Engineering the Structural Uniformity of Gel Polymer Electrolytes via Pattern‐Guided Alignment for Durable, Safe Solid‐State Lithium Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: June 3, 2023

Ultrathin and super-toughness gel polymer electrolytes (GPEs) are the key enabling technology for durable, safe, high-energy density solid-state lithium metal batteries (SSLMBs) but extremely challenging. However, GPEs with limited uniformity continuity exhibit an uneven Li+ flux distribution, leading to nonuniform deposition. Herein, a fiber patterning strategy developing engineering ultrathin (16 µm) fibrous high ionic conductivity (≈0.4 mS cm-1 ) superior mechanical toughness (≈613%) durable safe SSLMBs is proposed. The special patterned structure provides fast transport channels tailoring solvation of traditional LiPF6 -based carbonate electrolyte, rapid transfer kinetics uniform flux, boosting stability against Li anodes, thus realizing ultralong plating/stripping in symmetrical cell over 3000 h at 1.0 mA cm-2 , mAh . Moreover, LiFePO4 loading 10.58 mg deliver stable cycling life 1570 cycles C 92.5% capacity retention excellent rate 129.8 g-1 5.0 cut-off voltage 4.2 V (100% depth-of-discharge). Patterned systems powerful strategies producing SSLMBs.

Language: Английский

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Accelerated Li⁺ Desolvation for Diffusion Booster Enabling Low‐Temperature Sulfur Redox Kinetics via Electrocatalytic Carbon‐Grazfted‐CoP Porous Nanosheets

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(36)

Published: May 19, 2023

Abstract Lithium–sulfur (Li–S) batteries are famous for their high energy density and low cost, but prevented by sluggish redox kinetics of sulfur species due to depressive Li ion diffusion kinetics, especially under low‐temperature environment. Herein, a combined strategy electrocatalysis pore sieving effect is put forward dissociate the + solvation structure stimulate free diffusion, further improving reaction kinetics. As protocol, an electrocatalytic porous diffusion‐boosted nitrogen‐doped carbon‐grafted‐CoP nanosheet designed via forming NCoP active release more react with species, as fully investigated electrochemical tests, theoretical simulations in situ/ex situ characterizations. result, cells booster achieve desirable lifespan 800 cycles at 2 C excellent rate capability (775 mAh g −1 3 C). Impressively, condition mass loading or environment, cell 5.7 mg cm −2 stabilizes areal capacity 3.2 charming 647 obtained 0 °C after 80 cycles, demonstrating promising route providing ions toward practical high‐energy Li–S batteries.

Language: Английский

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Interfacial “Single‐Atom‐in‐Defects” Catalysts Accelerating Li⁺ Desolvation Kinetics for Long‐Lifespan Lithium‐Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(39)

Published: June 21, 2023

Abstract The lithium‐metal anode is a promising candidate for realizing high‐energy‐density batteries owing to its high capacity and low potential. However, several rate‐limiting kinetic obstacles, such as the desolvation of Li + solvation structure liberate , 0 nucleation, atom diffusion, cause heterogeneous spatial Li‐ion distribution fractal plating morphology with dendrite formation, leading Coulombic efficiency depressive electrochemical stability. Herein, differing from pore sieving effect or electrolyte engineering, atomic iron anchors cation vacancy‐rich Co 1− x S embedded in 3D porous carbon (SAFe/CVRCS@3DPC) proposed demonstrated catalytic promoters. Numerous free ions are electrocatalytically dissociated complex uniform lateral diffusion by reducing barriers via SAFe/CVRCS@3DPC, smooth dendrite‐free morphologies, comprehensively understood combined situ/ex situ characterizations. Encouraged SAFe/CVRCS@3DPC promotor, modified Li‐metal anodes achieve long lifespan (1600 h) without any formation. Paired LiFePO 4 cathode, full cell (10.7 mg cm −2 ) stabilizes retention 90.3% after 300 cycles at 0.5 C, signifying feasibility using interfacial catalysts modulating behaviors toward practical applications.

Language: Английский

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Toward Low‐Temperature Zinc‐Ion Batteries: Strategy, Progress, and Prospect in Vanadium‐Based Cathodes

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(8)

Published: Dec. 28, 2023

Abstract Low‐temperature vanadium‐based zinc ion batteries (LT‐VZIBs) have attracted much attention in recent years due to their excellent theoretical specific capacities, low cost, and electrochemical structural stability. However, working temperature surrounding often results retarded transport not only the frozen aqueous electrolyte, but also at/across cathode/electrolyte interface inside cathode interior, significantly limiting performance of LT‐VZIBs for practical applications. In this review, a variety strategies solve these issues, mainly including interface/bulk structure engineering electrolyte optimizations, are categorially discussed systematically summarized from design principles in‐depth characterizations mechanisms. end, several issues about future research directions advancements characterization tools prospected, aiming facilitate scientific commercial development LT‐VZIBs.

Language: Английский

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Screening of transition metal oxides for electrocatalytic nitrate reduction to ammonia at large currents

Nano Research, Journal Year: 2024, Volume and Issue: 17(5), P. 3902 - 3910

Published: Jan. 12, 2024

Language: Английский

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Engineering a Dynamic Solvent‐Phobic Liquid Electrolyte Interphase for Long‐Life Lithium Metal Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 25, 2024

Abstract The heterogeneity, species diversity, and poor mechanical stability of solid electrolyte interphases (SEIs) in conventional carbonate electrolytes result the irreversible exhaustion lithium (Li) during cycling, hindering practical applications Li metal batteries (LMBs). Herein, this work proposes a solvent‐phobic dynamic liquid interphase (DLEI) on (Li–PFbTHF (perfluoro‐butyltetrahydrofuran)) surface that selectively transports salt induces salt‐derived SEI formation. DLEI with C–F‐rich groups dramatically reduces side reactions between Li, solvents, humid air, forming LiF/Li 3 PO 4 ‐rich SEI. In situ electrochemical impedance spectroscopy Ab‐initio molecular dynamics demonstrate effectively stabilizes interface electrolyte. Specifically, LiFePO ||Li–PFbTHF cells deliver 80.4% capacity retention after 1000 cycles at 1.0 C, excellent rate (108.2 mAh g −1 5.0 C), 90.2% 550 C full‐cells (negative/positive (N/P) ratio 8) high loadings (15.6 mg cm −2 ) addition, 0.55 Ah pouch cell 252.0 Wh kg delivers stable cycling. Hence, study provides an effective strategy for controlling to improve cycling performances carbonate‐based LMBs.

Language: Английский

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3D Host Design Strategies Guiding “Bottom–Up” Lithium Deposition: A Review

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(19)

Published: March 1, 2024

Abstract Lithium metal batteries (LMBs) have the potential to be next‐generation rechargeable due high theoretical specific capacity and lowest redox of lithium metal. However, practical application LMBs is hindered by challenges such as uncontrolled growth dendrites, unstable solid electrolyte interphase (SEI), excessive volume change Li To solve these issues, design high‐performance anodes (LMAs) with various 3D structures critical. Targeting at realizing “bottom–up” deposition fully utilize architecture, in recent years, strategies gradient host materials construction, magnetic field modulation, SEI component design, so on attracted intensive attention. This review begins a fundamental discussion nucleation mechanism. The advances aspects construction modification methods that enable within advanced materials, particular emphasize their principles are comprehensively overviewed. Finally, future perspectives hosts toward LMAs proposed.

Language: Английский

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Interface engineering of MXene-based heterostructures for lithium-sulfur batteries

Nano Research, Journal Year: 2023, Volume and Issue: 16(7), P. 9158 - 9178

Published: May 25, 2023

Language: Английский

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Towards establishing uniform metrics for evaluating the safety of lithium metal batteries

Advanced Powder Materials, Journal Year: 2023, Volume and Issue: 2(4), P. 100139 - 100139

Published: May 22, 2023

Lithium metal batteries (LMBs) with ultra-high theoretical energy densities are regarded as excellent candidates for the next storage devices. Unfortunately, there many factors can cause temperature of LMBs to exceed a safe range and trigger thermal runaway. Countless effort has been invested in designing components realize application LMBs. However, most studies only focus on one single aspect since is no uniform metrics evaluating safety Herein, this review comprehensively summarizes all runaway proposes complete A comprehensive overview development provided discuss gap between practical applications. Finally, future directions academic research proposed according challenges existing current studies.

Language: Английский

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Promoting polysulfide conversions via cobalt single-atom catalyst for fast and durable lithium-sulfur batteries

Nano Research, Journal Year: 2023, Volume and Issue: 16(7), P. 9335 - 9343

Published: March 13, 2023

Language: Английский

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