Wide Temperature Electrolytes for Lithium Batteries: Solvation Chemistry and Interfacial Reactions

Small Methods, Год журнала: 2024, Номер 8(11)

Опубликована: Апрель 22, 2024

Abstract Improving the wide‐temperature operation of rechargeable batteries is crucial for boosting adoption electric vehicles and further advancing their application scope in harsh environments like deep ocean space probes. Herein, recent advances electrolyte solvation chemistry are critically summarized, aiming to address long‐standing challenge notable energy diminution at sub‐zero temperatures rapid capacity degradation elevated (>45°C). This review provides an in‐depth analysis fundamental mechanisms governing Li‐ion transport process, illustrating how these insights have been effectively harnessed synergize with high‐capacity, high‐rate electrodes. Another critical part highlights interplay between interfacial reactions, as well stability resultant interphases, particularly employing ultrahigh‐nickel layered oxides cathodes high‐capacity Li/Si materials anodes. The detailed examination reveals factors pivotal mitigating fade, thereby ensuring a long cycle life, superior rate capability, consistent high‐/low‐temperature performance. In latter part, comprehensive summary situ/operational presented. holistic approach, encompassing innovative design, interphase regulation, advanced characterization, offers roadmap battery technology extreme environmental conditions.

Язык: Английский

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A Lithium‐Affinitive Covalent Organic Polymer Network Functionalized Separator for Dendrite‐Free and High‐Durability Lithium–Sulfur Batteries under Harsh Conditions

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Май 7, 2024

Abstract Lithium–Sulfur (Li─S) batteries are renowned for their high theoretical specific capacity and cost‐effectiveness. Nevertheless, performance could be impeded by obstacles including lithium dendrite growth polysulfide (LiPS) shuttle, particularly under harsh conditions. Herein, an economical strategy is reported modifying polyolefin separators (PP) with covalent organic polymer networks (TPE) to alter Li solvent structure, enhance lithium‐ion transport, suppress shuttle effects. Combining in situ/ex situ characterization calculations, it demonstrated that the lithiophilic groups (‐C═N‐) TPE@PP separator form strong interaction lithium, facilitating dissociation of Li─Solvent/LiPS‐solvent release freer ion shape a stable solid electrolyte interface rich LiF 3 N. The network serves as “highway” accelerates transport promotes uniform nucleation behavior. Therefore, Li|TPE@PP|CNT/S cell enables 60% retention after 2000 cycles at 1.0 C exhibits cycling 100 from ‐40 80 °C. Moreover, pouch maintains more than 600 mA h g −1 30 0 This study provides promising avenue application high‐performance environment perspective engineering.

Язык: Английский

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Regulating Grafting Density to Realize High‐Areal‐Capacity Silicon Submicroparticle Anodes Under Ultralow Binder Content

Small, Год журнала: 2024, Номер 20(27)

Опубликована: Фев. 2, 2024

Abstract Grafted biopolymer binders are demonstrated to improve the processability and cycling stability of silicon (Si) nanoparticle anodes. However, there is little systematical exploration regarding relationship between grafting density performance grafted binder for Si anodes, especially when particles exceed critical breaking size. Herein, a series guar gum polyacrylamide (GP) with different densities designed prepared determine optimal maximizing electrochemical submicroparticle (SiSMP) Among various GP binders, GP5 recommended demonstrates strongest adhesion strength, best mechanical properties, highest intrinsic ionic conductivity. These characteristics enable SiSMP electrodes sustain electrode integrity accelerate lithium‐ion transport kinetics during cycling, resulting in high capacity stable cyclability. The superior role enabling robust structure interface revealed through PeakForce atomic force microscopy situ differential mass spectrometry. Furthermore, cyclabilities high‐loading SiSMP@GP5 ultralow content (1 wt%) at areal as well good cyclability Ah‐level LiNi 0.8 Co 0.1 Mn O 2 /SiSMP@GP5 pouch cell strongly confirms practical viability binder.

Язык: Английский

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Microscopic electrochemical–mechanical coupling in layered cathodes under high-voltage and fast-charging conditions

EES batteries., Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This review examines electrochemical-mechanical coupling in layered oxide cathodes, linking delithiation-induced electrochemical degradation to anisotropic mechanical strain, while summarizing recent advances cathode material modifications.

Язык: Английский

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Solvent-derived organic-rich SEI enables capacity enhancement for low-temperature lithium metal batteries

Joule, Год журнала: 2025, Номер unknown, С. 101823 - 101823

Опубликована: Фев. 1, 2025

Язык: Английский

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