Understanding the transport mechanism of lithium ions in solid-electrolyte interphase in lithium metal batteries with liquid electrolytes

Materials Today, Journal Year: 2024, Volume and Issue: 77, P. 39 - 65

Published: Aug. 1, 2024

Language: Английский

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Anion/Cation Solvation Engineering for a Ternary Low‐Concentration Electrolyte toward High‐Voltage and Long‐Life Sodium‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 25, 2024

Abstract High‐voltage sodium‐ion batteries (SIBs) are one of the most promising energy storage technologies for abundant resources and cost‐efficiency. However, their low density compared with lithium‐ion (LIBs) hinders practical applications. The high reactivity high‐voltage cathodes, primary factor, leads to deterioration electrode/electrolyte interphase. Herein, a novel anion/cation solvation strategy is innovatively proposed ternary low‐concentration electrolyte that tackles critical bottleneck unstable Especially, intermolecular interaction within as‐designed remodeled by weakly polar fluorinated co‐solvent (ethoxy(pentafluoro)cyclotriphosphazene, PFPN) traditional carbonate‐based electrolytes. PFPN can not only stabilize propylene carbonate (PC), reduce Na + ‐PC, ClO 4 − , accelerating desolvation, but also weaken anions form stable organic/inorganic composite cathode interphase (CEI). In this work, ionic conductivity increases 6.12 mS cm −1 oxidation stability successfully extended 4.84 V. And 3 V 2 (PO ) F (NVPF)||Na half‐cells present excellent cycling performance average coulombic efficiency 99.5% after 2000 cycles at 4.5 NVPF||hard carbon (HC) full cells relatively (≈450 Wh kg competitive commercial LIBs, which expected be coupled higher voltage cathodes achieve in future.

Language: Английский

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Restructuring Electrolyte Solvation by a Partially and Weakly Solvating Cosolvent toward High-Performance Potassium-Ion Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(19), P. 12512 - 12523

Published: May 3, 2024

Ether-based electrolytes are among the most important for potassium-ion batteries (PIBs) due to their low polarization voltage and notable compatibility with potassium metal. However, development is hindered by strong binding between K+ ether solvents, leading [K+–solvent] cointercalation on graphite anodes. Herein, we propose a partially weakly solvating electrolyte (PWSE) wherein local solvation environment of conventional 1,2-dimethoxyethane (DME)-based efficiently reconfigured diethoxy methane (DEM) cosolvent. For PWSE in particular, DEM participates shell weakens chelation DME, facilitating desolvation suppressing behavior. Notably, structure DME-based transformed into more cation–anion–cluster-dominated structure, consequently promoting thin stable solid–electrolyte interphase (SEI) generation. Benefiting from optimized SEI generation, enables electrode reversible (de)intercalation (for over 1000 cycles) K plating/stripping (the K||Cu cell an average Coulombic efficiency 98.72% 400 dendrite-free properties K||K operates 1800 h). We demonstrate that rational design provides approach tailoring toward PIBs.

Language: Английский

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Advanced Ether‐Based Electrolytes for Lithium‐ion Batteries

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

Published: July 14, 2024

Abstract Lithium‐ion batteries (LIBs) have emerged as vital elements of energy storage systems permeating every facet modern living, particularly in portable electronic devices and electric vehicles. However, with the sustained economic social development, new‐generation LIBs high density, wide operating temperature range, fast charge, safety are eagerly expected, while conventional ethylene carbonate (EC)‐based electrolytes fail to satisfy corresponding requirements. Comparatively, ether‐based electrolyte fascinating properties recently been revived fields, many advanced exciting performances under developed. This review provides an extensive overview latest breakthroughs concerning applied intercalation cathodes. To systematically outline progression electrolytes, this is categorized from perspective anodes follows: i) graphite anode‐based LIBs; ii) silicon iii) lithium metal LIBs.

Language: Английский

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A weakly coordinating-intervention strategy for modulating Na+ solvation sheathes and constructing robust interphase in sodium-metal batteries

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

Published: July 26, 2024

Constructing powerful anode/cathode interphases by modulate ion solvation structure is the principle of electrolyte design. However, methodological and theoretical design principles electrolyte/solvation their effect on electrochemical performance are still vague. Here, we propose a cationic weakly coordinating-intervention strategy for modulating Na+ sheathes constructing robust in sodium-metal batteries. Unlike local highly concentrated electrolytes, 1,2-difluorobenzene can coordinate with thus transforming into Na+-anion-incorporated structures strengthening formation combining salt decomposition. Furthermore, correlations between electrode interface properties revealed, which be tuned coordination. Ultimately, modulated achieves 97.5% Coulombic efficiency 600 cycles Na‖Cu cells at 1 mA cm−2 beneficial lifetime (2500 h) Na‖Na cells. Meanwhile, Na‖PB have achieved long-term operation 4.8 V, along wide temperatures. authors to sheath construct interphase Correlation also stated.

Language: Английский

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Ether-Based High-Voltage Lithium Metal Batteries: The Road to Commercialization

ACS Nano, Journal Year: 2024, Volume and Issue: 18(16), P. 10726 - 10737

Published: April 11, 2024

Ether-based high-voltage lithium metal batteries (HV-LMBs) are drawing growing interest due to their high compatibility with the Li anode. However, commercialization of ether-based HV-LMBs still faces many challenges, including short cycle life, limited safety, and complex failure mechanisms. In this Review, we discuss recent progress achieved in electrolytes for propose a systematic design principle electrolyte based on three important parameters: electrochemical performance, industrial scalability. Finally, summarize challenges commercial application suggest roadmap future development.

Language: Английский

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Synergistic Additives Enabling Stable Cycling of Ether Electrolyte in 4.4 V Ni‐Rich/Li Metal Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(51)

Published: Aug. 17, 2023

Abstract Ether‐based electrolytes have high ionic conductivity and good stability toward the lithium metal anode relative to carbonate‐based electrolytes, but they typically exhibit poor oxidation (<4 V vs Li + /Li). Most approaches aimed at enhancing oxidative of ether‐based such as “salt‐in‐solvent” “weakly solvating” strategies, often sacrifice their inherent advantage conductivity. Herein, this article proposes a cost‐effective synergistic additive strategy by co‐adding LiNO 3 vinylene carbonate (VC) achieve an optimized electrolyte (OEE) that simultaneously offers Li‐ion (Li ) (11.52 mS cm −1 20 °C) high‐voltage (4.4 V). VC can enter inner solvation shell electrolyte, preferentially participating in film‐forming progress electrode surface, leading formation unique organic–inorganic bilayer interfacial protective layer. This layer could effectively suppress side reactions enhance stability. As result, 4.4 Li‐LiNi 0.8 Mn 0.1 Co O 2 (NCM811) full cells assembled with OEE stable cycling performance both room temperature low temperature. work provides new approach design for batteries.

Language: Английский

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Impact of the fluorination degree of ether-based electrolyte solvents on Li-metal battery performance

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 12(5), P. 2986 - 2993

Published: Dec. 7, 2023

Electrolytes using fluorinated solvents have proven effective in improving the cycling life of Li-metal batteries, by forming a robust solid–electrolyte interphase through decomposition anion and solvent molecules.

Language: Английский

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A Quasi‐Solid‐State Polyether Electrolyte for Low‐Temperature Sodium Metal Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(48)

Published: July 19, 2023

Abstract Taken the unlimited Na reservoir worldwide, battery technology based on Na‐ion chemistry poses as an ideal candidate for large‐scale energy storage systems. Especially, with metallic replacing traditional carbon anodes, it's able to maximize density inexpensively. Nevertheless, sodium metal batteries (SMBs) face intrinsically poor stability due their highly‐reactive nature, where low Coulombic efficiency and short lifetime are often witnessed. The situation can be further aggravated at temperatures insurmountable kinetic barriers. Herein, a 1,3‐dioxolane‐based quasi‐solid‐state electrolyte (PDGE) is proposed high ionic conductivity of 3.68 mS cm −1 even −20 ◦ C SMBs. Moreover, weak solvation environment tailored by PDGE, which possesses + transference number 0.7. Concurrently, solid interphase induced from PDGE presents inorganic 2 O, NaF major components, offers accelerated diffusion superior upon long‐term cycling. With such electrolyte, Na/Na 3 V (PO 4 ) full cell exhibits great over 1000 cycles C. This study has significant implications development SMBs under low‐temperature conditions.

Language: Английский

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Review of MOF-guided ion transport for lithium metal battery electrolytes

Nano Energy, Journal Year: 2024, Volume and Issue: 125, P. 109571 - 109571

Published: April 4, 2024

Language: Английский

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