Hybrid Binder Chemistry with Hydrogen-Bond Helix for High-Voltage Cathode of Sodium-Ion Batteries

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(7), С. 4652 - 4664

Опубликована: Янв. 24, 2024

Since sodium-ion batteries (SIBs) have become increasingly commercialized in recent years, Na

Язык: Английский

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Demystifying the Influence of Precursor Structure on S‐Doped Hard Carbon Anode: Taking Glucose, Carbon Dots, and Carbon Fibers as Examples

Advanced Functional Materials, Год журнала: 2024, Номер 34(40)

Опубликована: Апрель 5, 2024

Abstract Heteroatom doping is a promising strategy for adjusting the microstructure of hard carbon (HC) to promote its electrochemical sodium storage performance. However, clarifying sites heteroatoms and effectively regulating their levels remain serious challenges. Herein, this work reveals impact three distinct structural precursors on S‐doped carbon: namely glucose (small organic molecule), dots (CDs, intermediate state between inorganic), graphitized fibers (inorganic materials). It demonstrated that HC derived from CDs possesses more significant number C─S bonds within framework, which attributed preferential bonding sulfur short polymeric chains abundant in unsaturated functional groups. And these cluster prominently surface CDs, enhancing affinity sulfur. Furthermore, as prominent feature extremely small size inherently distinguishes them other precursors, enabling serve fundamental units constructing various microstructures, such three‐dimensional (3D) structure. In summary, study explores influence different precursor structures heteroatom doping, with identified most useful precursor.

Язык: Английский

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Nanoconfined Strategy Optimizing Hard Carbon for Robust Sodium Storage

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 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.

Язык: Английский

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Hard carbon with opened pore structure for enhanced sodium storage performance

Energy & Environmental Science, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

OP-HC shows a high specific capacity of 350.7 mA h g −1 with ultra-high ICE. These results are attributed to its opened pore and enlarged d 002 interlayer spacing, which can enhance the reversibility Na + adsorption, intercalation filling process.

Язык: Английский

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Unlocking plateau capacity with versatile precursor crosslinking for carbon anodes in Na-ion batteries

Energy storage materials, Год журнала: 2024, Номер 70, С. 103543 - 103543

Опубликована: Июнь 1, 2024

Язык: Английский

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