Dual Activation for Tuning N, S Co‐Doping in Porous Carbon Sheets Toward Superior Sodium Ion Storage

Small, Год журнала: 2024, Номер 20(24)

Опубликована: Янв. 4, 2024

Abstract Porous carbon has been widely focused to solve the problems of low coulombic efficiency (ICE) and multiplication capacity Sodium‐ion batteries (SIBs) anodes. The superior energy storage properties two‐dimensional(2D) nanosheets can be realized by modulating structure, but limited sources, making it challenging obtain 2D structures with large surface area. In this work, a new method for forming materials high N/S doping content based on combustion activation using dual effect K 2 SO 4 /KNO 3 is proposed. synthesized material as an anode SIBs reversible 344.44 mAh g −1 at 0.05 A . Even current density 5 Ag , remained 143.08 And ICE sodium‐ion in ether electrolytes ≈2.5 times higher than that ester electrolytes. sodium mechanism ether/ester‐based further explored through ex‐situ characterizations. disparity electrochemical performance ascribed discrepancy kinetics, wherein ether‐based exhibit rate Na + shedding compared ester‐based This work suggests effective way develop doubly doped SIBs.

Язык: Английский

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In-situ capture defects through molecule grafting assisted in coal-based hard carbon anode for sodium-ion batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151428 - 151428

Опубликована: Апрель 25, 2024

Язык: Английский

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Biomimetic-Mineralization-Assisted Self-Activation Creates a Delicate Porous Structure in Carbon Material for High-Rate Sodium Storage

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Апрель 26, 2024

Porous carbons have shown their potential in sodium-ion batteries (SIBs), but the undesirable initial Coulombic efficiency (ICE) and rate capability hinder practical application. Herein, learning from nature, we report an efficient method for fabricating a carbon framework (CK) with delicate porous structural regulation by biomimetic mineralization-assisted self-activation. The abundant pores defects of CK anode can improve ICE performance SIBs ether-based electrolytes, whereas they are confined carbonate ester-based electrolytes. Notably, electrolytes enable to possess excellent (82.9%) high-rate (111.2 mAh g-1 at 50 A g-1). Even after 5500 cycles large current density 10 g-1, capacity retention still be maintained 73.1%. More importantly, full cell consisting Na3V2(PO4)3 cathode delivers high energy 204.4 Wh kg-1, power 2828.2 W kg-1. Such outstanding is attributed (1) hierarchical pores, oxygen doping, that pave way transportation storage Na+, further enhancing ICE; (2) high-proportion NaF-based solid-electrolyte-interphase (SEI) layer facilitates Na+ kinetics electrolytes; (3) determine dominate SIBs. These results provide compelling evidence promising our synthetic strategy development carbon-based materials electrochemical storage.

Язык: Английский

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Liquid template synergizing combustion activation to construct vesicular porous carbon anode for sodium ion batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154900 - 154900

Опубликована: Авг. 23, 2024

Язык: Английский

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Biomimetic mineralization coupling with seeds-induced foaming for optimizing carbon microstructure towards ultrafast sodium ion storage

Journal of Power Sources, Год журнала: 2024, Номер 613, С. 234875 - 234875

Опубликована: Июнь 18, 2024

Язык: Английский

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High capacity and long service in sodium-ion batteries achieved by the refinement of BiOCl from lamellar to flower-like in ether electrolyte

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151346 - 151346

Опубликована: Апрель 16, 2024

Sodium-ion batteries (SIBs) have emerged as a promising contender in power systems owing to their cost-effectiveness and safety advantages. However, alloy-type anode materials, crucial for SIB performance, often face challenges such significant volume expansion rapid capacity decay at high current densities. In this study, an ion-exchange strategy is used fabricate ultra-thin porous BiOCl nanosheets (UTP NS) material SIB. Remarkably, lamellar UTP NSs can transform flower-like shape ether electrolytes. This structural change beneficial shortening the Na+ transport path, which facilitates electrolyte entry enhances dynamic behavior of SIBs. Electrochemically, NS demonstrates exceptional 212.4 mAh/g service stability up 3000 cycles density 5 A/g, showcasing durability application potential. Furthermore, full-cell, coupled with Na3V2(PO4)3 cathode anode, enables outstanding sodium storage 140.5 powers 3 W bulb. research provides strategic approach identifying suitable anodes aims inspire researchers focus on advancing materials

Язык: Английский

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Bi Nanospheres Embedded in N‐Doped Carbon Nanowires Facilitate Ultrafast and Ultrastable Sodium Storage

Advanced Science, Год журнала: 2024, Номер 11(28)

Опубликована: Май 2, 2024

Abstract Sodium ion batteries (SIBs) are considered as the ideal candidates for next generation of electrochemical energy storage devices. The major challenges anode lie in poor cycling stability and sluggish kinetics attributed to inherent large Na + size. In this work, Bi nanosphere encapsulated N‐doped carbon nanowires (Bi@N‐C) is assembled by facile electrospinning carbonization. mitigates structure stress/strain during alloying/dealloying, optimizes ionic/electronic diffusion, provides fast electron transfer structural stability. Due excellent structure, Bi@N‐C shows performance SIBs terms good rate capacity half cells full cells. fundamental mechanism outstanding has been demonstrated through synchrotron in‐situ XRD, atomic force microscopy, ex‐situ scanning microscopy (SEM) density functional theory (DFT) calculation. Importantly, a deeper understanding underlying reasons improvement elucidated, which vital providing theoretical basis application SIBs.

Язык: Английский

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Revealing an Extended Adsorption/Insertion‐Filling Sodium Storage Mechanism in Petroleum Coke‐Derived Amorphous Carbon

Advanced Science, Год журнала: 2024, Номер 11(42)

Опубликована: Сен. 16, 2024

Abstract Amorphous carbon holds great promise as anode material for sodium‐ion batteries due to its cost‐effectiveness and good performance. However, sodium storage mechanism, particularly the insertion process origin of plateau capacity, remains controversial. Here, an extended adsorption/insertion‐filling mechanism is proposed using petroleum coke‐derived amorphous a multi‐microcrystalline model. Combining in situ X‐ray diffraction, Raman, theoretical calculations, neutron scattering, effective form location ions are revealed. The adsorption at defect sites leads high‐potential sloping capacity. occurs both pseudo‐graphite phase ( d 002 > 0.370 nm) graphite‐like (0.345 ≤ < rather than graphite phase, contributing low‐potential filling into accessible closed pores forms quasi‐metallic clusters, threshold interlayer spacing 0.345 nm, breaking consensus enhancing understanding pore filling. explains behavior with different microstructures, providing guidance rational design high‐performance anodes.

Язык: Английский

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Shape-persistent COF-derived functional carbon microspheres for No-carrier added 177Lu separation

Carbon, Год журнала: 2024, Номер 225, С. 119035 - 119035

Опубликована: Март 8, 2024

Язык: Английский

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Hollow ultra-microporous carbon spheres as high-rate anode nanomaterials for sodium-ion batteries

Electrochimica Acta, Год журнала: 2024, Номер 497, С. 144610 - 144610

Опубликована: Июнь 18, 2024

Язык: Английский

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