Closed-Pore Hard Carbon Nanospheres via Aldol Condensation for Sodium Storage

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Language: Английский

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Tuning the Micropore Structure in Bamboo-Derived Hard Carbons Toward High Sodium Storage Capacity

Published: Jan. 1, 2025

Language: Английский

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Regulating Closed Pore Structure of Coal-Based Hard Carbon Anode by Preoxidation for High-Rate Performance Sodium-Ion Batteries

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Coal-derived hard carbons (CHCs) have considerable potential as sodium storage materials because of their abundant resources and structural diversity. Nevertheless, the smaller layer spacing ordered carbon microstructure CHCs bring about low charge/discharge rates poor cycle life sodium-ion batteries (SIBs), rendering it challenging to support large-scale energy applications. Herein, preoxidation strategy is employed achieve multiscale structure optimization improve its capacity. The oxygen content in preoxidized coal reached 15.2%, contributing increasing cross-linked materials. Particularly, insertion Na+ facilitated by large 0.394 nm, well closed pores (0.162 cm3 g-1) improving diffusion Na+. Consequently, rate performance as-optimized anode (OCHC3) superior that directly carbonized. Specifically, OCHC3 exhibits a commendable (201 mAh achieves outstanding cycling stability (96.2%) over 500 cycles. Furthermore, galvanostatic intermittent titration reveals "adsorption-insertion-filling" OCHC3. This study enlightens rational design high-performance HC anodes for SIBs beyond.

Language: Английский

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Bridging Structure and Performance: Decoding Sodium Storage in Hard Carbon Anodes

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

Published: April 9, 2025

Amorphous carbon, particularly hard carbon (HC), is widely considered as the most promising anode material for sodium-ion batteries (SIBs) due to its high reversible capacity and cost-effectiveness. However, complex poorly defined structural properties of HC present challenges in understanding underlying sodium storage mechanisms. To facilitate rational design high-performance anodes, a comprehensive correlation between microstructure behavior critical. This Review critically examines interplay features capabilities, focusing on two key factors: pore structure surface functional groups. It begins by outlining fundamental mechanisms HC, followed an in-depth discussion how chemistry influence storage. Finally, strategic insights are provided manipulate these factors optimize performance. aims drive development next-generation anodes support commercialization SIBs.

Language: Английский

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Self-supporting Fe₇S₈ microsphere/N-doped carbonized silk textile for high-performance sodium-ion batteries

Materials Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The ultra-flexible Fe 7 S 8 microsphere/N-doped carbonized silk textile exhibits excellent cycling stability and rate performance, with negligible volume expansion retained structural integrity even after 600th cycles.

Language: Английский

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Covalent Organic Nanosheets with a Tunable Electronic Structure to Achieve Unprecedented Stability and High‐Performance in Sodium‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Abstract This study develops a new type of fluorinated covalent organic nanosheets (CONs) as anode materials for sodium‐ion batteries by incorporating an electron‐withdrawing benzothiadiazole (BT) unit and F atom into the framework. These modifications lead to reduced bandgap electron density, generating strong permanent dipoles that increased Na + accessible sites within self‐assembled solid‐state structure. To elucidate effect these electronic changes, storage performance D/A‐CON‐10‐F is compared nonfluorinated D/A‐CON‐10. The density in weakens its interaction with , yet enhances ion charge carrier conductivities, leading improved electrochemical performance. Notably, exhibits reversible discharge capacity ≈637 mA h g −1 at 100 maintaining structural stability over 5000 cycles excellent rate capability. results demonstrate dipole engineering CONs effectively transport long‐term stability, offering promising strategy next‐generation battery anodes.

Language: Английский

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Copper-tin catalyzed methane pyrolysis and solid carbon products as anode materials for sodium-ion batteries

International Journal of Green Energy, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 13

Published: March 6, 2025

Language: Английский

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Electrospun nanofiber Surface-Modified polyethylene separator for enhanced cycling stability and Low-Temperature performance of Sodium-Ion batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157803 - 157803

Published: Nov. 1, 2024

Language: Английский

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