CO₂‐Etching Creates Abundant Closed Pores in Hard Carbon for High‐Plateau‐Capacity Sodium Storage

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(3)

Published: Nov. 29, 2023

Abstract Hard carbon (HC) has become the most promising anode material for sodium‐ion batteries (SIBs), but its plateau capacity at ≈0.1 V (Na + /Na) is still much lower than that of graphite (372 mAh g −1 ) in lithium‐ion (LIBs). Herein, a CO 2 ‐etching strategy applied to generate abundant closed pores starch‐derived hard effectively enhances Na storage. During etching, open are first formed on matrix, which situ reorganized through high‐temperature carbonization. This ‐assisted pore‐regulation increases diameter and HC, simultaneously maintains microsphere morphology (10–30 µm diameter). The optimal HC exhibits Na‐storage 487.6 with high initial Coulomb efficiency 90.56%. A record‐high 351 achieved, owing micropores generated by ‐etching. Comprehensive ex tests unravel storage performance originates from pore‐filling mechanism micropores.

Language: Английский

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Facile synthesis of three-dimensional hollow porous carbon doped polymeric carbon nitride with highly efficient photocatalytic performance

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 438, P. 135623 - 135623

Published: March 7, 2022

Language: Английский

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High performance supercapacitors based on wood-derived thick carbon electrodes synthesized via green activation process

Inorganic Chemistry Frontiers, Journal Year: 2022, Volume and Issue: 9(23), P. 6108 - 6123

Published: Jan. 1, 2022

A green, versatile, and universal H 2 O activation method is proposed to improve the capacitive properties of high-mass loading wood-based supercapacitors.

Language: Английский

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Nitrogen-doped carbon layer on cellulose derived free-standing carbon paper for high-rate supercapacitors

Applied Surface Science, Journal Year: 2022, Volume and Issue: 608, P. 155144 - 155144

Published: Oct. 5, 2022

Language: Английский

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Designing carbon anodes for advanced potassium-ion batteries: Materials, modifications, and mechanisms

Advanced Powder Materials, Journal Year: 2022, Volume and Issue: 1(4), P. 100057 - 100057

Published: May 10, 2022

Recently, the limited abundance and uneven geographical distribution of Li resources seriously hamper growing demand for lithium-based energy storage devices. In this regard, potassium-ion batteries (KIBs) sharing similar “rocking chair” working principles with lithium-ion have started to attract increasing attention due their high density abundant potassium resources. Carbon material is considered show great potential using as high-performance anode in KIBs. However, it still a challenge simultaneously achieve satisfactory specific gravimetric volumetric capacities, initial Coulombic efficiency, superior rate performance, excellent cycle stability sluggish reaction kinetics large-sized K-ions. Herein, we summarize latest research achievements different types carbon anodes KIBs, including graphite, graphene, hard carbon, soft nanotubes, which key factors affecting electrochemical performance are explored. Importantly, alternative strategies addressing low gravimetric/volumetric capacity efficiency carbons thoroughly emphasized. Finally, critical issues, challenges, perspectives proposed development direction We hope review can provide researchers new ideas design materials give insightful accelerate application electrodes

Language: Английский

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Ultrathin layered 2D/2D heterojunction of ReS2/high-crystalline g-C3N4 for significantly improved photocatalytic hydrogen evolution

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 448, P. 137613 - 137613

Published: June 17, 2022

Language: Английский

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In-situ etching and ion exchange induced 2D-2D MXene@Co9S8/CoMo2S4 heterostructure for superior Na+ storage

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 138508 - 138508

Published: Aug. 5, 2022

Language: Английский

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Angstrom‐Level Ionic Sieve 2D‐MOF Membrane for High Power Aqueous Zinc Anode

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(28)

Published: April 3, 2023

Abstract Aqueous Zn‐ion energy‐storage deviceswith metal Zn as anodes, including batteries and capacitors (ZIBs ZICs), is largely hindered by dendritic growth low coulombic efficiency since the side reactions between anodes electrolyte, originating fromthat targeted efficient isolation of H 2 O SO 4 2− extremely challenging. Herein, inspired density functional theory (DFT) that 2D angstrom level metal‐organic framework(2D‐MOF) highly selective for passage ions, simultaneously excluding H2O but allowing + conduction. Moreover, 2D‐MOF exhibits better mechanical strength compared with 3D‐MOF, which more conducive to inhibit dendrite growth. Impressively, benefiting from 2D‐MOFlayer, symmetric cells survived up 2000 h at mA cm −2 ,near 20‐times bare anodes. Coupling it cathode ZICs ZIBs, excellent electrochemical performances are presented. Importantly, Na ionic sieve membrane also deliver small polarization outstanding performance, indicating this study provides an strategy develop long‐life anode.

Language: Английский

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Enhancing pseudocapacitive behavior of MOF-derived TiO2-x@Carbon nanocubes via Mo-doping for high-performance sodium-ion capacitors

Composites Part B Engineering, Journal Year: 2023, Volume and Issue: 253, P. 110557 - 110557

Published: Jan. 25, 2023

Language: Английский

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Gradient Pores Enhance Charge Storage Density of Carbonaceous Cathodes for Zn‐Ion Capacitor

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 13, 2024

Abstract Engineering carbonaceous cathode materials with adequately accessible active sites is crucial for unleashing their charge storage potential. Herein, activated meso‐microporous shell carbon (MMSC‐A) nanofibers are constructed to enhance the zinc ion density by forming a gradient‐pore structure. A dominating pore size of 0.86 nm tailored cater solvated [Zn(H 2 O) 6 ] 2+ . Moreover, these gradient porous feature rapid ion/electron dual conduction pathways and offer abundant surfaces high affinity electrolyte. When employed in Zn‐ion capacitors (ZICs), electrode delivers significantly enhanced capacity (257 mAh g −1 ), energy (200 Wh kg at 78 W cyclic stability (95% retention after 10 000 cycles) compared nonactivated electrode. series situ characterization techniques unveil that improved Zn capability stems from compatibility between pores , co‐adsorption H + SO 4 2− as well reversible surface chemical interaction. This work presents an effective method engineering toward energy‐density storage, also offers insights into mechanism such structures.

Language: Английский

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