Simultaneous all-lattice-site Mg/Al/F co-doping and gradient fluorination enable biphasic modifications and surface stabilization for high-performance Li-rich layered oxides

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163394 - 163394

Опубликована: Май 1, 2025

Язык: Английский

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Synergistic integration of internal gradient-doping and external coating for superior performance in lithium-rich Mn-based cathodes

Chemical Engineering Science, Год журнала: 2025, Номер unknown, С. 121819 - 121819

Опубликована: Май 1, 2025

Язык: Английский

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Facilitating uniform lithium-ion transport via polymer-assisted formation of unique interfaces to achieve stable 4.7 V Li metal battery

National Science Review, Год журнала: 2025, Номер 12(6)

Опубликована: Май 5, 2025

ABSTRACT Achieving stable cycling of lithium metal batteries (LMBs) at high voltages presents a significant challenge due to interfacial instability and uneven lithium-ion transport, leading dendrite formation cathode degradation. Constructing solid-electrolyte interphase (SEI) that facilitates fast uniform ion transport is crucial for enhancing the stability electrode structures. However, current research mainly focuses on while neglecting which even more critical. In this study, we develop novel electrolyte system, PAFE, by incorporating aluminum ethoxide (Al(EtO)3), fluoroethylene carbonate (FEC), pentafluorocyclotriphosphazene (PFPN) into carbonate-based electrolyte. Al(EtO)3 serves as crosslinking agent, facilitating three-dimensional polymer network promotes deposition inorganic components such LiF, Li3N, Li3P Al2O3 within SEI cathode-electrolyte (CEI). These interphases lower activation energy thereby ensuring consistent flow reducing internal stress electrodes. As result, Li||LiNi0.8Co0.1Mn0.1O2 (NCM811) cells with PAFE exhibit exceptional stability, retaining 80% capacity over 140 cycles cut-off voltage 4.7 V. Furthermore, 1 Ah pouch demonstrate excellent performance, highlighting potential system practical high-energy-density LMB applications.

Язык: Английский

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Oxygen Vacancy Engineering for High-Performance Li-Rich Manganese Cathodes: Advances and Prospects

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104321 - 104321

Опубликована: Май 1, 2025

Язык: Английский

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Cu-mediated bipolar-type extended π-conjugated microporous polymers for lithium-ion battery cathode with high energy density and fast-charging capability

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

A Cu 2+ -mediated bipolar-type CMP is developed to maximize abundant active site utilization and enhance ion diffusion kinetics for durable, high energy-density, fast-charging LIB cathodes.

Язык: Английский

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High‐Entropy Li‐Rich Layered Cathodes with Negligible Voltage Decay through Migration Retardation Effect

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract The development of advanced Li‐ and Mn‐rich layered cathodes (LRO) is essential for high‐energy lithium‐ion batteries (LIBs). However, LRO exhibits large voltage hysteresis rapid decay with irreversible TM migration upon prolonged cycling. Given that high‐entropy oxides have expanded the potential retarding harmful phase transition regulating site energies, therefore a Li 1.17 Mn 0.50 Ni 0.12 Co Mg 0.03 Cu 0.02 Ti Nb O 2 cathode synthesized (HELRO) LIBs in present study, demonstrated significantly improved retention energy output. In addition, this work unveils sluggish degradation superlattice local structure HELRO during long charge–discharge cycles explains “migration retardation effect.” higher configurational entropy contributes to barriers in‐plane, out‐of‐plane, continuous migrations due synergistic ionic–covalent enhancement Mn─O bonds. This provides new insights understanding improvement mechanisms high demonstrates feasibility suppressing long‐standing by design combining covalent ionic elements.

Язык: Английский

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Outlook of Doping Engineering in NMC and LMNO Cathode Materials for Next-Generation Li-Ion Batteries

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Июнь 4, 2025

Язык: Английский

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A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Abstract Lithium‐rich layered oxide cathodes (LLO) are renowned for their high specific capacity (>250 mAh g−¹) and have emerged as promising candidates lithium‐ion batteries. However, significant fades voltage decay pose challenges to commercialization, primarily due the degradation of original structure. In this study, a simple rapid approach is presented that combines interfacial engineering particle assembly achieve highly stable LLO cathode. This cathode features single‐crystal reassembled into porous microsphere structure, along with surface coating polypropylene phosphate amide (PPA) formed through in situ cross‐linking polyacrylic acid ammonium polyphosphate, deuterogenic spinel interface layer. The dual protective coatings‐PPA spinel‐effectively inhibit dissolution transition metals, delay structural deterioration, enhance diffusion. Additionally, cross‐linked PPA layer strengthens interconnection among nanoparticles, improving stability assembled structures while mitigating electrolyte corrosion. Consequently, LLO@PPA electrode exhibits excellent retention 84.87% over 500 cycles at 0.5 C shows improvements rate performance. work offers an effective modification strategy developing next‐generation lithium‐rich enhanced cycle life.

Язык: Английский

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Expandable Fast Li‐Ion Diffusion Network of Li‐Rich Mn‐Based Oxides via Single‐Layer LiCo(Ni)O₂ Segregation

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 20, 2024

Abstract Li‐rich Mn‐based cathode materials exhibit a remarkable reversible specific capacity exceeding 250 mAh g −1 , positioning them as the preferred choice for next generation of high‐energy density lithium‐ion battery materials. However, their inferior rate and cycling performance pose significant challenges. In this context, material incorporating an expanded fast Li‐ion diffusion network has been successfully synthesized. This advancement involves introduction single‐layer LiCo(Ni)O 2 with high coefficients into crystal structure cathode, thereby enhancing performance, achieving impressive 212 at 5 C. Furthermore, can effectively isolates Li MnO 3 phase domains, structural stability during anion redox process, consequently extending electrochemical limits. Operating within voltage range 2.1–4.6 V, retention reaches 80% after 400 cycles, decay merely 0.74 mV per cycle. innovative utilization provides invaluable insights that will guide development strategies aimed unlocking capability in layered oxide

Язык: Английский

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Topological Protection of Oxygen Redox in Li-Rich Cathodes

The Journal of Physical Chemistry Letters, Год журнала: 2024, Номер unknown, С. 10068 - 10078

Опубликована: Сен. 26, 2024

Lithium-rich layered oxides (LRLOs) are regarded as promising candidates for next-generation cathode materials because of their high energy density derived from anionic redox activity. Recent years have seen increasing efforts in promoting the cyclability LRLO cathodes, at core which is suppression irreversible internal structural evolution during cycling. The present article aims to provide an informative perspective on design strategies related issue oxygen release. Emphasis placed underlying chemistry LRLOs and based material topology that can mitigate migration surface. We speculate these insights could guide researchers developing high-capacity cathodes with intrinsically reversibility redox.

Язык: Английский

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