Gradient Lithium Metal Infusion in Ag-Decorated Carbon Fibers for High-Capacity Lithium Metal Battery Anodes

Nano Letters, Journal Year: 2023, Volume and Issue: 23(18), P. 8515 - 8523

Published: Sept. 5, 2023

Lithium (Li) metal is a promising anode material for high-energy-density Li batteries due to its high specific capacity. However, the uneven deposition of causes significant volume expansion and safety concerns. Here, we investigate impact gradient-infused Li-metal using silver (Ag)-decorated carbonized cellulose fibers (Ag@CC) as three-dimensional (3D) current collector. The loading level controlled by thermal infusion time molten Li. In particular, 5 s in Ag@CC collector creates an appropriate space with lithiophilic surface, resulting improved cycling stability reduced rate. Moreover, integrating high-capacity cathode demonstrates superior electrochemical performance minimal expansion. This suggests that 3D represents novel design strategy Li-metal-based Li-ion batteries.

Language: Английский

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Passivating lithium metal anode by anti-corrosion concentrated ether electrolytes for longevity of batteries

Nano Energy, Journal Year: 2024, Volume and Issue: 123, P. 109406 - 109406

Published: Feb. 16, 2024

Language: Английский

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Interface Engineering on Constructing Physical and Chemical Stable Solid‐State Electrolyte Toward Practical Lithium Batteries

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(4)

Published: Jan. 22, 2024

Solid‐state lithium batteries (SSLBs) with high safety have emerged to meet the increasing energy density demands of electric vehicles, hybrid and portable electronic devices. However, dendrite formation, interfacial resistance, deleterious reactions caused by solid–solid contact between electrode electrolyte hindered commercialization SSLBs. Thus, in this review, state‐of‐the‐art developments rational design solid‐state their progression toward practical applications are reviewed. First, origin interface instability sluggish charge carrier transportation presented. Second, various strategies stabilizing stability (reducing suppressing dendrites, side reactions) summarized from physical chemical perspective, including building protective layer, constructing 3D gradient structures, etc. Finally, remaining challenges future development trends prospected. This review provides a deep insight into solving issues promising solutions enable high‐energy‐density metal batteries.

Language: Английский

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A New Lithium Thioborate–Lithium Iodide Solid-State Electrolyte with High Ionic Conductivity for Lithium Metal Batteries

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1898 - 1906

Published: April 2, 2024

In the pursuit of high-performance solid-state batteries (SSBs), which can have excellent safety and energy density, it is critical to understand cyclability emerging classes electrolytes (SSEs). Lithium thioborates (LBS) are an understudied class materials with promising applications in SSBs lithium metal anodes. We investigate electrochemistry, structure, LBS SSE stoichiometric Li10B10S20 iodide (LiI) as additive. LBS-LiI exhibits outstanding ionic conductivity 1.0 mS cm–1 due increased crystallinity favorable modification grain boundaries LiI. LiI improves cycling stability against anodes, limits dendrite growth a high current density 2.0 mA cm–2, cycles well cells LiNi0.6Mn0.2Co0.2O2 (NMC) 622 cathodes indium Our work highlights boundary solid demonstrates SSBs.

Language: Английский

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Cubic Iodide Li_xYI_3+x Superionic Conductors through Defect Manipulation for All‐Solid‐State Li Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(12)

Published: Jan. 20, 2024

Abstract Halide solid electrolytes (SEs) have attracted significant attention due to their competitive ionic conductivity and good electrochemical stability. Among typical halide SEs (chlorides, bromides, iodides), substantial efforts been dedicated chlorides or with iodide receiving less attention. Nevertheless, compared iodides both a softer Li sublattice lower reduction limit, which enable possess potentially high intrinsic anti‐reduction stability, respectively. Herein, we report new series of SEs: x YI 3+x ( =2, 3, 4, 9). Through synchrotron X‐ray/neutron diffraction characterizations theoretical calculations, revealed that the belong high‐symmetry cubic structure, can accommodate abundant vacancies. By manipulating defects in balanced Li‐ion concentration generated vacancies enables an optimized 1.04 × 10 −3 S cm −1 at 25 °C for 4 7 . Additionally, promising Li‐metal compatibility is demonstrated via (particularly all‐solid‐state Li‐S batteries) combined interface molecular dynamics simulations. Our study on provides deep insights into relation between structures conduction, inspire future revitalize SEs.

Language: Английский

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A Dielectric MXene‐Induced Self‐Built Electric Field in Polymer Electrolyte Triggering Fast Lithium‐Ion Transport and High‐Voltage Cycling Stability

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(25)

Published: April 13, 2024

Abstract Quasi‐solid polymer electrolyte (QPE) lithium (Li)‐metal battery holds significant promise in the application of high‐energy‐density batteries, yet it suffers from low ionic conductivity and poor oxidation stability. Herein, a novel self‐built electric field (SBEF) strategy is proposed to enhance Li + transportation accelerate degradation dynamics carbon‐fluorine bond cleavage LiTFSI by optimizing termination MXene. Among them, SBEF induced dielectric Nb 4 C 3 F 2 MXene effectively constructs highly conductive LiF‐enriched SEI CEI stable interfaces, moreover, enhances electrochemical performance QPE. The related Li‐ion transfer mechanism dual‐reinforced interface are thoroughly investigated using ab initio molecular dynamics, COMSOL, XPS depth profiling, ToF‐SIMS. This comprehensive approach results high 1.34 mS cm −1 , leading small polarization approximately 25 mV for Li//Li symmetric cell after 6000 h. Furthermore, enables prolonged cycle life at voltage up 4.6 V. Overall, this work not only broadens QPE but also inspires great potential QPE‐based high‐voltage batteries.

Language: Английский

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Dual-functional vinylpyrrolidone electrolyte additive as anode surface leveler and cathode catalyst for lithium Metal-Oxygen batteries

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 458, P. 141383 - 141383

Published: Jan. 9, 2023

Language: Английский

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Li metal anode interface in sulfide‐based all‐solid‐state Li batteries

EcoMat, Journal Year: 2023, Volume and Issue: 5(8)

Published: June 1, 2023

Abstract Sulfide solid electrolyte (SSE)‐based all‐solid‐state Li batteries (ASSLBs) can overcome the problems of low energy density and safety concern current Li‐ion batteries. However, practical application SSE‐based ASSLBs is suffered from several problems, especially interfacial issues between metal anode (LMA) SSEs. Therefore, in this study, LMA–SSE interface their corresponding solutions are reviewed. First, summarized, namely side reactions SSEs, dendrite growth, poor contact electrode electrolyte. Second, available strategies to improve robustness discussed, including protection LMA, substitution modification Third, characterization methods used analyze morphological compositional evolution during cycling introduced. Finally, limitations future research directions proposed. image

Language: Английский

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Design of thin solid-state electrolyte films for safe and energy-dense batteries

Materials Today, Journal Year: 2023, Volume and Issue: 72, P. 235 - 254

Published: Dec. 18, 2023

The demand for high-performance electric vehicle (EV) batteries, specifically all-solid-state lithium batteries (ASSLBs), has been on the rise. Although notable advancements have taken place, there's still a noticeable gap to achieve targets set by U.S. Department of Energy (DOE). Designing and fabricating thin solid-state electrolytes (SSEs) are crucial high energy densities boost practical application ASSLBs. However, thickness reduction in SSEs introduces challenges such as heightened risk dendrite growth. This review focuses reducing density overall efficiency Strategies optimizing manufacturing processes SSE films enhancing mechanical strength ion conductivity at room temperature critically reviewed. highlights cost-effective scalable methods produce SSEs, discusses future opportunities this burgeoning area, ranging from fundamental research applications, further accelerate transition conventional lithium-ion

Language: Английский

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Air‐Stable Li₂S Cathodes Enabled by an In Situ‐Formed Li⁺ Conductor for Graphite‐Li₂S Pouch Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(14)

Published: Jan. 4, 2024

Using Li

Language: Английский

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