Rapid Thermal Runaway Detection of Lithium-Ion Battery via Swelling-Based State-of-Charge Monitoring Using Piezoresistive Sponge Sensor

eTransportation, Journal Year: 2025, Volume and Issue: unknown, P. 100404 - 100404

Published: Feb. 1, 2025

Language: Английский

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Multidentate ether-induced reconfiguration of solvation structure in non-flammable phosphate electrolytes for wide-temperature application in lithium-ion batteries

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Conventional carbonate electrolytes fail to meet the requirements for lithium-ion batteries (LIBs) with wide temperature range and high safety. Diethyl ethylphosphonate (DEEP) has excellent flame retardancy a (-83 198°C), which holds promise developing non-flammable electrolyte wide-temperature application in LIBs. However, its limited compatibility graphite electrodes slow ionic transport capability must be addressed effective application. Herein, we introduce diethylene glycol dimethyl ether (DEGDME) reconfigure solvation structure of DEEP-based further enhance ion capacity. The film-forming additives enable preserve 98% capacity retention after 150 cycles Li||Graphite cells modified DEGDME improved low-temperature performance achieving 71% 50th-cycle Graphite||LiFePO₄ at -20°C. This work introduces new strategy designing phosphate electrolytes, enabling reliable safe LIBs across range.

Language: Английский

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Insights into the doping rules of heteroatom on Ni-rich ternary cathode stability by integrating high throughput calculation and machine learning

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Thermoresponsive Mono‐Solvent Electrolyte Inhibiting Parasitic Reactions for Safe Lithium Metal Batteries

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

Published: April 10, 2025

Abstract Solvents in liquid and gel polymer electrolytes are recognized for contributing to high ionic conductivity high‐energy‐density lithium metal batteries. However, parasitic reactions involving solvents induce safety risks under thermal abuse conditions poor lifespan during room‐temperature cycles, which rarely investigated. This study introduces a thermoresponsive mono‐solvent electrolyte as built‐in switch. The polymerizes at elevated temperatures, creating passivate network without residue solvents. exhibits stability with 91% mass retention 200 °C significantly suppresses side between the electrolyte, reducing runaway risks. Ah‐level Li||LiNi 0.8 Co 0.1 Mn O 2 pouch batteries employing this can efficiently improve critical temperature of by 75 compared electrolyte. At ambient promotes formation stable solid interphase (SEI) rich LiF Li O, effectively dendrite growth on anode. Consequently, 0.5 0.2 0.3 cells retain capacity after 152 even high‐loading cathodes (19.7 mg cm −2 , 3 mAh ). research offers valuable insights into inhibiting electrochemical cycle runaway, enhancing

Language: Английский

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Consolidating Surface Lattice via Facile Self‐Anchored Oxygen Layer Reconstruction Toward Superior Performance and High Safety Nickel‐Rich Oxide Cathodes

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

Published: Jan. 10, 2025

Abstract Nickel‐rich oxide materials have been recognized as promising cathodes for state‐of‐art high energy lithium‐ion batteries; however, challenges remain in their commercialization due to chemical and structural degradation, poor thermal stability related oxygen lattice destabilization. Herein, this work reports a straightforward approach stabilizing the surface framework by inducing reconstruction via swift proton exchange heat treatment argon atmosphere. The robust structure with localized disordered phase domains effectively suppresses interfacial parasitic reactions highly delithiated reduces detrimental degradation. Enabled strongly anchored framework, consolidated also reinforces cathode featured higher decomposition temperature reduced release under stress. In comparison unmodified counterpart, reconstructed nickel‐rich demonstrates improved cycling rate capability. This reveals critical role of regulating on electrochemical performance behaviors, explores potential feasible modification advanced batteries.

Language: Английский

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Fire-Proofing, Mechanic-Reinforcing, Electrostatic-Spinning Strategies Toward Fabricating Porous Separator for Superior and Safer Lithium-Ion Batteries

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Language: Английский

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Chelating Solvent Mediated Solvation Structure Enables High‐Rate Operation of Ah‐Level Li‐Ion Batteries in Nonflammable Phosphate Electrolyte

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

Published: April 25, 2025

Abstract Highly flammable carbonate electrolytes induce significant safety risk for lithium‐ion batteries (LIBs), raising concerns about their suitability large‐scale applications. In contrast, non‐flammable phosphate offer a potential solution, yet the untamed strong interaction of Li + ‐phosphates and inefficient diffusion result in sluggish reaction kinetics, which restricts operation Ah‐level LIBs to rates below 0.2C. Herein, chelating solvent‐mediated ion‐solvent coordinated structure is designed modulate interaction. This innovative approach enables high‐efficiency pseduo‐structrural diffusion, similar that observed high concentration electrolytes, while maintaining standard 1 mol L −1 achieving Li⁺ conductivity. The operating rate graphite|LiFePO 4 cells increased from 0.2C 2C, with Ah 25 retaining 73.9% 71.0% capacity after 1000 600 cycles, respectively. Additionally, maximum temperature during nail penetration significantly reduced 338.9 200 °C. strategy provides promising tuition developing advanced electrolytes.

Language: Английский

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Temperature‐Inert Interface Enables Safe and Practical Energy‐Dense LiNi_0.91Co_0.07Mn_0.02O₂ Pouch Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)

Published: July 20, 2024

Abstract Safety concerns significantly hinder the practical implementation of ultrahigh‐nickel cathodes in lithium‐ion batteries. The solid electrolyte interphase (SEI) derived from conventional ester‐based is susceptible to thermal decomposition, resulting battery safety degradation. Herein, a temperature‐inert and inorganic‐rich SEI developed for LiNi 0.91 Co 0.07 Mn 0.02 O 2 |graphite (NCM91|Gr) by employing flame‐retardant diluted weakly solvated electrolyte. Temperature‐dependent X‐ray photoelectron spectroscopy reveals that SEI's inorganic components LiF, Li SO 3 , 4 N exhibit exceptional thermotolerance under attack. Further evidence temperature‐dependent diffraction indicates this thermally stable interface effectively mitigates anode phase transition original LiC 6 12 state, remarkable improvement intrinsic 32% reduction gas emission battery. 1.2 Ah NCM91|Gr pouch cell exhibits failure onset temperature as high 183.1 °C maintains stability at 180 60 min. Furthermore, 360 Wh kg −1 12.3 0.92 0.06 |graphite@20% silicon dioxide experiences no runaway even 200 °C. also delivers outstanding capacity retention 90.5% after 1200 cycles with enhanced electrochemical performance. This study provides promising approach developing safer energy‐dense batteries through design.

Language: Английский

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Cation migration of layered oxide cathodes for sodium-ion batteries: fundamental failure mechanisms and practical modulation strategies

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

We comprehensively review the research advances in cation migration of sodium layered oxides, systematically revealing fundamental mechanisms and practical modulation strategies for irreversible leading to battery failure.

Language: Английский

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