Emerging electrolytes with fluorinated solvents for rechargeable lithium-based batteries

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(8), P. 2713 - 2763

Published: Jan. 1, 2023

Electrolytes that can ensure the movement of ions and regulate interfacial chemistries for fast mass charge transfer are essential in many types electrochemical energy storage devices. However, emerging energy-dense lithium-based batteries, uncontrollable side-reactions consumption electrolyte result poor performances severe safety concerns. In this case, fluorination has been demonstrated to be one most effective strategies overcome above-mentioned issues without significantly contributing engineering technical difficulties. Herein, we present a comprehensive overview fluorinated solvents employed batteries. Firstly, basic parameters dictate properties solvents/electrolytes elaborated, including physical properties, solvation structure, interface chemistry, safety. Specifically, focus on advances scientific challenges associated with different enhancement their performance after fluorination. Secondly, discuss synthetic methods new reaction mechanisms depth. Thirdly, progress, structure-performance relationship, applications reviewed. Subsequently, provide suggestions solvent selection battery chemistries. Finally, existing further efforts summarized. The combination advanced synthesis characterization approaches assistance machine learning will enable design

Language: Английский

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Advanced polymer-based electrolytes in zinc–air batteries

eScience, Journal Year: 2022, Volume and Issue: 2(5), P. 453 - 466

Published: Sept. 1, 2022

Zinc–air batteries (ZABs) are expected to be some of the most promising power sources for wearable and portable electronic devices have received widespread research interest. As an ion conductor connecting anodes cathodes, electrolyte is critical overall performance ZABs (e.g., energy density, rechargeability, operating voltage). Compared with liquid electrolytes, polymer-based electrolytes superior characteristics ZABs, such as negligible leakage, three-phase interface stabilization, dendrite suppression. In this perspective, we focus on recent progress in ZABs. After a brief introduction emphasize development terms their intrinsic properties interfacial chemistry. Finally, challenges viable strategies proposed We hope that work will provide useful guidance spur high-performance based advanced electrolytes.

Language: Английский

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Nonflammable Polyfluorides‐Anchored Quasi‐Solid Electrolytes for Ultra‐Safe Anode‐Free Lithium Pouch Cells without Thermal Runaway

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: Sept. 6, 2023

The safe operation of rechargeable batteries is crucial because numerous instances fire and explosion mishaps. However, battery chemistry involving metallic lithium (Li) as the anode prone to thermal runaway in flammable organic electrolytes under abusive conditions. Herein, an situ encapsulation strategy proposed construct nonflammable quasi-solid through radical polymerization a hexafluorobutyl acrylate (HFBA) monomer pentaerythritol tetraacrylate (PETEA) crosslinker. system eliminates inherent flammability ether with zero self-extinguishing time owing gas-phase capturing ability HFBA. Additionally, graphitized carbon layer generated during decomposition PETEA at high temperatures obstructs heat oxygen required for combustion. When coupled Au-modified reduced graphene oxide anodic current collectors sulfide cathodes, assembled anode-free Li-metal cell based on electrolyte exhibits no signs expansion or gas generation cycling, eliminated multiple mechanical, electrical, abuse scenarios even rigorous strikes. This configuration gas- condensed-phase flame-retardant mechanisms can drive technological leap pouch cells secure practical applications necessary power this society manner.

Language: Английский

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Anion‐Reinforced Solvation for a Gradient Inorganic‐Rich Interphase Enables High‐Rate and Stable Sodium Batteries

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(30)

Published: May 9, 2022

Metallic Na is a promising anode for rechargeable batteries, however, it plagued by an unstable solid electrolyte interphase (SEI) and dendrites. Herein, robust anion-derived SEI constructed on in high-concentration 1,2-dimethoxyethane (DME) based with cosolvent hydrofluoroether, which effectively restrains dendrite growth. The hydrofluoroether can tune the solvation configuration of from three-dimensional network aggregates to solvent-cation-anion clusters, enabling more anions enter reinforce inner sheath their stepwise decomposition. gradient inorganic-rich leads reduced energy barrier Na+ migration enhanced interfacial kinetics. These render Na||Na3 V2 (PO4 )3 battery excellent rate capability 79.9 mAh g-1 at 24 C high capacity retention 94.2 % after 6000 cycles 2 C. This highlights modulation electrode-electrolyte chemistry advanced batteries.

Language: Английский

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Engineering iron-group bimetallic nanotubes as efficient bifunctional oxygen electrocatalysts for flexible Zn–air batteries

eScience, Journal Year: 2022, Volume and Issue: 2(5), P. 546 - 556

Published: May 11, 2022

Air cathode performance is essential for rechargeable zinc–air batteries (ZABs). In this study, we develop a self-templated synthesis technique fabricating bimetallic alloys (FeNi3), nitrides (FeNi3N) and heterostructured FeNi3/FeNi3N hollow nanotubes. Owing to its structural compositional advantages, exhibits remarkable bifunctional oxygen electrocatalytic with an extremely small potential gap of 0.68 ​V between the evolution reaction (OER) reduction (ORR). Theoretical calculations reveal reduced Gibbs free energy rate-limiting O–O bond formation during OER due self-adaptive surface reconfiguration, which induces synergistic effect Fe(Ni)OOH developed in situ on inner FeNi3/FeNi3N. ZAB fabricated using catalyst shows high power density, charge/discharge voltage excellent cycling stability. addition battery performance, corresponding quasi-solid-state robust flexibility integrability. The method extended prepare CoFe/CoFeN electrocatalyst, demonstrating applicability other iron-group elements.

Language: Английский

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Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(21), P. 12170 - 12253

Published: Oct. 25, 2023

Ionic liquids (ILs) consisting entirely of ions exhibit many fascinating and tunable properties, making them promising functional materials for a large number energy-related applications. For example, ILs have been employed as electrolytes electrochemical energy storage conversion, heat transfer fluids phase-change thermal storage, solvents and/or catalysts CO2 capture, biomass treatment biofuel extraction, high-energy propellants aerospace This paper provides an extensive overview on the various applications offers some thinking viewpoints current challenges emerging opportunities in each area. The basic fundamentals (structures properties) are first introduced. Then, motivations successful field concisely outlined. Later, detailed review recent representative works area is provided. application, role their associated benefits elaborated. Research trends insights into selection to achieve improved performance analyzed well. Challenges future pointed out before concluded.

Language: Английский

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In situ surface engineering enables high interface stability and rapid reaction kinetics for Ni-rich cathodes

eScience, Journal Year: 2022, Volume and Issue: 3(1), P. 100082 - 100082

Published: Nov. 11, 2022

Layered oxide cathodes with high Ni content promise energy density and competitive cost for Li-ion batteries (LIBs). However, Ni-rich suffer from irreversible interface reconstruction undesirable cracking severe performance degradation upon long-term operation, especially at elevated temperatures. Herein, we demonstrate in situ surface engineering of to construct a dual ion/electron-conductive NiTiO3 coating layer Ti gradient doping (NC90–Ti@NTO) parallel. The dual-modification synergy helps build thin, robust cathode–electrolyte rapid transport enhanced reaction kinetics, effectively prevents unfavorable crystalline phase transformation during cycling under harsh environments. optimized NC90–Ti@NTO delivers reversible capacity 221.0 mAh g−1 0.1C 158.9 10C. Impressively, it exhibits retention 88.4% 25 ​°C after 500 cycles 90.7% 55 300 pouch-type full battery. This finding provides viable clues stabilizing the lattice interfacial chemistry achieve durable LIBs density.

Language: Английский

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High-safety lithium metal pouch cells for extreme abuse conditions by implementing flame-retardant perfluorinated gel polymer electrolytes

Energy storage materials, Journal Year: 2023, Volume and Issue: 65, P. 103124 - 103124

Published: Dec. 16, 2023

Language: Английский

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Advanced MOF-derived carbon-based non-noble metal oxygen electrocatalyst for next-generation rechargeable Zn-air batteries

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 473, P. 214839 - 214839

Published: Sept. 20, 2022

Language: Английский

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Electrochemically and Thermally Stable Inorganics–Rich Solid Electrolyte Interphase for Robust Lithium Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(1)

Published: Sept. 9, 2023

Abstract Severe dendrite growth and high‐level activity of the lithium metal anode lead to a short life span poor safety, seriously hindering practical applications batteries. With trisalt electrolyte design, an F‐/N‐containing inorganics–rich solid interphase on is constructed, which electrochemically thermally stable over long‐term cycles safety abuse conditions. As result, its Coulombic efficiency can be maintained 98.98% for 400 cycles. An 85.0% capacity retained coin‐type full cells with 3.14 mAh cm −2 LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode after 200 1.0 Ah pouch‐type 4.0 72 During thermal runaway tests cycled pouch cell, onset triggering temperatures were increased from 70.8 °C 117.4 100.6 153.1 °C, respectively, indicating greatly enhanced performance. This work gives novel insights into interface potentially paving way high‐energy‐density, long‐life‐span, safe

Language: Английский

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