A comprehensive review of foreign-ion doping and recent achievements for nickel-rich cathode materials

Energy storage materials, Год журнала: 2023, Номер 57, С. 14 - 43

Опубликована: Фев. 4, 2023

Язык: Английский

---

High-entropy doping promising ultrahigh-Ni Co-free single-crystalline cathode toward commercializable high-energy lithium-ion batteries

Science Advances, Год журнала: 2024, Номер 10(25)

Опубликована: Июнь 21, 2024

The development of advanced layered Ni-rich cathodes is essential for high-energy lithium-ion batteries (LIBs). However, the prevalent are still plagued by inherent issues chemomechanical and thermal instabilities limited cycle life. For this, here, we introduce an efficient approach combining single-crystalline (SC) design with in situ high-entropy (HE) doping to engineer ultrahigh-Ni cobalt-free cathode LiNi

Язык: Английский

---

Tungsten Boride Stabilized Single‐Crystal LiNi _0.83 Co _0.07 Mn _0.1 O ₂ Cathode for High Energy Density Lithium‐Ion Batteries: Performance and Mechanisms

Advanced Functional Materials, Год журнала: 2023, Номер 33(27)

Опубликована: Апрель 17, 2023

Abstract Transition metal doped LiNiO 2 layered compounds have attracted significant interest as cathode materials for lithium‐ion batteries (LIBs) in recent years due to their high energy density. However, a critical issue of ‐based cathodes is caused particularly at highly delithiated state by irreversible phase transition, initiation/propagation cracks, and extensive reactions with electrolyte. Herein, tungsten boride (WB)‐doped single‐crystalline LiNi 0.83 Co 0.07 Mn 0.1 O (SNCM) reported that affectively addresses these drawbacks. In situ/ex situ microscopic spectroscopic evidence B 3+ enters the bulk SNCM, enlarging interlayer spacing, thus facilitating Li + diffusion, while W forms an amorphous surface layer consisting x y z (LWO) (LBO), which aids construction robust cathode‐electrolyte interphase (CEI) film, are shown. It also shown WB doping effective controlling degree c‐axis contraction release oxygen‐containing gases voltages. The best concentration 0.6 wt.%, capacity retention rate SNCM reaches 93.2% after 200 cycles 2.7–4.3 V, morphology structure material remain largely unchanged. presented modification strategy offers new way design stable high‐energy‐density LIBs.

Язык: Английский

---

Achieving Thermodynamic Stability of Single‐Crystal Co‐Free Ni‐Rich Cathode Material for High Voltage Lithium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 33(23)

Опубликована: Март 15, 2023

Abstract Ni‐rich layered cathode materials are progressively considered as the standard configuration of high‐energy electric vehicles by virtues their high capacity and eliminated “range anxiety.” However, poor cyclic stability severe cobalt supply crisis would restrain wide commercial applicability. Here, a cost‐effective single‐crystal Co‐free material LiNi 0.8 Mn 0.18 Fe 0.02 O 2 (NMF), which outperforms widely polycrystalline 0.83 Co 0.11 0.06 (MNCM) (SNCM) is reported. Surprisingly, NMF can compensate for reversible loss under designed conditions high‐temperature elevated‐voltage, achieving competitive energy density compared with conventional MNCM or SNCM. Combining operando characterizations functional theory calculation, it revealed that improved dynamic structure evolution largely alleviates mechanical strain issue commonly found in cathode, reduce formation intragranular cracks improve safety performance. Consequently, this new achieve perfect equilibrium between cost electrochemical performance, not only reduces production >15%, but also demonstrates excellent thermal cycling performance..

Язык: Английский

---

Mitigating Planar Gliding in Single‐Crystal Nickel‐Rich Cathodes through Multifunctional Composite Surface Engineering

Advanced Energy Materials, Год журнала: 2024, Номер 14(12)

Опубликована: Фев. 22, 2024

Abstract Nickel‐rich layered oxides are a class of promising cathodes for high‐energy‐density lithium‐ion batteries (LIBs). However, their structural instability derived from crystallographic planar gliding and microcracking under high voltages has significantly hindered practical applications. Herein, resurfacing engineering single‐crystalline LiNi 0.83 Co 0.07 Mn 0.1 O 2 (SNCM) cathode is undertaken. A passivation shell, comprising surface fast ion conductor Li 1.25 Al 0.25 Ti 1.5 4 (LATO) layer near‐surface confined cation hybridization region, established through co‐infiltrating into SNCM, which can profoundly improve stability. Compelling evidences show that high‐conductivity LATO‐overcoat facilitates + conduction resists electrolyte attack. The introduction strong Al─O bonds regions stabilize bulk lattice oxygen respectively during cycling, thus hindering the formation vacancies occurrence detrimental phase transformations, ultimately suppressing nanocracking. Subsequently, modified SNCM drastically outperforms baseline exhibiting an ultrahigh 88.9% retention rate original capacity at 1.0C after 400 cycles, discharge 146.8 mAh g −1 with 92.6% 200 cycles 5.0C within voltage window 2.7–4.3 V. performance demonstrated by multifunctional coating highlights new way to Ni‐rich LIBs.

Язык: Английский

---

Mitigated Oxygen Loss in Lithium‐Rich Manganese‐Based Cathode Enabled by Strong Zr–O Affinity

Advanced Functional Materials, Год журнала: 2024, Номер 34(23)

Опубликована: Фев. 10, 2024

Abstract Oxygen loss is a serious problem of lithium‐rich layered oxide (LLO) cathodes, as the high capacity LLO relies on reversible oxygen redox. release can occur at surface leading to formation spinel or rock salt structures. Also, lattice will usually become unstable after long cycling, which remains major roadblock in application LLO. Here, it shown that Zr doping an effective strategy retain due affinity between and O. A simple sol‐gel method used dope 4+ into LLOs adjust local electronic structure inhibit diffusion anions during cycling. Compared with untreated LLOs, LLO–Zr cathodes exhibit higher cycling stability, 94% retention 100 cycles 0.4 C, up 223 mAh g −1 1 88% 300 cycles. Theoretical calculations show strong Zr–O covalent bonding, energy vacancies has effectively increased under voltage be suppressed. This study provides for developing high‐capacity cyclability Li‐rich cathode materials lithium‐ion batteries.

Язык: Английский

---

Insights into Cation Migration and Intermixing in Advanced Cathode Materials for Lithium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 29, 2024

Abstract Cathode materials are the core components of lithium‐ion batteries owing to determination practical voltage and effective energy battery system. However, advanced cathodes have faced challenges related cation migration intermixing. In this review, study summarizes structural failure mechanisms due mixing cathodes, including Ni‐rich Li‐rich layered spinel, olivine, disordered rock‐salt materials. This review starts by discussing degradation caused intermixing in different focusing on electronic structure, crystal electrode structure. Furthermore, optimization strategies for inhibition rational utilization systematically encapsulated. Last but not least, remaining proposed perspectives highlighted future development cathodes. The accurate analysis using characterization, precise control material synthesis, multi‐dimensional synergistic modification will be key research areas provides a comprehensive understanding emerge as pivotal controllable factors further

Язык: Английский

---

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

---

Optimized In Situ Doping Strategy Stabling Single-Crystal Ultrahigh-Nickel Layered Cathode Materials

ACS Nano, Год журнала: 2024, Номер 18(11), С. 8002 - 8016

Опубликована: Март 7, 2024

Single-crystal Ni-rich cathodes offer promising prospects in mitigating intergranular microcracks and side reaction issues commonly encountered conventional polycrystalline cathodes. However, the utilization of micrometer-sized single-crystal particles has raised concerns about sluggish Li+ diffusion kinetics unfavorable structural degradation, particularly high Ni content Herein, we present an innovative situ doping strategy to regulate dominant growth characteristic planes precursor, leading enhanced mechanical properties effectively tackling challenges posed by ultrahigh-nickel layered Compared with traditional dry-doping method, our approach possesses a more homogeneous consistent modifying effect from inside out, ensuring uniform distribution ions large radius (Nb, Zr, W, etc). This mitigates generally unsatisfactory substitution effect, thereby minimizing undesirable coating layers induced different solubilities during calcination process. Additionally, uniformly dispersed this are beneficial for alleviating two-phase coexistence H2/H3 optimizing concentration gradient cycling, thus inhibiting formation intragranular cracks interfacial deterioration. Consequently, doped demonstrate exceptional cycle retention rate performance under various harsh testing conditions. Our optimized not only expands application elemental but also offers research direction developing high-energy-density extended lifetime.

Язык: Английский

---

A Comprehensive Review of the Research Progress on the Low‐Temperature Performance of LiFePO₄ Batteries

Carbon Neutralization, Год журнала: 2025, Номер 4(2)

Опубликована: Фев. 21, 2025

ABSTRACT Lithium iron phosphate (LiFePO 4 ) serves as a commonly used cathode material in lithium‐ion batteries and is an essential power source for consumer electronics electric vehicles. Nevertheless, significant degradation its electrochemical performance occurs at low temperatures, leading to energy losses, challenges charging, reduced lifespan, heightened safety concerns—critical factors LiFePO applications. This review outlines recent progress aimed enhancing the low‐temperature of batteries, concentrating on mechanisms involved various modification strategies. The primary contributing subzero temperatures are first examined. A variety strategies designed improve interfacial internal reaction kinetics cathodes under cold conditions emphasized, feasible approaches also presented. These include optimizing cell design enhance inherent reactivity employing heating techniques raise external temperatures. In conclusion, this discusses limitations associated with settings examines advancements from system level. insights provided intended motivate further developments other technologies tailored

Язык: Английский

---