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  • Wiley  (4)
  • Physics  (4)
  • 1
    Online Resource
    Online Resource
    Single‐Layer‐Particle Electrode Design for Practical Fast‐Charging Lithium‐Ion Batteries
    Wiley ; 2022
    In:  Advanced Materials Vol. 34, No. 39 ( 2022-09)
    Details
    In: Advanced Materials, Wiley, Vol. 34, No. 39 ( 2022-09)
    Abstract: Efforts to enable fast charging and high energy density lithium‐ion batteries (LIBs) are hampered by the trade‐off nature of the traditional electrode design: increasing the areal capacity usually comes with sacrificing the fast charge transfer. Here a single‐layer chunky particle electrode design is reported, where red‐phosphorus active material is embedded in nanochannels of vertically aligned graphene (red‐P/VAG) assemblies. Such an electrode design addresses the sluggish charge transfer stemming from the high tortuosity and inner particle/electrode resistance of traditional electrode architectures consisting of randomly stacked active particles. The vertical ion‐transport nanochannels and electron‐transfer conductive nanowalls of graphene confine the direction of charge transfer to minimize the transfer distance, and the incomplete filling of nanochannels in the red‐P/VAG composite buffers volume change locally, thus avoiding the variation of electrodes thickness during cycling. The single‐layer chunky particle electrode displays a high areal capacity (5.6 mAh cm −2 ), which is the highest among the reported fast‐charging battery chemistries. Paired with a high‐loading LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode, a pouch cell shows stable cycling with high energy and power densities. Such a single‐layer chunky particle electrode design can be extended to other advanced battery systems and boost the development of LIBs with fast‐charging capability and high energy density.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v34.39
    DOI: 10.1002/adma.202202892
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1474949-X
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  • 2
    Online Resource
    Online Resource
    Greatly Enhanced Resonant Exciton‐Trion Conversion in Electrically Modulated Atomically Thin WS 2 at Room Temperature
    Wiley ; 2023
    In:  Advanced Materials Vol. 35, No. 33 ( 2023-08)
    Details
    In: Advanced Materials, Wiley, Vol. 35, No. 33 ( 2023-08)
    Abstract: Excitonic resonance in atomically thin semiconductors offers a favorite platform to study 2D nanophotonics in both classical and quantum regimes and promises potentials for highly tunable and ultra‐compact optical devices. The understanding of charge density dependent exciton‐trion conversion is the key for revealing the underlaying physics of optical tunability. Nevertheless, the insufficient and inefficient light‐matter interactions hinder the observation of trionic phenomenon and the development of excitonic devices for dynamic power‐efficient electro‐optical applications. Here, by engaging an optical cavity with atomically thin transition metal dichalcogenides (TMDCs), greatly enhanced exciton‐trion conversion is demonstrated at room temperature (RT) and achieve electrical modulation of reflectivity of ≈40% at exciton and 7% at trion state, which correspondingly enables a broadband large phase tuning in monolayer tungsten disulfide. Besides the absorptive conversion, ≈100% photoluminescence conversion from excitons to trions is observed at RT, illustrating a clear physical mechanism of an efficient exciton‐trion conversion for extraordinary optical performance. The results indicate that both excitons and trions can play significant roles in electrical modulation of the optical parameters of TMDCs at RT. The work shows the real possibility for realizing electrical tunable and multi‐functional ultra‐thin optical devices using 2D materials.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v35.33
    DOI: 10.1002/adma.202302248
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1474949-X
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  • 3
    Online Resource
    Online Resource
    Stable and Solution‐Processable Cumulenic sp‐Carbon Wires: A New Paradigm for Organic Electronics
    Wiley ; 2022
    In:  Advanced Materials Vol. 34, No. 15 ( 2022-04)
    Details
    In: Advanced Materials, Wiley, Vol. 34, No. 15 ( 2022-04)
    Abstract: Solution‐processed, large‐area, and flexible electronics largely relies on the excellent electronic properties of sp 2 ‐hybridized carbon molecules, either in the form of π‐conjugated small molecules and polymers or graphene and carbon nanotubes. Carbon with sp‐hybridization, the foundation of the elusive allotrope carbyne, offers vast opportunities for functionalized molecules in the form of linear carbon atomic wires (CAWs), with intriguing and even superior predicted electronic properties. While CAWs represent a vibrant field of research, to date, they have only been applied sparingly to molecular devices. The recent observation of the field‐effect in microcrystalline cumulenes suggests their potential applications in solution‐processed thin‐film transistors but concerns surrounding the stability and electronic performance have precluded developments in this direction. In the present study, ideal field‐effect characteristics are demonstrated for solution‐processed thin films of tetraphenyl[3]cumulene, the shortest semiconducting CAW. Films are deposited through a scalable, large‐area, meniscus‐coating technique, providing transistors with hole mobilities in excess of 0.1 cm 2  V −1  s −1 , as well as promising operational stability under dark conditions. These results offer a solid foundation for the exploitation of a vast class of molecular semiconductors for organic electronics based on sp‐hybridized carbon systems and create a previously unexplored paradigm.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v34.15
    DOI: 10.1002/adma.202110468
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1474949-X
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  • 4
    Online Resource
    Online Resource
    Liquid Metal Loaded Molecular Sieve: Specialized Lithium Dendrite Blocking Filler for Polymeric Solid‐State Electrolyte
    Wiley ; 2024
    In:  Advanced Materials Vol. 36, No. 21 ( 2024-05)
    Details
    In: Advanced Materials, Wiley, Vol. 36, No. 21 ( 2024-05)
    Abstract: All‐solid–state lithium metal batteries (LMBs) are currently one of the best candidates for realizing the yearning high‐energy–density batteries with high safety. However, even polyethylene oxide (PEO), the most popular polymeric solid‐state electrolyte (SSE) with the largest ionic conductivity in the category so far, has significant challenges due to the safety issues of lithium dendrites, and the insufficient ionic conductivity. Herein, molecular sieve (MS) is integrated into the PEO as an inert filler with the liquid metal (LM) as a functional module, forming an “LM‐MS‐PEO” composite as both SSE with enhanced ionic conductivity, and protection layer against lithium dendrites. As demonstrated by theoretical and experimental investigations, LM released from MS can be uniformly and efficiently distributed in PEO, which could avoid agglomeration, enable the effective blocking of lithium dendrites, and regulate the mass transport of Li ions, thus achieving even deposition of lithium during charge/discharge. Moreover, MS could reduce the crystallinity of PEO, improve lithium‐ion conductivity, and reduce operating temperature. Benefiting from the introduction of the functional MS/LM, the LM‐MS‐PEO electrolyte exhibits fourfold higher lithium ionic conductivity than the pristine PEO at 40 °C, while the as‐assembled all‐solid–state LMBs have four to five times longer stable cycle life.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v36.21
    DOI: 10.1002/adma.202313456
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 1474949-X
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