Dissociation mechanism of lithium salt by BaTiO3 with spontaneous polarization

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(11), P. 3797 - 3806

Published: Jan. 1, 2024

We elucidate the dissociation mechanism of LiFSI induced by ferroelectric fillers BaTiO 3 and enhanced spontaneous polarization oxygen vacancy defects.

Language: Английский

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Interface engineering enabling thin lithium metal electrodes down to 0.78 μm for garnet-type solid-state batteries

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 15, 2024

Abstract Controllable engineering of thin lithium (Li) metal is essential for increasing the energy density solid-state batteries and clarifying interfacial evolution mechanisms a negative electrode. However, fabricating electrode faces significant challenges due to fragility high viscosity Li metal. Herein, through facile treatment Ta-doped 7 La 3 Zr 2 O 12 (LLZTO) with trifluoromethanesulfonic acid, its surface CO species converted into lithiophilic layer LiCF SO LiF components. It enables thickness control electrodes, ranging from 0.78 μm 30 μm. Quasi-solid-state lithium-metal battery an optimized 7.54 μm-thick electrode, commercial LiNi 0.83 Co 0.11 Mn 0.06 positive negative/positive capacity ratio 1.1 shows 500 cycles lifespan final discharge specific 99 mAh g −1 at 2.35 mA cm −2 25 °C. Through multi-scale characterizations we clarify multi-dimensional compositional failure lithium-deficient -rich regions (0.78 μm), on surface, inside it, or Li/LLZTO interface.

Language: Английский

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Infrared nanoimaging and nanospectroscopy of electrochemical energy storage materials and interfaces

Current Opinion in Electrochemistry, Journal Year: 2024, Volume and Issue: 47, P. 101548 - 101548

Published: June 3, 2024

Electrochemical interfaces are central to the function and performance of energy storage devices. Thus, development new methods characterize these interfaces, in conjunction with electrochemical performance, is essential for bridging existing knowledge gaps accelerating technologies. Of particular need ability surfaces or a non-destructive way adequate resolution discern individual structural chemical building blocks. To this end, sub-diffraction-limit low-energy optical probes that exploit near-field interactions, such as pseudoheterodyne imaging, photothermal AFM-IR, nanoscale Fourier transform infrared spectroscopy, powerful emerging techniques. These capable surface probing imaging at nanometer resolution. This review outlines recent efforts ex situ electrode materials rechargeable batteries probes.

Language: Английский

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Recent Progress in Gel Polymer Electrolyte for Lithium Metal Batteries

Giant, Journal Year: 2024, Volume and Issue: 20, P. 100337 - 100337

Published: Aug. 23, 2024

Language: Английский

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Nanowires for Solid‐State Lithium Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract A vital approach to accessing high‐safety and high‐energy‐density lithium batteries is develop solid‐state electrolytes (SSEs) instead of liquid electrolytes. However, lithium‐ion transport interface stability issues puzzle the construction (SSLBs). Thus, developing fast‐ionic conductors with high electrochemical performances chemical crucial SSLBs. Nanowires (NWs) possess aspect ratios for maintaining carrier along radial direction, thus being extensively employed in SSLBs enhancement ion efficiency, mechanical properties, thermostability, flame retardancy, between electrodes electrolytes, consequently boosting cycle safety In this work, advances NWs SSLBs, from rational design synthesis strategies applications composite cathodes, anode materials, SSEs are systematically reviewed. The key role mechanism SSE performance by introducing concluded detail. Finally, existing challenges anticipated prospects future development advanced nanowire‐based summarized demonstrated. This review aims provide a comprehensive understanding facilitate application

Language: Английский

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Enhancing cathode composites with conductive alignment synergy for solid-state batteries

Science Advances, Journal Year: 2025, Volume and Issue: 11(1)

Published: Jan. 3, 2025

Enhancing transport and chemomechanical properties in cathode composites is crucial for the performance of solid-state batteries. Our study introduces filler-aligned structured thick (FAST) electrode, which notably improves mechanical strength ionic/electronic conductivity solid composite cathodes. The FAST electrode incorporates vertically aligned nanoconducting carbon nanotubes within an ion-conducting polymer electrolyte, creating a low-tortuosity electron/ion path while strengthening electrode’s structure. This design not only mitigates recrystallization electrolyte but also establishes densified local electric field distribution accelerates migration lithium ions. showcases outstanding electrochemical with iron phosphate as active material, achieving high capacity 148.2 milliampere hours per gram at 0.2 C over 100 cycles substantial material loading (49.3 milligrams square centimeter). innovative marks remarkable stride addressing challenges metal

Language: Английский

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Gradient Design with Low‐tortuosity Overcoming Kinetic Limitations in High‐Loading Solid‐State Cathodes

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

The extensive commercialization of practical solid-state batteries (SSBs) necessitates the development high-loading cathodes with fast charging capability. However, electrochemical kinetics are severely delayed in thick due to tortuous ion transport pathways and slow solid-solid diffusion, which limit achievable capacity SSBs at high current densities. In this work, we propose a conductivity gradient cathode low-tortuosity enable facile counterbalance concentration gradient, thereby overcoming kinetic limitations achieving capabilities cathodes. LiNi0.8Co0.1Mn0.1O2 deliver room-temperature (RT) capacities 147 110 mAh g-1 5 C 10 C, respectively, meanwhile achieve RT areal 3.3 cm-2 3 enabling simultaneously energy power universality strategy is demonstrated LiFePO4 cathodes, providing novel solution for large-scale application SSBs.

Language: Английский

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Gradient Design with Low‐tortuosity Overcoming Kinetic Limitations in High‐Loading Solid‐State Cathodes

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Abstract The extensive commercialization of practical solid‐state batteries (SSBs) necessitates the development high‐loading cathodes with fast charging capability. However, electrochemical kinetics are severely delayed in thick due to tortuous ion transport pathways and slow solid‐solid diffusion, which limit achievable capacity SSBs at high current densities. In this work, we propose a conductivity gradient cathode low‐tortuosity enable facile counterbalance concentration gradient, thereby overcoming kinetic limitations achieving capabilities cathodes. LiNi 0.8 Co 0.1 Mn O 2 deliver room‐temperature (RT) capacities 147 110 mAh g −1 5 C 10 C, respectively, meanwhile achieve RT areal 3.3 cm −2 3 enabling simultaneously energy power universality strategy is demonstrated LiFePO 4 cathodes, providing novel solution for large‐scale application SSBs.

Language: Английский

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Room-Temperature Hybrid Solid Polymer Electrolytes Incorporating Poly(vinylidene fluoride-co-hexafluoropropylene), Ionic Liquids, and Ceramic Particles for Solid-State Batteries

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

Published: March 4, 2025

Language: Английский

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Enhanced Cycling Performance of High-Voltage Solid-State Lithium Batteries via In Situ Cathode–Electrolyte Interface Construction

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

Published: March 10, 2025

The [solvent-Li+] complex in poly(vinylidene fluoride) (PVDF)-based polymer electrolytes enables fast ion conduction but also makes it difficult to be compatible with high-voltage cathodes. Here, we demonstrate that the residual amount of solvent significantly affects transport properties and interfacial stability electrolyte. In LiNixCoyMnzO2/Li batteries, a nonuniform unstable double-layer CEI is formed due decomposition desolvated NMP molecules lithium salts, resulting aggravated polarization rapid capacity decay. Thus, difluorophosphate (LDFP) introduced as sacrificial additive into composite cathode construct situ robust protective layer. Computational experimental results indicate its strong adsorption on NCM surface helps form uniform inorganic-rich interface passivate catalytic sites NCM, thereby achieving stable long-term cycling solid-state batteries.

Language: Английский

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