Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic physicochemical property of electromagnetic wave absorption (EMWA) materials. However, relationship between configuration (EM) loss mechanism has remained elusive. Herein, drawing inspiration from DNA transcription process, we report successful synthesis novel situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA capability. Theoretical calculation EM simulation confirm that orbital coupling spin polarization Mn–N 4 –C configuration, along cross generated by structure, endow converters enhanced loss. As a result, HMC-8 demonstrates outstanding performance, achieving minimum reflection −63.13 dB at an ultralow thickness 1.29 mm. Through precise tuning graphite domain size, HMC-7 achieves effective bandwidth (EAB) 6.08 GHz 2.02 mm thickness. Furthermore, constructing macroscale gradient metamaterials enables ultrabroadband EAB 12.16 only 5.00 mm, maximum radar section reduction value reaching 36.4 m 2 . This innovative approach not advances understanding metal–nonmetal co-doping but also realizes broadband EMWA, thus contributing to development mechanisms applications.

Language: Английский

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Elucidating the construction and modulation of built-in electric field in the oxygen evolution reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152241 - 152241

Published: May 14, 2024

Language: Английский

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Using High‐Entropy Configuration Strategy to Design Spinel Lithium Manganate Cathodes with Remarkable Electrochemical Performance

Small, Journal Year: 2025, Volume and Issue: 21(7)

Published: Jan. 6, 2025

Abstract Owing to its abundant manganese source, high operating voltage, and good ionic diffusivity attributed 3D Li‐ion diffusion channels. Spinel LiMn 2 O 4 is considered a promising low‐cost positive electrode material in the context of reducing scarce elements such as cobalt nickel from advanced lithium‐ion batteries. However, rapid capacity degradation inadequate rate capabilities induced by Jahn–Teller distortion dissolution have limited large‐scale adoption spinel for decades. In this study, 1.98 Mg 0.005 Ti Sb Ce (HE‐LMO) with remarkable interfacial structural cycling stability developed based on complex concentrated doping strategy. The initial discharge retention HE‐LMO are 111.51 mAh g −1 90.55% after 500 cycles at 1 C. as‐prepared displays favorable stability, significantly surpassing pristine sample. Furthermore, theoretical calculations strongly support above finding. has higher more continuous density states Fermi energy level robust bonded electrons among Mn─O atom pairs. This research contributes field high‐entropy modification establishes facile strategy designing manganese‐based batteries (LIBs).

Language: Английский

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Enhanced CO2 Photoreduction in Pure Water Systems by Surface-Reconstructed Asymmetric Mn−Cu Sites

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124617 - 124617

Published: Sept. 1, 2024

Language: Английский

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Nano-rods in Ni-rich layered cathodes for practical batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(23), P. 11462 - 11518

Published: Jan. 1, 2024

The nano-rod structure is a promising approach for developing high performance cathode materials. This review discusses cathodes' origin, physicochemical, and electrochemical properties their application in next-generation batteries.

Language: Английский

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Synergistic enhancement of ion/electron transport by ultrafine nanoparticles and graphene in Li2FeTiO4/C/G nanofibers for symmetric Li-ion batteries

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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Mechano-Chemo-Electrochemically Booming Nickel-Rich Layered Cathode Electrochemical Performance

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

The practical application of nickel-rich layered transition metal oxide is hampered by its fast capacity decay, deriving from the side reactions with electrolyte, crack formation caused volume variation, and phase change near surface during charging/discharging processes. Here, we experimentally realize mechano-chemo-electrochemical coupling effect nanolayer on to greatly improve electrochemical performance. According detailed atomic structure analysis, this facilitates consuming residual lithium left oxide, suppressing reducing due variation long-term cycles. This design plays an in mechanical, chemical, aspects simultaneously which beneficial for their development.

Language: Английский

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In Situ Constructed Spinel Layer Stabilized Upcycled LiCoO₂ for High Performance Lithium‐Ion Batteries

Small, Journal Year: 2024, Volume and Issue: 20(34)

Published: May 5, 2024

With ever-increasing requirements for cathodes in the lithium-ion batteries market, an efficiency and eco-friendly upcycling regeneration strategy is imperative to meet demand high-performance cathode materials. Herein, a facile, direct proposed restore failed LiCoO

Language: Английский

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Aluminum-distribution-dependent microstructural evolution of NCA cathodes: Is aluminum homogeneity really favorable?

Energy storage materials, Journal Year: 2024, Volume and Issue: 70, P. 103496 - 103496

Published: May 22, 2024

Language: Английский

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Synergistic improvement of the sulfur redox reaction by MOF-driven dual-defect polyhedral Mn-doped Co1-xS embedded in an N-doped carbon composite host for practical lithium-sulfur batteries

Electrochimica Acta, Journal Year: 2024, Volume and Issue: 506, P. 145070 - 145070

Published: Sept. 16, 2024

Language: Английский

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