Multi-scale design of silicon/carbon composite anode materials for lithium-ion batteries: A review

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 97, P. 30 - 45

Published: May 29, 2024

Language: Английский

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Suppressing Intergranular Cracking with Near-Surface Layer Regulation for Electrochemical-Thermal Stabilization of LiCoO2

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

To further meet the application needs of lithium-ion batteries, developing cathodes with higher voltage and operating temperatures has become a primary goal. However, LiCoO2 encounter structural issues, particle fracture, side reactions during high-voltage high-temperature cycling. Thus, this work designs novel interface engineering approach involving near-surface Li layer regulation enhances stability R3̄m layered structure, suppressing intergranular cracking. An undistorted surface reduced phase transitions was revealed by HAADF-STEM. The post-cycle simulations XRD stabilizes interplanar spacing. strong B-O bonds lower O 2p energies, preventing oxygen loss confirmed XPS band structure. Therefore, even under 50 °C, half-cell maintains capacity retention rate 79% after 200 cycles at 5C 4.5 V.

Language: Английский

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Formation of N‐Doped Carbon Nanofibers Decorated with MoP Nanoflakes for Dendrite‐Free Lithium Metal Anode

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: May 7, 2024

Abstract Metallic lithium (Li) is recognized as a promising candidate for anode material of Li‐ion batteries owing to high theoretical specific capacity and low redox potential. However, uncontrollable dendrite growth huge volume expansion during Li plating/stripping processes hinder its practical application. Herein, N‐doped carbon nanofibers@MoP nanoflakes (NCNF@MoP) developed potential host address the above challenges. During formation solid electrolyte interphase, MoP can be changed into metallic Mo with lithiophilicity 3 P ionic conductivity. The whole composite transformed mixed ion/electron conducting network reduce nucleation overpotential accelerate diffusion kinetics at electrode/electrolyte interface. As proof concept, symmetric cell using NCNF@MoP presents long‐term cycling up 2500 h 10 mV 1 mA cm −2 . Additionally, Li‐NCNF@MoP||LiFePO 4 full demonstrates good retention 92.6% over 2200 cycles current density 5 C (1 = 169 g −1 ).

Language: Английский

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Anion‐Reduction‐Catalysis Induced LiF‐Rich SEI Construction for High‐Performance Lithium‐Metal Batteries

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

Published: Sept. 3, 2024

Abstract The practical application of lithium‐metal batteries (LMBs) remains impeded by uncontrollable Li dendrite growth and unstable solid‐state electrolyte interphase (SEI) on anodes. Constructing the inorganic‐rich SEI is considered as an effective strategy to realize dense deposition inhibit interfacial side reactions, thereby improving lifespans LMBs. Herein, anion‐reduction‐catalysis mechanism proposed design a LiF‐rich utilizing 2D tellurium (Te) nanosheets catalysts, which are homogenously implanted substrate. Lithiophilic Te can induce uniform nucleation through in situ lithiation while resulting product 2 reduce energy barrier for anion decomposition promote generation LiF SEI. Consequently, reactions effectively suppressed, enabling long‐cycle‐life Te‐modified electrode half‐cells delivers superior cycle life exceeding 500 cycles high average Coulombic efficiency 97.8% at 5 mAh cm −2 . high‐energy‐density (405 Wh kg −1 ) pouch cells pairing anodes with high‐mass‐loading LiNi 0.9 Co 0.05 Mn O (NCM90) cathodes exhibit stable cycling performance 99.3% carbonate electrolytes. This work provides promising catalyst paves way developing

Language: Английский

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Revitalizing Lithium Metal Batteries: Strategies for Tackling Dead Lithium Formation and Reactivation

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 13, 2024

Abstract Lithium (Li) metal batteries (LMBs) are among the most promising candidates for future battery technology due to their high theoretical capacity and energy density. However, formation of dendritic Li, characterized by needle‐like structures, poses serious safety issues. To address this, numerous methods developed prevent Li dendrite formation. Another significant challenge in LMBs is inactive known as dead which significantly impacts Coulombic efficiency overall performance. This review explores issues surrounding LMBs, specifically focusing on electrically isolated repeatedly generated solid electrolyte interphase (SEI). Advanced techniques characterizing discussed, alongside various strategies designed activate or suppress thus restoring capacity. The summarizes recent advancements research related activation, reuse, prevention offering valuable insights enhancing LMBs. comprehensive overview provides fundamental guidance practical application anodes similar batteries.

Language: Английский

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Dielectric Increment of Electrolytes Mediated by Ion Association for Lithium–Sulfur Batteries

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

Published: Feb. 11, 2025

Abstract Electrolyte engineering for long‐lifespan alkali‐based batteries focuses on modulating the solvation structure to build electrode/electrolyte interface and dictate interfacial reactions. Previous strategies have relied increasing salt concentration introduce anion‐derived solid electrolyte interphase (SEI) considerable stability, but these are restricted by poor solubility of film‐forming salts in weak electrolytes. Herein, a dielectric increment electrolytes based ion dissociation association chemistry is proposed realize high solubility. Differing from decrement with addition strong owing reduced free solvents, result surplus polarization contact pairs (CIPs). As demonstration salt‐concentration‐sensitive lithium–sulfur (Li–S) batteries, CIPs facilitate lithium polysulfides (LiPSs) promote Li 2 S /Li nucleation. The CIP‐induced yields 96% capacity retention after 175 cycles at 0.2 C Li–S cell. This underexplored strategy provides effective guidelines design dielectric‐constant‐mediated battery applications.

Language: Английский

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Insertion Type Li₃VO₄ Lithiophilic Sites Boosting Dendrite‐Free Lithium Deposition in Trapping‐and‐leveling Model

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

Published: Feb. 19, 2025

Abstract Lithium (Li) metal batteries offer high energy densities but suffer from uncontrolled lithium deposition, causing serious dendrite growth and volume fluctuation. Tailorable Li nucleation uniform early‐stage plating are essential for homogenous deposition. Herein, insertion type 3 VO 4 is first demonstrated as efficient lithiophilic sites trapping + ions nucleation. By homogenizing the distribution of electric field flux via an ingenious architecture design with nanodots grown on carbon fibers (LVO@CNFs), leveling deposition after also realized. These, together, result in smooth dendrite‐free LVO@CNFs a trapping‐and‐leveling model, giving rise to unprecedented performance (highly stable plating/stripping exceeding 2500 h at 2 mA cm −2 under capacity, high‐capacity retention 82.5% over 500 cycles Li@LVO@CNFs//LiFePO battery). The successful host insertion‐type may pave new way long lifespan batteries.

Language: Английский

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Sulfone-Based Cosolvents Stabilize PF₆^– to Enable High-Voltage Lithium Metal Batteries

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Language: Английский

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Thermal safety overview of silicon-carbon anode in lithium-ion batteries: Key parameters in determining the reactivity

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

Published: March 1, 2025

Language: Английский

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Electrostatic Catalysis‐Driven Asymmetric SEI for Dendrite‐Free Lithium Metal Anodes

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

Published: May 13, 2025

Abstract The practical application of lithium metal anodes is hindered by uncontrolled dendrite growth, which compromises battery safety and cyclability. Conventional strategies focus on modifying electrolyte compositions or interfacial coatings but fail to fundamentally regulate deposition at the nanoscale. Here, Electrostatic catalysis‐driven asymmetric solid‐electrolyte interphase (SEI) formation, achieved via a pulsed positive voltage pretreatment, introduced. This process induces site‐selective decomposition components, generating LiF‐rich SEI flat surfaces Li 2 O‐rich in surface pits, thereby directing plating into pits suppressing formation. Experimental computational studies reveal that electrostatic enrichment PF 6 − anions positively charged interfaces accelerates their decomposition, while pit regions, depleted anions, promote solvent‐derived O Lithium with this exhibit stable cycling for over 350 h 1 mA cm −2 , outperforming conventional SEI. Full cells paired LiCoO (LCO) cathodes achieve 96.1% capacity retention after 400 cycles C, compared 56.8% These findings introduce catalysis as powerful engineering strategy, enabling high‐performance batteries through precise control.

Language: Английский

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