Self‐Grading and Surface‐Preservation to Enhance the Compaction Density and Structural Stability of Li‐Rich Mn‐Based Cathode

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

Published: Feb. 21, 2025

Abstract Li‐rich Mn‐based (LRM) cathode materials are considered promising candidates for next‐generation lithium‐ion batteries due to their high specific capacity and cost‐effectiveness. However, they exhibit deficiencies in volumetric energy density, largely attributable lower compaction which constrains application space‐limited devices such as electric vehicles portable devices. In this study, (NH 4 ) 2 S O 8 surface treatment is proposed enhance the density stability performance of LRM materials. This induces formation Li/O vacancies spinel structure, leading an increase initial Coulombic efficiency (ICE) from 75.62% 89.07%, well discharge 214.2 266.01 mAh g −1 compared with untreated sample. Furthermore, self‐grading generated by crushing particles during process, results enhancement 3.18 cm −3 3145 Wh L , significantly surpassing 2487 commercial The present work provides new perspectives development density.

Language: Английский

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Three birds with one stone: reducing gases manipulate surface reconstruction of Li-rich Mn-based oxide cathodes for high-energy lithium-ion batteries

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104202 - 104202

Published: March 1, 2025

Language: Английский

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An integrated strategy of surface coating and dual-element doping to enhance electrochemical performances of Li-rich layered oxide for lithium-ion batteries

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 640, P. 236715 - 236715

Published: March 12, 2025

Language: Английский

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Fundamentals, Status and Promise of Li‐Rich Layered Oxides for Energy‐Dense Li‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Li‐ion batteries (LIBs) are the dominant electrochemical energy storage devices in global society, which cathode materials key components. As a requirement for higher energy‐dense LIBs, Li‐rich layered oxides (LLO) cathodes that can provide specific capacity urgently needed. However, LLO still face several significant challenges before bringing these to market. In this Review, fundamental understanding of is described, with focus on physical structure‐electrochemical property relationships. Specifically, various strategies toward reversible anionic redox discussed, highlighting approaches take basic structure battery into account. addition, application all‐solid‐state and consider prospects assessed.

Language: Английский

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Recent Progress and Challenges of Li‐Rich Mn‐Based Cathode Materials for Solid‐State Lithium‐Ion Batteries

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

Published: Dec. 17, 2024

Li-rich Mn-based (LRM) cathode materials, characterized by their high specific capacity (>250 mAh g

Language: Английский

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One-step simultaneous construction of oxygen vacancies and Mo-O bonds to enhance the cyclic stability of lithium-rich manganese-based layered oxides

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 178267 - 178267

Published: Dec. 1, 2024

Language: Английский

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Regulation of Extra Li Inventory in Anode-Free Lithium Metal Batteries by Li-Rich Layered Oxide Cathode Materials

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Li-rich layered oxide (LRO) cathode material is utilized in anode-free Li metal batteries to provide extra inventory, compensating for the constant loss during cycling. The compensation mechanism of LRO system elucidated by exploring reversible/irreversible consumption behaviors. Moreover, relationship between areal capacity, and cycling performance Cu||LRO cell quantitatively analyzed. well-designed demonstrates 51% capacity retention after 60 cycles at a practical 5.0 mAh cm-2, overwhelming 0.6% Cu||NCM523. Further optimization with an artificial anode protection layer fully fluorinated electrolyte enhances 61.4% 71.5% cycles, respectively. Combining its low initial Coulombic efficiency high specific energy, shows great prospects future development energy long lifespan batteries.

Language: Английский

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Oxygen Dopants in MoS₂ Catalysts as Dual Anchors for a Lithium Polysulfide Chain to Accelerate Conversion to Solid Li₂S: A Strategy to Mitigate the Shuttle Effect in Li–S Batteries

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

The development of lithium-sulfur batteries (LSBs) is hindered by the solubility polysulfide intermediates. Herein, we synthesized oxygen-doped MoS2 on a highly conductive CNT as cathode material for LSBs. spaced oxygen dopants catalyst surface enable Li chains to adsorb parallel surface. This configuration restricts and accelerates conversion soluble polysulfides insoluble Li2S. Therefore, Mo(S-O)2/CNT demonstrates an impressive discharge capacity (1410.4 mAh g-1 at 0.2 C 880.3 2 C) along with exceptional cycle stability, retaining 62.7% after 100 cycles showing low decay rate 0.094% per over 400 in work will inspire further research deanchoring design Li2S from negatively charged polar catalysts well studies synchronization catalysis anchoring-deanchoring process.

Language: Английский

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Heterogeneity of the Dominant Causes of Performance Loss in End‐of‐Life Cathodes and Their Consequences for Direct Recycling

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

Published: March 10, 2025

Abstract Recycling Li‐ion batteries from electric vehicles is critical for reducing costs and supporting the development of a domestic battery supply chain. Direct recycling cathodes, like LiNi x Mn y Co z O 2 (NMC), attractive due to its low cost, energy use, emissions compared traditional techniques. However, comprehensive understanding active material properties at end‐of‐life needed guide direct processes performance‐dependent reuse applications. Here, NMC an commercial pouch cell characterized bench‐marked against pristine non‐cycled counterparts with respect capacity, impedance, crystallography, morphology, microstructure identify major degradation modes understand variability in material. The spatial heterogeneity each property throughout also quantified. While degraded demonstrated similar capacity as pristine, impedance rate capability are severely diminished. Furthermore, samples periphery electrode layers showed more severe performance loss extracted central regions. dominant culprit microstructure, where magnitude particle cracking strongest correlation components that most unfavorably impacted. This work suggests cracks cathode materials primary challenge methods must overcome.

Language: Английский

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Li-rich oxide micro-bricks with exposed {010} planes to construct ultrahigh-compaction hierarchical cathodes for Li-ion batteries

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100405 - 100405

Published: April 1, 2025

Language: Английский

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