Molecular-level Regulation of PEO-Based Electrolytes with CaF₂ Nanoparticles for Advanced Solid-State Lithium Metal Batteries

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2228 - 2235

Опубликована: Апрель 9, 2025

Язык: Английский

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Revealing Irradiation-Induced Dynamic Structural Failure in LiCoO₂ Cathodes via Electron-Temperature-Dependent Deep Potential Molecular Dynamics

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 4155 - 4161

Опубликована: Апрель 18, 2025

In lithium-ion batteries (LIBs) used for deep-space exploration, LiCoO2 cathode materials face significant challenges in high-radiation environments, including structural degradation and ion migration. This study investigates the dynamic evolution of under irradiation using electron-temperature-dependent deep potential (ETD-DP) model. Compared with traditional ab initio molecular dynamics (AIMD) simulations, ETD-DP method extends both spatial temporal scales by several orders magnitude. The results reveal that LiCoO2's response to occurs on nanosecond time scale, divided into three stages: traversal, intense local adjustment, structure relaxation. During adjustment stage, induces migration transition metal ions toward lithium layers. relaxation cobalt displaced from their equilibrium positions form a dumbbell adjacent Co ions. simulation were validated through high-energy electron beam experiments aberration-corrected microscopy. provides valuable insights improving tolerance LIB offers new perspectives application particle-beam-based fine characterization techniques advanced battery applications.

Язык: Английский

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A review on challenges in low temperature Lithium-ion cells and future prospects

Applied Energy, Год журнала: 2025, Номер 393, С. 125987 - 125987

Опубликована: Май 9, 2025

Язык: Английский

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Analysis of failure mechanisms and behavior of LiCoO2-graphite batteries at 0 ℃

Next Materials, Год журнала: 2025, Номер 8, С. 100709 - 100709

Опубликована: Май 20, 2025

Язык: Английский

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Electrolyte Design via Hydrogen Bonding Between Solvent and Non‐Solvating Cosolvent Enabling Stable Lithium Metal Batteries at −20°C

Carbon Neutralization, Год журнала: 2025, Номер 4(3)

Опубликована: Май 1, 2025

ABSTRACT Lithium metal batteries (LMBs) have great significance in enhancing energy density. However, low ion diffusion bulk electrolytes, high desolvation of Li + , and sluggish transport kinetics electrode interphases at temperatures cause LMBs to a short cycle life (usually below 300 cycles). In this study, we designed low‐temperature electrolyte overcome these issues. The medium‐chain length isopropyl formate (IPF) was employed as main solvent the electrolyte. Especially, hydrogen bonding between non‐solvating cosolvent (1,1,2,2‐tetrafluoroethyl‐2,2,2‐trifluoroethyl ether [TFE]) IPF can be formed, leading weakened interaction solvents. Thus, fast achieved. Additionally, maintain conductivity (6.37 mS cm −1 ) −20°C achieve higher transference numbers (0.62). Finally, Li||LiFePO 4 full cells using exhibit capacity 113 mAh g after 480 cycles 0.1C under −20°C. Meanwhile, deliver 150 120 50°C. This study provides novel pathway for optimizing electrolytes next‐generation during operations.

Язык: Английский

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Supercritical CO2 Brayton Cycle for Space Exploration: New Perspectives Base on Power Density Analysis

Energy, Год журнала: 2024, Номер 313, С. 133772 - 133772

Опубликована: Ноя. 13, 2024

Язык: Английский

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