Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 13, 2024

Abstract With the continuously growing demand for wide‐range applications, lithium‐ion batteries (LIBs) are increasingly required to work under conditions that deviate from room temperature (RT). However, commercial electrolytes exhibit low thermal stability at high temperatures (HT) and poor dynamic properties (LT), hindering operation of LIBs extreme conditions. The bottleneck restricting practical applications has promoted researchers pay more attention developing a series innovative electrolytes. This review primarily covers design adaptability perspective. First, fundamentals concerning temperature, including donor number (DN), dielectric constant, viscosity, conductivity, ionic transport, theoretical calculations elaborated. Second, prototypical examples, such as lithium salts, solvent structures, additives, interfacial layers in both liquid solid electrolytes, presented explain how these factors can affect electrochemical behavior or temperatures. Meanwhile, principles limitations electrolyte discussed corresponding Finally, summary outlook regarding extend proposed.

Language: Английский

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Intrinsically Safe Lithium Metal Batteries Enabled by Thermo‐electrochemical Compatible in‐situ Polymerized Solid‐state Electrolytes

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)

Published: June 28, 2024

In situ polymerized solid-state electrolytes have attracted much attention due to high Li-ion conductivity, conformal interface contact, and low resistance, but are plagued by lithium dendrite, degradation, inferior thermal stability, which thereby leads limited lifespan severe safety hazards for high-energy metal batteries (LMBs). Herein, an in electrolyte is proposed copolymerization of 1,3-dioxolane with 1,3,5-tri glycidyl isocyanurate (TGIC) as a cross-linking agent, realizes synergy battery compatibility Li anode. Functional TGIC enhances the polymeric level. The unique carbon-formation mechanism facilitates flame retardancy eliminates fire risk. meantime, TGIC-derived inorganic-rich interphase inhibits side reactions promotes uniform plating. Intrinsically safe LMBs nonflammability outstanding electrochemical performances under extreme temperatures (130 °C) achieved. This functional polymer design shows promising prospect development LMBs.

Language: Английский

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Lithiophilic V₂CT_x/MoO₃ Hosts with Electronic/Ionic Dual Conductive Gradients for Ultrahigh‐Rate Lithium Metal Anodes

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

Published: July 24, 2024

Abstract Lithium (Li) metal is considered as a promising anode material for high‐energy batteries; yet, its practical application hindered by uncontrolled Li dendrite growth, especially at high rate. Herein, dual conductive gradient V 2 CT x /MoO 3 (DG‐V ) host that integrates electronic/ionic gradients and lithiophilicity prepared layer‐by‐layer assembly dendrite‐free anodes. Gradient LiF deriving from different amount of endows good ionic gradient; while, MoO regarded spacer to avoid the restacking , increasing space deposition. The effectively optimize current density + flux distribution bottom, achieving fast reduction “bottom–up” deposition mode. Meanwhile, lithiophilic guide homogeneous growth. As result, symmetrical half‐cells based on DG‐V @Li anodes conduct 700 h 5 mAh cm −2 20 mA . @Li||LiFePO 4 full‐cells maintain capacity retention 85.4% after 1350 cycles C. Remarkably, @Li||LiNi 0.6 Co 0.2 Mn O can run 150 with 80.6% even harsh conditions. well‐adjusted materials structures both properties will bring inspiration novel design other batteries.

Language: Английский

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Suppression of Adverse Phase Transition of Layered Oxide Cathode via Local Electronic Structure Regulation for High-Capacity Sodium-Ion Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(28), P. 18622 - 18634

Published: July 1, 2024

Advancing the high-voltage stability of O3-type layered cathodes for sodium-ion batteries is critical to boost their progress in energy storage applications. However, this type cathode often suffers from intricate phase transition and structural degradation at high voltages (i.e., >4.0 V vs Na+/Na), resulting rapid capacity decay. Here, we present a Li/Ti cosubstitution strategy modify electronic configuration oxygen elements oxide cathode. This deliberate modulation simultaneously mitigates transitions counteracts weakening shielding effect extraction sodium ions, thus enhancing electrostatic bonding within TM layer inducing optimizing O3-OP2 occurring voltage range 2.0-4.3 V. Consequently, cosubstituted NaLi1/9Ni1/3Mn4/9Ti1/9O2 exhibits an astounding 161.2 mAh g-1 1C, stable cycling up 100 cycles has been achieved. work shows impact mechanism element substitution on interlayer forces transitions, providing crucial reference optimization materials.

Language: Английский

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A surface chemistry-regulated gradient multi-component solid electrolyte interphase for a 460 W h kg⁻¹ lithium metal pouch cell

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(20), P. 7699 - 7711

Published: Jan. 1, 2024

We present a simple and scalable surface chemical approach of spraying dilute DFFSA solution on the Li to eliminate native passivation layer form multi-component SEI, enabling stable cycling 460 W h kg −1 metal pouch cell.

Language: Английский

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Demonstration of MAX phases as triple functional artificial solid electrolyte interphase for ultralong life lithium metal anodes

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 737 - 746

Published: Oct. 9, 2024

Language: Английский

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2D Nanochannel Interlayer Realizing High‐Performance Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Abstract Commercialization of lithium–sulfur (Li–S) batteries is largely limited by polysulfide shuttling and sluggish kinetics. Herein, 2D nanochannel interlayer composed alternatively‐stacked porous silica nanosheets (PSN) Ti 3 C 2 T x ‐MXene are developed. The nanochannels with selective cation transport characteristics facilitate lithium ion rapid transport, while reject the translocation anions across separator. hydroxylated MXene shifts p ‐band center surface O on PSN closer to Fermi level, leading strong absorptive/catalytic effect for polysulfides thus fast transformation Together ion/electron bi‐conduction function PSN/MXene, Li–S deliver high initial capacity 1443 mAh g −1 at 0.1 C, low‐capacity decay rate 0.049% per cycle over 800 cycles excellent capability. At a sulfur loading 5.2 mg cm −2 , cells present higher areal specific than commercial batteries. pouch lean electrolyte (E/S = 3.9 µL ) yield 2‐Ah 100 mA, energy density cycling stability. This contribution opens up new avenues expanding application nanofluidics in electrochemical storage conversion.

Language: Английский

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Bilayer Artificial Solid Electrolyte Interphase with 75 GPa Young's Modulus Enable High Energy Density Lithium Metal Pouch Cells

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract The artificial solid electrolyte interphase (SEI) layer is capable of protecting lithium anodes and preventing side reactions with electrolytes. development inorganic/organic composite hybrid SEI can be considered as an efficient strategy to combine the merits high ion conductivity, mechanical modulus, flexibility. However, it still poses a great challenge solve agglomeration problem in these maintain strong interaction between metal. Herein, bilayer ultra‐thin (P‐FEM@Li) derivative from reactive fluorinated copolymer (P‐FEM) prepared shows ultra‐large Young's modulus (> 75 GPa). robust inorganic LiF‐rich provides superior ionic conductivity large while flexible organic polymer regulates ions transport compatibility. P‐FEM induced demonstrate stable cycles for more than 4400 h at 1 mA cm −2 average coulombic efficiency (CE) Li||P‐FEM@Cu 99.78% after 100 cycles. Moreover, P‐FEM@Li||NCM811 punch cell 428 Wh kg −1 exhibits high‐capacity retention 73% 175 This work new way prepare practical anodes.

Language: Английский

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Solvent-derived organic-rich SEI enables capacity enhancement for low-temperature lithium metal batteries

Joule, Journal Year: 2025, Volume and Issue: unknown, P. 101823 - 101823

Published: Feb. 1, 2025

Language: Английский

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Pseudosolvent Guiding Ultralight V₂CT_x/Bacterial Cellulose with Fast Ion Diffusion Paths for High‐Rate and High‐Capacity Lithium Metal Anodes

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Abstract Practical application of Li metal anodes (LMAs) is restricted by growth dendrites. Achieving uniform deposition with high practically available specific capacity vital to obtain advanced LMAs. Herein, an ultralight V 2 CT x /bacterial cellulose (U‐V /BC) foam a volume density 0.039 g cm −3 guided tertiary butanol avoid restacking both and BC. The lithiophilic functional groups BC synergistically induce the nucleation. loose stacking structure U‐V /BC provides 3D ion channels for accelerating + diffusion, homogeneous flux, as well enough sites interspace deposition. As result, /BC@Li exhibits superior stability 2800 h at 5 mAh −2 mA ultrahigh 2040 −1 . Furthermore, full‐cells paired LiFePO 4 cathodes possess remarkable retention 80.7% after 800 cycles 1 C. Even harsh conditions, /BC@Li||LiFePO can also run 100 0.3 C 84.9%. This work sheds light on surface engineering multiscale architecture design LMAs capacity.

Language: Английский

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