Lithium Storage Behavior of Expanded Microcrystalline Graphite/Fe₂O₃ Anode for Lithium-Ion Batteries

ACS Omega, Год журнала: 2025, Номер 10(17), С. 17673 - 17683

Опубликована: Апрель 23, 2025

Driven by the pressing need for improved performance of lithium-ion batteries in electric vehicles and portable electronics, this research aims to develop novel high-performance anode materials. Innovatively, expanded microcrystalline graphite (EMG) is used as matrix material. Through a simple synthesis strategy, Fe2O3 nanoparticles are successfully introduced prepare EMG/Fe2O3 composites. The study systematically investigates effects different doping ratios on electrochemical experimental results demonstrate that EMG/Fe2O3-2 composite material exhibits most excellent lithium storage performance: initial discharge specific capacity 1114.10 mAh·g-1, after 100 cycles, remains at 1007.05 with retention rate high 90.39%. outstanding mainly attributed following factors. On one hand, porous structure EMG not only provides an effective buffering space volume expansion Fe2O3, but its complex conductive network also significantly enhances charge transport efficiency other theoretical nanoparticles, combined matrix, forms synergistic effect This thesis elucidates mechanism between new strategies perspectives breakthrough battery

Язык: Английский

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Ultra‐Low Content Triethylammonium Chloride Facilitates Localized High‐Concentration Electrolytes and Formation of Inorganic Solid Electrolyte Interface

Energy & environment materials, Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Localized high‐concentration electrolytes offer a potential solution for achieving uniform lithium deposition and stable solid‐electrolyte interface in Lithium metal batteries. However, the use of highly concentrated salts or structure‐loaded diluents can result significantly higher production costs increased environmental burdens. Herein, novel localized electrolyte is developed, comprising ultra‐low content (2% by mass) triethylammonium chloride as an additive. The Lewis acid structure molecule allows adsorption numerous solvent molecules TFSI − anions, intensifying electrostatic interactions between ions anions. introduced TC, along with integrate into sheath, forming LiCl‐rich inorganic SEI enhancing electrochemical performance anode. improved Li||Li cell shows excellent cycling stability over 500 h at 1 mA cm 2 27 mV overpotential. This work provides insights impact additives on electrode‐electrolyte Li‐ion solvation, crucial safer battery development.

Язык: Английский

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Co-Modification of TiNb2O7 with Graphene Derivatives and Pluronic F127 for Enhanced Lithium-Ion Battery Anodes

Results in Engineering, Год журнала: 2025, Номер unknown, С. 105254 - 105254

Опубликована: Май 1, 2025

Язык: Английский

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A lithium-ion batteries SOH estimation method based on extracting new features during the constant voltage charging stage and improving BPNN

PLoS ONE, Год журнала: 2025, Номер 20(5), С. e0324868 - e0324868

Опубликована: Май 23, 2025

Existing state of health (SOH) estimation methods for lithium-ion batteries predominantly extract features (HF) from constant current (CC) and voltage (CV) charging phases. Nevertheless, CC phase feature extraction is susceptible to the randomness initial stage. By contrast, data during stage are preserved intact. The complexity noise interference battery make it difficult accurately features, necessary develop effective process representative features. In response this issue, paper proposes an SOH method extracting HF at end CV optimizes Backpropagation Neural Network (BPNN). Firstly, curve was transformed into differential (dQ/dI curve), which two HFs were extracted. Secondly, addressing issue weight threshold initialization in BPNN, Coati Optimization Algorithm (COA) employed optimize network (COA-BPNN). Finally, validation conducted using publicly available datasets. experimental results demonstrate that proposed exhibits high accuracy estimating under various environmental temperatures rate conditions. Compared with traditional BPNN method, COA-BPNN reduces maximum root mean square error average absolute estimated 0.22% 0.16%, respectively.

Язык: Английский

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Challenges and Issues Facing Ultrafast-Charging Lithium-Ion Batteries

Batteries, Год журнала: 2025, Номер 11(6), С. 209 - 209

Опубликована: Май 26, 2025

Ultrafast-charging (UFC) technology for electric vehicles (EVs) and energy storage devices has brought with it an increase in demand lithium-ion batteries (LIBs). However, although they pose advantages driving range charging time, LIBs face several challenges such as mechanical degradation, lithium dendrite formation, electrolyte decomposition, concerns about thermal runaway safety. This review evaluates the key advances LIB components (anodes, cathodes, electrolytes, separators, binders), alongside innovations protocols safety concerns. Material-level solutions nanostructuring, doping, composite architectures are investigated to improve ion diffusion, conductivity, electrode stability. Electrolyte modifications, separator enhancements, binder optimizations discussed terms of their roles reducing high-rate degradation. Furthermore, addressed; adjustments can reduce electrochemical stress on LIBs, decreasing capacity fade while providing rapid charging. highlights technological advancements that enabling ultrafast assisting us overcoming severe limitations, paving way development next-generation high-performance LIBs.

Язык: Английский

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