Опубликована: Фев. 28, 2025
Язык: Английский
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Март 6, 2024
Abstract Constraining the electrochemical reactivity of free solvent molecules is pivotal for developing high-voltage lithium metal batteries, especially ether solvents with high Li compatibility but low oxidation stability ( <4.0 V vs + /Li). The typical concentration electrolyte approach relies on nearly saturated coordination to molecules, which confronted severe side reactions under voltages >4.4 V) and extensive exothermic between reactive anions. Herein, we propose a molecular anchoring restrict interfacial in diluted electrolytes. hydrogen-bonding interactions from effectively suppress excessive enhances nickel rich cathodes at 4.7 V, despite extremely /ether molar ratio (1:9) absence anion-derived interphase. Furthermore, processes thermal abuse conditions are mitigated due reduced anions, postpones battery runaway.
Язык: Английский
Процитировано
43
Advanced Functional Materials, Год журнала: 2024, Номер 34(16)
Опубликована: Янв. 2, 2024
Abstract Widening the voltage window of nickel‐rich layered oxide cathode‐based lithium metal batteries (LMBs) can effectively improve energy density rechargeable batteries. However, serious safety issues associated with high reactivity between LiNi 0.8 Co 0.1 Mn O 2 (NCM811) and electrolyte at cut‐off remains challenging. Herein, a flame‐retardant ability to form robust armor‐like electrode interphase (EEI) LiF Li x B y z compounds for stabilizing Li||NCM811 is proposed. Such exhibits thermal stability effect ensuring battery voltage. The EEI protect both NCM811 (Li) improving cycling performance. As result, capacity retention rate cathode such reached 68% after 150 cycles 4.6 V. This work provides an effective reference reasonable design high‐voltage, electrolytes LMBs.
Язык: Английский
Процитировано
36
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Май 1, 2024
Abstract Li‐ion batteries are essential technologies for electronic products in the daily life. However, serious fire safety concerns that closely associated with flammable liquid electrolyte remains a key challenge. Tremendous effort has been devoted to designing nonflammable electrolytes. It is critical gain comprehensive insights into nonflammability design and inspire more efficient approaches building safer batteries. This review presents current mechanistic understanding of issues discusses state‐of‐the‐art electrolytes based on molecule, solvation, battery compatibility level. Various test methods discussed reliable risk evaluation. Finally, challenges perspectives summarized.
Язык: Английский
Процитировано
22
Progress in Materials Science, Год журнала: 2024, Номер 142, С. 101232 - 101232
Опубликована: Янв. 21, 2024
Язык: Английский
Процитировано
20
Energy & Environmental Science, Год журнала: 2024, Номер 17(15), С. 5451 - 5460
Опубликована: Янв. 1, 2024
A COF has been successfully fabricated onto carbon nanotubes as a cathode in LIBs with high energy density of 737.5 W h g −1 , representing the highest one among thus far reported LIB cathodes.
Язык: Английский
Процитировано
19
Nature Energy, Год журнала: 2024, Номер 9(12), С. 1463 - 1473
Опубликована: Окт. 7, 2024
Язык: Английский
Процитировано
19
Advanced Energy Materials, Год журнала: 2023, Номер 13(28)
Опубликована: Май 10, 2023
Abstract The evolution of high‐energy‐density lithium‐ion batteries (LIBs) urgently requires the development high‐safety electrolytes with high voltage resistance. Here, noncoordinating flame retardant pentafluoro‐(phenoxy)‐cyclotriphosphazene (FPPN) endows propylene carbonate (PC, 70 vol%)‐based graphite anode compatibility, non‐flammability, stability, and excellent separator/electrode wettability. Theoretical calculations reveal that FPPN significantly affects Li + ‐PC‐anion interactions favors desolvation. Based on in situ optical microscopy differential electrochemical mass spectrometry, it is innovatively proposed large amounts H 2 C 3 6 from PC decomposition play a dominant role destroying graphitic structure. dramatically alleviated totally suppressed, respectively, when prevents PC‐induced exfoliation. More encouragingly, an optimized PC/FPPN‐based electrolyte (70 vol% PC) enables LiCoO /graphite pouch cell (4.35 V, ≈2.6 Ah, ≈242 Wh kg −1 ) cycle life safety. This work deepens understanding PC‐graphite compatibility opens new avenue realizing practical application PC‐based (PC content over 50 vol%) capacity (over Ah) LIBs.
Язык: Английский
Процитировано
27
Advanced Functional Materials, Год журнала: 2024, Номер 34(19)
Опубликована: Янв. 9, 2024
Abstract The compatibility of lithium metal with organic solvents is the most crucial for batteries (LMBs). Even though ether show excellent toward metal, reactivity at elevated temperatures and high voltages hinders their utilization in battery systems. In this study, a high‐temperature electrolyte designed comprising oxalyldifluoroborate (LiODFB), diethylene glycol dibutyl (DGDE), 3‐methoxypropionitrile (MPN), fluorinated ethylene carbonate (FEC), which abbreviated as MDF electrolyte. presence MPN changes solvation structure, thereby facilitating increased redox reactions ODFB − synergizing FEC to build robust solid interface (SEI), effectively inhibiting dendrites growth solvent decomposition. Consequently, exhibits not only long cyclic stability coulombic efficiency Li||Cu Li||Li cells but also characteristics both Li||LiFePO 4 (LFP) Li||LiNi 0.8 Co 0.1 Mn O 2 (NCM811) cells. Remarkably, these demonstrate stable operation even when exposed higher up 80 °C, while Li||NCM811 cell maintains consistent an voltage level 4.5 V.
Язык: Английский
Процитировано
14
Nano-Micro Letters, Год журнала: 2024, Номер 16(1)
Опубликована: Фев. 19, 2024
The pursuit of safer and high-performance lithium-ion batteries (LIBs) has triggered extensive research activities on solid-state batteries, while challenges related to the unstable electrode-electrolyte interface hinder their practical implementation. Polymer been used extensively improve cathode-electrolyte in garnet-based all-solid-state LIBs (ASSLBs), it introduces new concerns about thermal stability. In this study, we propose incorporation a multi-functional flame-retardant triphenyl phosphate additive into poly(ethylene oxide), acting as thin buffer layer between LiNi
Язык: Английский
Процитировано
14
Journal of Power Sources, Год журнала: 2024, Номер 623, С. 235457 - 235457
Опубликована: Сен. 20, 2024
Язык: Английский
Процитировано
11