Flexible, binder-free, freestanding silicon/oxidized carbon nanotubes composite anode for lithium-ion batteries with enhanced electrochemical performance through chemical reduction

Materials Science and Engineering B, Год журнала: 2025, Номер 313, С. 117971 - 117971

Опубликована: Янв. 8, 2025

Язык: Английский

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Silicon Nanoparticles Encapsulated within Multifunctional Double Carbon Matrices as Anodes for High‐Performance Lithium‐Ion Batteries

Energy Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Significant volume expansion and limited electrical conductivity pose substantial challenges to the practical application of silicon (Si). Herein, nanoparticles are incorporated into a dual‐carbon matrix co‐doped with nitrogen sulfur (N/S Si/G/C) using method that combines ball milling carbonization. The Si uniformly distributed between graphite layers encapsulated by an amorphous carbon layer N/S generated from pyrolysis pitch thiourea. This three‐dimensional structure not only effectively mitigates but also significantly enhances material's ionic electronic conductivity. Even at current density 1 A g −1 , capacity remains 625.87 mAh after 500 cycles, demonstrating exceptional cycling stability. When assembled full battery LiFePO 4 retains 158.9 200 corresponding retention 95.6%. In addition, is simple operate, highly adaptable versatile in function, does involve any toxic or harmful chemical substances, providing new idea for industrial production silicon–carbon anode materials.

Язык: Английский

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Advancement in Research on Silicon/Carbon Composite Anode Materials for Lithium-Ion Batteries

Metals, Год журнала: 2025, Номер 15(4), С. 386 - 386

Опубликована: Март 29, 2025

Silicon stands out as an exceptionally viable anode material, distinguished by its substantial capacity, plentiful natural reserves, eco-friendliness, and favorable low working potential. Nonetheless, the material’s pronounced volume fluctuations readily induce particle fragmentation, detachment of active components, repeated disruption solid electrolyte interphase (SEI) layer. These factors contribute to a shortened cycle life rapid capacity fading, thus hindering practical application. The carbon composite approach can efficiently counteract these issues capitalizing on silicon’s high employing cushioning agent diminish swelling, enhancing deployment silicon-based materials. This paper offers exhaustive examination lithiation processes involved in Si/C anodes delves into strategic utilization diverse materials, including graphite, graphene, graphdiyne, nanotubes, fibers, MXenes, pitch, heteroatom-doped polymers, biomass-derived carbon, carbon-containing gas-derived MOFs, g-C3N4 advance application silicon lithium-ion battery (LIB) anodes. Overall, this concentrates summarizing current research status technological advancement juxtaposes merits demerits various sources anodes, providing comprehensive assessment forward-looking perspective their future development.

Язык: Английский

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Enhancement of lithium-ion battery anodes performance by anchoring silicon–carbon nanofibers in porous biochar frameworks

Journal of Materials Science Materials in Electronics, Год журнала: 2025, Номер 36(10)

Опубликована: Апрель 1, 2025

Язык: Английский

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Eco-Efficient, Nonacidic Etched and Cost-Effective Micron-Sized Porous Si–C Anodes for High-Performance Li-Ion Batteries

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Язык: Английский

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Edge-Surface-Inter Carbon Nanoarchitecture on Silicon

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

The huge volume changes of silicon (Si) anodes during cycling lead to continuous solid electrolyte interphase thickening, mechanical failure, and loss electrical contact, which have become key bottlenecks limiting their practical applications. This work presents a trimodal in situ growth strategy for constructing hierarchical carbon nanoarchitecture networks on Si substrates (Si@Gr@CNT). designed "Edge-Surface-Inter" (E-S-I) architecture exhibits three synergistic features: an edge-protruding structure forming vertical conductive channels rapid Li+ transport, surface-entangled providing enhancement, interbridging three-dimensional electron transport networks. Si@Gr@CNT electrode demonstrates 63.2% improvement half-cell rate performance compared with traditional Si@Gr. E-S-I contributes suppressing excessive LiF formation through improved local current distribution, devoted the stable thinner layer. network possesses significant stress regulation effect, provides release space direction lateral buffering surface flexible entanglement. For applications, full cell assembled LiFePO4 cathode Si@Gr@CNT/graphite composite anode delivers high energy density enhanced durability. study establishes nanoarchitectures design insights into high-performance Si-based electrodes.

Язык: Английский

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Synergistic effect of Y2O3 and carbon coating of silicon anode achieved high stable lithium storage

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180641 - 180641

Опубликована: Апрель 1, 2025

Язык: Английский

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Constructing an enhanced charge-mass transfer passage for silicon anodes to achieve increased capacity under high-rate conditions

Energy Materials, Год журнала: 2025, Номер 5(8)

Опубликована: Апрель 28, 2025

Silicon (Si) holds promise as an anode material for next-generation lithium-ion batteries due to its high theoretical capacity. However, practical applications are impeded by structural damage from volume expansion. Here, we designed a novel Si/CNFs/C integrating mesoporous Si particles, carbon nanofibers (CNFs), and quantum dots into three-dimensional (3D) architecture via one-step magnesiothermic reduction process. This design significantly enhances both electron ion conductivity, alleviates the expansion of ensures mechanical stability during battery operation. Consequently, with exhibit reversible capacity 1,172.4 mAh g-1 after 200 cycles at 0.1 A maintain 1,107.7 1,000 1 g-1. Notably, current density g-1, remains nearly comparable that 100 attributed significant pseudocapacitive characteristics facilitate performance under elevated densities. Furthermore, employed distribution relaxation times analysis alongside other electrochemical techniques investigate changes in transport pathways evolving role energy storage Our provide valuable insights optimizing 3D conductive architectures understanding dynamic mechanisms Si-based anodes, advancing development high-performance batteries.

Язык: Английский

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Sulfur-doped carbon interface modification for high-performance silicon anodes in lithium-ion batteries

Materials Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

An interface modification of sulfur-doped carbon layers for silicon anodes was designed. The layer enhances the electronic conductivity electrodes, reduces energy barrier lithium-ion diffusion, and achieves excellent performance.

Язык: Английский

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