5 mAh g −1 , 120 cycles at 0.1 A ) superior long‐cycle stability (608.7 500 1 ). The impressive performances are credited effect between its unique structure, electronic properties ideal composition, achieve plentiful lithium storage sites reinforce structural architecture. By accompanying experimental investigations with theoretical calculations, deep understanding mechanism achieved. Furthermore, it revealed that more NiCoP components carbon fundamentally responsible realization superb properties. This proposes certain instructive significance toward designable high‐performance TMP‐based high‐energy density LIBs.

Language: Английский

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Hollow spheres constructed by ZnS-CoS2 @N-doped carbon@N-doped carbon as anodes for high-performance sodium-ion batteries

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 979, P. 173606 - 173606

Published: Jan. 21, 2024

Language: Английский

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MXene-loaded sea urchin-like CoP as anode materials for high-performance lithium-ion batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 88, P. 111545 - 111545

Published: April 6, 2024

Language: Английский

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Vacancies‐Induced Delocalized States Cobalt Phosphide for Binder‐Free Anode Toward Stable and High‐Rate Sodium‐Ion Batteries

Small, Journal Year: 2024, Volume and Issue: 20(43)

Published: July 7, 2024

Abstract Metal phosphides with easy synthesis, controllable morphology, and high capacity are considered as potential anodes for sodium‐ion batteries (SIBs). However, the inherent shortcomings of metal phosphating materials, such conductivity, kinetics, volume strain, etc not satisfactory, which hinders their large‐scale application. Here, a CoP@carbon nanofibers‐composite containing rich Co─N─C heterointerface phosphorus vacancies grown on carbon cloth (CoP 1‐x @MEC) is synthesized SIB anode to accomplish extraordinary ultra‐long cycle life. The hybrid composite nanoreactor effectively impregnates defective CoP active reaction center while offering layer buffer expansion during charge–discharge process. These vast interfaces, favored electrolyte infiltration, well‐structured ion‐electron transport network synergistically improve Na + storage electrode kinetics. By virtue these superiorities, @MEC binder‐free delivers superb SIBs performance including areal (2.47 mAh cm −2 @0.2 mA ), rate capability (0.443 @6 long cycling stability (300 cycles without decay), thus holding great promise inexpensive anode‐based practical applications.

Language: Английский

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