Why the Synthesis Affects Performance of Layered Transition Metal Oxide Cathode Materials for Li‐Ion Batteries

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 13, 2024

Abstract The limited cyclability of high‐specific‐energy layered transition metal oxide (LiTMO 2 ) cathode materials poses a significant challenge to the industrialization batteries incorporating these materials. This limitation can be attributed various factors, with intrinsic behavior crystal structure during cycle process being key contributor. These factors include phase induced cracks, reduced Li active sites due Li/Ni mixing, and slower + migration. In addition, presence synthesis‐induced heterogeneous phases lattice defects cannot disregarded as they also contribute degradation in performance. Therefore, gaining profound understanding intricate relationship among material synthesis, structure, performance is imperative for development LiTMO . paper highlights pivotal role structural play provides comprehensive overview how control influence specific pathways evolution synthesis process. it summarizes scientific challenges associated diverse modification approaches currently employed address cyclic failure overarching goal provide readers insights into study

Язык: Английский

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Insight of Synthesis of Single Crystal Ni‐Rich LiNi_1−x−yCo_xMn_yO₂ Cathodes

Advanced Energy Materials, Год журнала: 2024, Номер 14(11)

Опубликована: Янв. 26, 2024

Abstract Single‐crystal Ni‐rich LiNi 1−x−y Co x Mn y O 2 (NCM) cathodes have garnered widespread attention in the lithium‐ion battery community due to their unique advantages mechanical performance and ability minimize interfacial electrochemical side reactions. The synthesis of single‐crystal materials with monodisperse appropriate size, minimal lattice defects, highly ordered structures is key for high‐performance batteries. However, achieving this goal poses challenges lack in‐depth understanding regarding specific experimental parameters solid reaction mechanism during process. In review, aim provide an analysis critical process involved impact on crystal morphology, structure, performance. Consequently, first section focuses effect precursor lithium salt, atmosphere, sintering procedure. second section, study delves into discussion growth mechanism. Lastly, it concluded by highlighting prospects associated application NCM cathodes.

Язык: Английский

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Constructing Iron Vacancies in Thiospinel FeIn₂S₄ to Modulate Fe D‐Band Center and Accelerate Sodiation Kinetics Enabling High‐Rate and Durable Sodium Storage

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract The bimetallic synergies effect and combined conversion/alloying mechanism endow thiospinel FeIn 2 S 4 with great potential as an anode material for sodium‐ion batteries (SIBs). However, their inconsistent synthesis, severe volumetric expansion, sluggish reaction kinetics typically lead to unsatisfactory cyclic stability rate capability. Herein, organic framework derived @N/S‐C microrods Fe vacancies is presented fast, durable, reversible sodium storage. presence of significantly modulates the d ‐band center decreases strength Fe─S bond facilitating sodiation jointly. Moreover, a thin stable solid electrolyte interface film inorganic‐rich components formed by induction. Combined N, co‐doped porous carbon matrix, optimal sample delivers excellent capability 381 mAh g −1 at 10 A performance (448 after 500 cycles 1 ). Furthermore, assembled full‐cells also exhibit superior electrochemical 87.5% capacity retention long‐term evaluations. This work presents promising strategy structural regulation sulfides advanced anodes SIBs.

Язык: Английский

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Designing water/air-stable Co-free high-entropy oxide cathodes with suppressed irreversible phase transition for sodium-ion batteries

Applied Surface Science, Год журнала: 2023, Номер 636, С. 157856 - 157856

Опубликована: Июнь 25, 2023

Язык: Английский

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Understanding the Insight Mechanism of Chemical‐Mechanical Degradation of Layered Co‐Free Ni‐Rich Cathode Materials: A Review

Small, Год журнала: 2023, Номер 19(32)

Опубликована: Май 8, 2023

Abstract Layered Cobalt (Co)‐free Nickel (Ni)‐rich cathode materials have attracted much attention due to their high energy density and low cost. Still, further development is hampered by material instability caused the chemical/mechanical degradation of material. Although there are numerous doping modification approaches improve stability layered materials, these still in laboratory stage require research before commercial application. To fully exploit potential a more comprehensive theoretical understanding underlying issues necessary, along with active exploration previously unrevealed mechanisms. This paper presents phase transition mechanism Co‐free Ni‐rich existing problems, state‐of‐the‐art characterization tools employed study transition. The causes crystal structure degradation, interfacial instability, mechanical elaborated, from material's its atomic orbital splitting. By organizing summarizing mechanisms, this aims establish connections among common problems identify future priorities, thereby facilitating rapid materials.

Язык: Английский

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Unraveling Mechanism for Microstructure Engineering toward High‐Capacity Nickel‐Rich Cathode Materials

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 17, 2024

Abstract Microstructural engineering on nickel‐rich layered oxide (NRLO) cathode materials is considered a promising approach to increase both the capacity and lifespan of lithium‐ion batteries by introducing high valence‐state elements. However, rational regulation NRLO microstructures based deep understanding its enhancement mechanism remains challenging. Herein for first time, it demonstrated that an 14 mAh g −1 in reversible at cycle can be achieved via tailoring micro nano structure through tungsten. Aberration‐corrected scanning transmission electron microscopy (STEM) characterization reveals formation modified microstructure featured as coherent spinel twin boundaries. Theoretical modeling electrochemical investigations further demonstrate related such boundaries, which lower Li + diffusion barrier thus allow more participate deeper phase transitions. Meanwhile, surface grain boundaries NRLOs are found generating dense uniform LiW x O y phase, extends life reducing side reactions with electrolytes. This work enables comprehensive capacity‐increased endows remarkable potential microstructural capacity‐ lifespan‐increased NRLOs.

Язык: Английский

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Surface Engineering of Cathode Materials: Enhancing the High Performance of Lithium‐Ion Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Июнь 6, 2024

Abstract The development and application of lithium‐ion batteries present a dual global prospect opportunity challenge. With conventional energy sources facing reserve shortages environmental issues, have emerged as transformative technology over the past decade, owing to their superior properties. They are poised for exponential growth in realms electric vehicles storage. cathode, vital component batteries, undergoes chemical electrochemical reactions at its surface that directly impact battery's density, lifespan, power output, safety. Despite increasing density cathodes commonly encounter surface‐side with electrolyte exhibit low conductivity, which hinder utility high‐power energy‐storage applications. Surface engineering has compelling strategy address these challenges. This paper meticulously examines principles progress cathode materials, providing insights into potential advancements charting trajectory practical implementation.

Язык: Английский

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Precise modulation of surface lattice to reinforce structural stability of high-nickel layered oxide cathode by hafnium gradient doping

Energy storage materials, Год журнала: 2024, Номер 69, С. 103400 - 103400

Опубликована: Апрель 9, 2024

Язык: Английский

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Engineering strategies for high‐voltage LiCoO₂ based high‐energy Li‐ion batteries

Electron, Год журнала: 2024, Номер 2(3)

Опубликована: Май 12, 2024

Abstract To drive electronic devices for a long range, the energy density of Li‐ion batteries must be further enhanced, and high‐energy cathode materials are required. Among materials, LiCoO 2 (LCO) is one most promising candidates when charged to higher voltages over 4.3 V. However, high‐voltage LCO confronted with severe surface bulk issues inducing poor cyclic stability. completely unleash potential cathodes, more comprehensive theoretical understanding underlying necessary, along active exploration previous modifications. This paper mainly presents degradation mechanisms under high voltage, formation evolution electrolyte interface, engineering strategies employed enhance cell performance. By organizing summarizing these modifications, this work aims establish associations among common research suggest future priorities, thus facilitating rapid development LCO.

Язык: Английский

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Surface Li⁺/Ni²⁺ Antisite Defects Construction for Achieving High‐Voltage Stable Single‐Crystal Ni‐Rich Cathode by Anion/Cation Co‐Doping

Advanced Functional Materials, Год журнала: 2024, Номер 34(36)

Опубликована: Март 5, 2024

Abstract Ni‐rich cathode material possesses a considerable theoretical capacity, yet achieving their full capacity potential remains challenging. Elevating its operation voltage is an effective approach, while the stability of relatively poor, which limited by Li + /Ni 2+ mixing. Herein, strategy cation/anion co‐doping proposed for single‐crystal ultrahigh‐nickel LiNi 0.92 Co 0.04 Mn O 2 operated at 4.5 V. The enhancement mechanism explicitly revealed in situ/ex situ tests and theory calculations. Specifically, Mo 6+ F − are introduced to construct appropriate antisite defects structure particle surface, can maintain low‐defect layered channel inside bulk simultaneously, inducing stable access portal transport from cathode/electrolyte interface. More importantly, passivation layer on surface uphold Li‐layer optimize reactive behavior Ni , thus boosting interfacial reducing lattice mismatch. As result, it achieve high (204 mAh g −1 1 C) retention during long‐term high‐voltage measurements both half‐cell (87.1% after 200 cycles) full‐cell (91.9% 400 cycles). This facile provides feasible technical reference further exploiting ultrahigh‐capacity commercial application.

Язык: Английский

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