Rationally Designing Closed Pore Structure by Carbon Dots to Evoke Sodium Storage Sites of Hard Carbon in Low‐Potential Region

Advanced Functional Materials, Год журнала: 2023, Номер 34(4)

Опубликована: Окт. 15, 2023

Abstract Hard carbon (HC) is widely regarded as the most promising anode material for sodium‐ion batteries (SIBs). For improving sodium storage capacity of HC anode, current research primarily focuses on high‐voltage slope region. Actually, increasing capability in low‐voltage plateau region more important enhancing energy density full cells. Therefore, this study, with rich closed pore structure designed and constructed help dots (CDs), it demonstrated that presence can provide sites region, resulting an obvious increase capacity. Moreover, pore‐filling intercalation mechanism revealed by situ Raman spectroscopy ex transmission electron microscopy (TEM). It worth noting induced not accompanied a decrease initial coulombic efficiency (ICE), due to fact introduction pores does contact area between electrode electrolyte. This work presents novel concepts structural design provides valuable insights into effective utilization SIBs.

Язык: Английский

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Design guidelines for a high-performance hard carbon anode in sodium ion batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(8), С. 2856 - 2863

Опубликована: Янв. 1, 2024

A systematic investigation established a significant correlation between the 2D to G band intensity ratio ( I / ) in Raman spectrum and internal kinetic barrier for sodium-ion transfer, achieving highest sodium plateau capacity of ∼400 mA h g −1 (A30 sample).

Язык: Английский

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

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

Опубликована: Май 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

Язык: Английский

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Closed pore engineering of activated carbon enabled by waste mask for superior sodium storage

Energy storage materials, Год журнала: 2024, Номер 66, С. 103183 - 103183

Опубликована: Янв. 8, 2024

Язык: Английский

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Biomass-derived carbon-sulfur hybrids boosting electrochemical kinetics to achieve high potassium storage performance

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 661, С. 598 - 605

Опубликована: Фев. 1, 2024

Язык: Английский

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Balancing microcrystalline domains in hard carbon with robust kinetics for a 46.7 Wh kg−1 practical lithium-ion capacitor

Chemical Engineering Journal, Год журнала: 2024, Номер 485, С. 149880 - 149880

Опубликована: Фев. 21, 2024

Язык: Английский

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Recent advances in carbon-based anodes for high-performance sodium-ion batteries: Mechanism, modification and characterizations

Materials Today, Год журнала: 2024, Номер 75, С. 334 - 358

Опубликована: Май 9, 2024

Язык: Английский

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Oxygen-driven closing pore formation in coal-based hard carbon for low-voltage rapid sodium storage

Chemical Engineering Journal, Год журнала: 2024, Номер 493, С. 152389 - 152389

Опубликована: Май 26, 2024

Язык: Английский

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Molecular Engineering to Regulate the Pseudo‐Graphitic Structure of Hard Carbon for Superior Sodium Energy Storage

Small, Год журнала: 2024, Номер 20(34)

Опубликована: Апрель 9, 2024

Abstract Resin‐derived hard carbons have shown great advantages in serving as promising anode materials for sodium‐ion batteries due to their flexible microstructure tunability. However, it remains a daunting challenge rationally regulate the pseudo‐graphitic crystallite and defect of carbon toward advanced sodium storage performance. Herein, molecular engineering strategy is demonstrated modulate cross‐linking degree phenolic resin thus optimize carbon. Remarkably, resorcinol endows with moderate degree, which can finely tune structure enlarged interlayer spacing restricted surface defects. As consequence, optimal delivers notable reversible capacity 334.3 mAh g −1 at 0.02 A , high initial Coulombic efficiency 82.1%, superior rate performance 103.7 2 excellent cycling durability over 5000 cycles. Furthermore, kinetic analysis situ Raman spectroscopy are performed reveal electrochemical advantage mechanism. This study fundamentally sheds light on design resin‐based advance energy scale‐up applications.

Язык: Английский

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Recent advances of tailoring defects and pores in hard carbon for sodium storage

Materials Today Energy, Год журнала: 2024, Номер 40, С. 101501 - 101501

Опубликована: Янв. 13, 2024

Язык: Английский

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