High energy density lithium-ion pouch cell with modified high voltage lithium cobalt oxide cathode and graphite anode: Prototype stabilization, electrochemical and thermal study

Journal of Power Sources, Год журнала: 2023, Номер 580, С. 233395 - 233395

Опубликована: Июль 17, 2023

Язык: Английский

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Gradient fluorination engineering through interdiffusion reaction for high-voltage LiCoO2

Energy storage materials, Год журнала: 2024, Номер 70, С. 103446 - 103446

Опубликована: Май 3, 2024

Язык: Английский

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Stabilizing 4.6 V LiCoO₂ via Surface‐to‐Bulk Titanium Modification

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 3, 2024

Abstract Elevating the charging cut‐off voltage is an effective strategy to increase energy density of LiCoO 2 . However, unstable interfacial structures and unfavorable phase transitions in bulk are inevitably triggered during deep de‐lithiation at high voltage. Herein, integrated surface‐to‐bulk Ti‐modification applied , enabling uniform Li TiO 3 coating on surface gradient Ti‐doping toward structural bulk. The resultant Ti‐modified (T‐LCO) electrode can be stably cycled up 4.6 V, providing a high‐rate capability 137 mAh g −1 5C long‐life stability with 80.5% capacity retention after 400 cycles 1C, far outperforming unmodified only 50.7% retention. In situ X‐ray diffraction characterization functional theory calculation reveal that synergistic modification T‐LCO enhances + diffusion, facilitates construction high‐quality cathode/electrolyte interphase, reduces transition from O3 H1‐3 Co3d/O2p band overlap, restrains layer‐to‐spinel distortion, thus improving V. This work presents “two birds one step” enhance cycling achievable high‐voltage for developing lithium‐ion batteries.

Язык: Английский

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A “three-in-one” strategy via La2O3-ZrO2 coating to effectively enhance the electrochemical performance of LiCoO2

Journal of Alloys and Compounds, Год журнала: 2024, Номер 989, С. 174377 - 174377

Опубликована: Апрель 2, 2024

Язык: Английский

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Surface Lattice Modulation Enables Stable Cycling of High‐Loading All‐solid‐state Batteries at High Voltages

Angewandte Chemie, Год журнала: 2024, Номер 136(16)

Опубликована: Фев. 21, 2024

Abstract Halide solid electrolytes, known for their high ionic conductivity at room temperature and good oxidative stability, face notable challenges in all–solid–state Li–ion batteries (ASSBs), especially with unstable cathode/solid electrolyte (SE) interface increasing interfacial resistance during cycling. In this work, we have developed an Al 3+ –doped, cation–disordered epitaxial nanolayer on the LiCoO 2 surface by reacting it artificially constructed AlPO 4 nanoshell; lithium–deficient layer featuring a rock–salt–like phase effectively suppresses decomposition of Li 3 InCl 6 stabilizes cathode/SE 4.5 V. The ASSBs halide high–loading cathode demonstrated discharge capacity long cycling life from to Our findings emphasize importance specialized modification preventing SE degradation achieving stable halide–based voltages.

Язык: Английский

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Metal-organic framework glass stabilizes high-voltage cathodes for efficient lithium-metal batteries

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 11, 2025

The rapid evolution of portable electronics and electric vehicles necessitates batteries with high energy density, robust cycling stability, fast charging capabilities. High-voltage cathodes, like LiNi0.8Co0.1Mn0.1O2 (NCM-811), promise enhanced density but are hampered by poor stability sluggish lithium-ion diffusion in conventional electrolytes. We introduce a metal-organic framework (MOF) liquid-infusion technique to fully integrate MOF liquid into the grain boundaries NCM-811, creating thoroughly coated cathode thin, rigid Glass layer. surface electrically non-conductive layer 2.9 Å pore windows facilitating Li-ion pre-desolvation enabling highly aggregative electrolyte formation inside channels, suppressing solvated co-insertion solvent decomposition. While inner composes conducting components enhancing diffusion. This functional structure effectively shields from particle cracking, CEI rupture, oxygen loss, transition metal migration. As result, Li | |Glass@NCM-811 cells demonstrate good rate capability even under high-charge rates elevated voltages. Furthermore, we also achieve 385 Wh kg-1 pouch-cell (19.579 g, for pouch-cell), showcasing practical potential this method. straightforward versatile strategy can be applied other high-voltage cathodes Li-rich manganese oxides LiCoO2.

Язык: Английский

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Achievable Surface–Bulk Structure Dual Reinforced by Room-Temperature Al-Induced Engineering Enables Stable Battery Cycling of 4.6 V LiCoO₂

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Язык: Английский

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In situ multifunctional surface design for high-performance 4.6 V LiCoO2

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163516 - 163516

Опубликована: Май 1, 2025

Язык: Английский

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Sustainable recovery of LiCoO2 from spent lithium-ion batteries: Simplicity, scalability, and superior electrochemical performance

Chemical Engineering Journal, Год журнала: 2023, Номер 479, С. 147710 - 147710

Опубликована: Ноя. 27, 2023

Язык: Английский

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Scalable Precise Nanofilm Coating and Gradient Al Doping Enable Stable Battery Cycling of LiCoO₂ at 4.7 V

Angewandte Chemie, Год журнала: 2024, Номер 136(32)

Опубликована: Май 13, 2024

Abstract The quest for smart electronics with higher energy densities has intensified the development of high‐voltage LiCoO 2 (LCO). Despite their potential, LCO materials operating at 4.7 V faces critical challenges, including interface degradation and structural collapse. Herein, we propose a collective surface architecture through precise nanofilm coating doping that combines an ultra‐thin LiAlO layer gradient Al. This not only mitigates side reactions, but also improves Li + migration kinetics on surface. Meanwhile, Al inhibited severe lattice distortion caused by irreversible phase transition O3−H1−3−O1, thereby enhanced electrochemical stability during cycling. DFT calculations further revealed our approach significantly boosts electronic conductivity. As result, modified exhibited outstanding reversible capacity 230 mAh g −1 V, which is approximately 28 % than conventional 4.5 V. To demonstrate practical application, cathode structure shows improved in full pouch cell configuration under high voltage. excellent cycling stability, retaining 82.33 after 1000 cycles multifunctional modification strategy offers viable pathway application materials, setting new standard high‐energy‐density long‐lasting electrode materials.

Язык: Английский

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