Large-scale manufacturing sulfide superionic conductor for advancing all-solid-state batteries

Matter, Journal Year: 2025, Volume and Issue: unknown, P. 102135 - 102135

Published: April 1, 2025

Language: Английский

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Self-Pressure Silicon–Carbon Anodes for Low-External-Pressure Solid-State Li-Ion Batteries

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Although a high stack pressure (≥50 MPa) enhances solid-solid contacts in solid-state batteries (SSBs), it poses impracticality for commercialization. This work proposes self-pressure silicon (Si)-carbon composite anode that enables stable operation under reduced external (≤2 MPa). The features prestress structure can effectively alleviate the internal and stress simultaneously, which is fabricated with ionic-conductive poly(ethylene oxide) (PEO)/lithium salt-coated carbon nanotubes (CNTs) being compressed by shrinking graphene hydrogel. capillary-driven hydrogel shrinkage generates pressure, compensating volumetric expansion (up to 300%) of Si. creates dynamic interfaces between CNTs/PEO expanding Si, ensuring both mechanical stability ion/electron transport. SSBs this have long cycle life 700 cycles capacity retention 79.2% an organic/inorganic electrolyte without (0 half-cell using sulfide reached was able achieve at lowest 2 MPa pressure. design resolves interfacial challenges SSBs.

Language: Английский

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Long‐Term Cycling Stability and Dendrite Suppression in Garnet‐Type Solid‐State Lithium Batteries via Plasma‐Induced Artificial SEI Layer Formation

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Abstract The garnet‐based solid‐state‐electrolyte Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO) faces challenges due to its poor contact with Li‐metal, resulting in high interfacial‐resistance and dendrite growth. To address this, an SnO 2 ‐Al (SA) ultra‐thin film on LLZTO is fabricated using direct‐current/radio‐frequency plasma magnetron co‐sputtering. This modification layer reacts molten situ form a dense continuous artificial solid‐electrolyte‐interphase (SEI) layer, composed of O, Li‐Al‐O, x Sn, 9 Al 4 alloy. Density‐functional‐theory calculations optical‐microscopy characterization confirm the effectiveness this interlayer improving interfacial‐modification. Consequently, ultrahigh critical‐current‐density 5.4 mA cm −2 achieved, effectively preventing lithium‐metal penetration into bulk electrolyte. symmetric cell SA SEI cycles stably for 8700 h without formation, significantly outperforming modified (only 1350 h) most interface layers reported literature, demonstrating excellent interfacial‐stability. Additionally, full cells LiFePO LiNi 0.8 Co 0.1 Mn cathodes exhibit stable cycling performance (LiFePO : 88.95% capacity retention at 400 th cycle C; 89.16% 200 C). work underscores significant potential co‐sputtering method creating layers, paving way practical application garnet‐type solid‐state batteries.

Language: Английский

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Dynamic Optical Wireless Power Transmission Infrastructure Configuration for EVs

Energies, Journal Year: 2025, Volume and Issue: 18(9), P. 2264 - 2264

Published: April 29, 2025

Electric vehicles (EVs) are becoming more widespread as we move toward a carbon-free society. However, challenges remain, such the need for large batteries, inconvenience of charging, and limited driving range. Dynamic optical wireless power transmission (D-OWPT) is considered promising solution to these problems. This paper investigates infrastructure configuration feasibility D-OWPT. To this end, model EV consumption was created, simulator D-OWPT developed. Using simulator, it shown that placing light sources in low-speed sections an effective method, continuous can be achieved by providing source with output about 20 kW, assuming 50% irradiation section ratio. Since many conditions used analysis achievable existing technologies, results demonstrate high While presented study based on simulation, modeling parameters, including OWPT system characteristics, derived from actual vehicle specifications experimental data reported research. Although does not include physical implementation, present numerically validated directly applicable practical design. work intended serve theoretical foundation future development prototyping infrastructure.

Language: Английский

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Anthraquinone Substituents Regulate the Ion-Transport Sites in iHOFs for Efficient Transport of Alkali-Metal Ions

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

The designability of crystalline framework materials holds promise for the development stable solid-state electrolytes with high ionic conductivity. In this study, we present three anthraquinone-based hydrogen-bonded organic frameworks (iHOF-21-23), which possess 2D sandwich-shaped hydrogen-bonding networks. By modulating anthraquinone substituents, iHOFs exhibit distinct ion-transport sites. Specifically, both carbonyls in structure iHOF-22 are sites, whereas only one carbonyl each iHOF-21 and iHOF-23 is, thus exhibits higher conductivities. conductivities Li+, Na+, K+ at 30 °C 1.37 × 10-4, 1.14 9.76 10-5 S cm-1, respectively, 16-47% than those iHOF-23. design multidimensional ion transport provides valuable insights various batteries.

Language: Английский

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