One-Step Construction of Closed Pores Enabling High Plateau Capacity Hard Carbon Anodes for Sodium-Ion Batteries: Closed-Pore Formation and Energy Storage Mechanisms

ACS Nano, Journal Year: 2024, Volume and Issue: 18(18), P. 11941 - 11954

Published: April 23, 2024

Closed pores play a crucial role in improving the low-voltage (<0.1 V) plateau capacity of hard carbon anodes for sodium-ion batteries (SIBs). However, lack simple and effective closed-pore construction strategies, as well unclear formation mechanism, has severely hindered development high anodes. Herein, we present an strategy by one-step pyrolysis zinc gluconate (ZG) elucidate corresponding mechanism formation. The during ZG mainly involves (i) precipitation ZnO nanoparticles etching on under 1100 °C to generate open 0.45-4 nm (ii) graphitic domains shrinkage partial at 1100-1500 convert closed pores. Benefiting from considerable content suitable microstructure, optimized achieves ultrahigh reversible specific 481.5 mA h g

Language: Английский

---

Rationally Regulating Closed Pore Structures by Pitch Coating to Boost Sodium Storage Performance of Hard Carbon in Low‐voltage Platforms

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: May 20, 2024

Abstract Hard carbon (HC) materials with rich closed pore structures and nano‐scaled soft coating layer have emerged as promising anode in sodium‐ion batteries (SIBs). However, it still remains a tremendous challenge to precisely regulate thicknesses for achieving excellent electrochemical performance SIBs at low‐voltage platforms. Herein, PCHC‐10 abundant suitable‐sized size (0.45 nm) has been accurately designed by chemical crosslink reaction between the pre‐oxidized phenolic resin small addition of pitch form ester‐based bond. As anode, delivered large reversible capacity 359.8 mAh g −1 within 0.001–2.5 V, high 242.8 low voltage platforms (≤0.15 V). Besides, exhibits 91.4% retention 100 cycles, Na 3 V 2 (PO 4 ) //PCHC‐10 full cell superior rate energy density 231.2 Wh kg . Furthermore, detailed storage behaviors theoretical calculations revealed that HC owning pore‐size 0.45 nm strongest + abilities This work presents novel insight constructing boost capability

Language: Английский

---

Ni‐Single Atoms Modification Enabled Kinetics Enhanced and Ultra‐Stable Hard Carbon Anode for Sodium‐Ion Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(20)

Published: March 29, 2024

Abstract Hard carbon with randomly oriented interlayers is the most promising candidate for anode of commercial sodium‐ion batteries (SIBs). Nevertheless, its sluggish sodium storage kinetics and unsatisfactory cycling stability are bottlenecks to implementation. Herein, a metal‐single atom modification strategy proposed construct Ni‐single atoms modified N, P co‐doped hard (Ni‐NPC) Ni content ≈5.65 wt%. As an SIBs, Ni‐NPC exhibits far superior initial Coulombic efficiency, reversible specific capacity, rate capability, carbon. Combining in situ EIS ex‐situ XPS,this study reveals that modulate composition solid electrolyte interface layer, thereby improving Ni‐NPC. Theoretical calculation analysis suggest promoters diffusion Na + . Furthermore, aid systematic characterizations, structural evolution at different stages identified. This work proposes potential simultaneously anodes, elucidates improvement mechanism this strategy.

Language: Английский

---

Steric Hindrance Engineering to Modulate the Closed Pores Formation of Polymer‐Derived Hard Carbon for High‐Performance Sodium‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 21, 2024

The closed pores play a critical role in improving the sodium storage capacity of hard carbon (HC) anode, however, their formation mechanism as well efficient modulation strategy at molecular level polymer-derived HCs is still lacking. In this work, steric hindrance effect has been proposed to create for first time through grafting aromatic rings within and between main chains precursor. experimental data theoretical calculation demonstrate that steric-hindrance from ring side group can increase backbone rigidity internal free volumes polymer precursor, which prevent over graphitization facilitate during carbonization process. As result, as-prepared HC anode exhibits remarkably enhanced discharge 340.3 mAh/g 0.1 C, improved rate performance (210.7 5 C) boosted cycling stability (86.4 % 1000 cycles 2 C). This work provides new insight into mechanisms via engineering, shed light on development high-performance sodium-ion batteries.

Language: Английский

---

Nanoconfined Strategy Optimizing Hard Carbon for Robust Sodium Storage

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 8, 2024

Abstract Developing non‐graphitic carbons with unique microstructure is a popular strategy to enhance the significant potential in practical applications of sodium‐ion batteries (SIB), while electrochemical performance imbalances arising from their intricate active surface and porous structure pose challenges its commercialization. Inspired by biological cell membranes, N/P co‐doped hard carbon nanospheres (NPCS) anodes abundant ultramicropores (≈0.6 nm) are proposed synthesized as robust sodium anodes. Based on density functional theory calculations, optimizing can enable small Na + be well confined within pores hinder large solvent molecules invading reacting, introducing species contributes rapid adsorption/diffusion . In situ XRD Raman analysis suggest that nanoconfinement induced co‐doping enables highly reversible reactions. Electrochemical test confirms endows NPCS anode high capacity (376.3 mAh g −1 at 0.1 A ), superior initial coulombic efficiency (87.3% 1.0 remarkable rate capability (155.6 50.0 ) excellent cycling stability (with retention ≈94.6% after 10 000 cycles), lightening promising avenue for developing SIB durability.

Language: Английский

---

Precisely Tunable Instantaneous Carbon Rearrangement Enables Low‐Working‐Potential Hard Carbon Toward Sodium‐Ion Batteries with Enhanced Energy Density

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

As the preferred anode material for sodium-ion batteries, hard carbon (HC) confronts significant obstacles in providing a long and dominant low-voltage plateau to boost output energy density of full batteries. The critical challenge lies precisely enhancing local graphitization degree minimize Na

Language: Английский

---

Closed pore structure engineering from ultra-micropores with the assistance of polypropylene for boosted sodium ion storage

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(20), P. 12015 - 12025

Published: Jan. 1, 2024

Closed pore architectures with exceptional Na-storage performance have been successfully fabricated from ultra-micropores the assistance of polypropylene.

Language: Английский

---

Overview of hard carbon anode for sodium-ion batteries: Influencing factors and strategies to extend slope and plateau regions

Carbon, Journal Year: 2024, Volume and Issue: 228, P. 119354 - 119354

Published: June 15, 2024

Language: Английский

---

Soft template-induced self-assembly strategy for sustainable production of porous carbon spheres as anode towards advanced sodium-ion batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153646 - 153646

Published: July 1, 2024

Language: Английский

---

Molecular-level Precursor Regulation Strategy Aids Fast-charging Hard Carbon Anodes for Sodium-ion Batteries

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110824 - 110824

Published: Feb. 1, 2025

Language: Английский

---