Non-Flammable Electrolyte Mediated by Solvation Chemistry toward High-Voltage Lithium-Ion Batteries

ACS Energy Letters, Год журнала: 2024, Номер 9(4), С. 1604 - 1616

Опубликована: Март 19, 2024

The development of nonflammable electrolytes can boost energy density and battery safety, especially for layered metal oxide cathodes operating at high voltage. However, most are designed in a concentration compatibility with graphite electrodes and/or less decomposition. Herein, we introduced solvation structure-mediated model to develop electrolyte based on trimethyl phosphate (TMP) solvent normal concentration. This advancement allows the || lithium cobalt full cell operate 4.5 V, delivering also exhibiting feature. achievement is realized using previously unreported components, including carbonate solvent, ethylene sulfate (DTD) additives, conventional LiPF6 salt. We analyzed molecular behaviors each composition uncovered impact DTD, highlighting its prerequisite conditions effectively weakening Li+-TMP interactions. bottom-up design strategy offers fresh perspective regulating structures formulations.

Язык: Английский

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Challenges and opportunities toward long-life lithium-ion batteries

Journal of Power Sources, Год журнала: 2024, Номер 603, С. 234445 - 234445

Опубликована: Март 29, 2024

Язык: Английский

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Variant‐Localized High‐Concentration Electrolyte without Phase Separation for Low‐Temperature Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(33)

Опубликована: Май 29, 2024

Abstract Dual‐ion batteries (DIBs) present great application potential in low‐temperature energy storage scenarios due to their unique dual‐ion working mechanism. However, at low temperatures, the insufficient electrochemical oxidation stability of electrolytes and depressed interfacial compatibility impair DIB performance. Here, we design a variant‐localized high‐concentration solvation structure for universal ( ν ‐LHCE) without phase separation via introducing an extremely weak‐solvating solvent with levels. The gives ‐LHCE enhanced stability. Meanwhile, can competitively participate Li + ‐solvated coordination, which improves transfer kinetics boosts formation robust interphases. Thus, electrolyte not only has good high‐voltage >5.5 V proper transference number 0.51 but also shows high ionic conductivities 1 mS/cm temperatures. Consequently, enables different types achieve excellent long‐term cycling rate capability both room Especially, capacity retentions are 77.7 % 51.6 %, −40 °C −60 °C, respectively, indicating applications, such as polar exploration, emergency communication equipment, station cold regions.

Язык: Английский

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Hydrogen-bonded micelle assembly directed conjugated microporous polymers for nanospherical carbon frameworks towards dual-ion capacitors

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 675, С. 1091 - 1099

Опубликована: Июль 6, 2024

Язык: Английский

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Trace ethylene carbonate-mediated low-concentration ether-based electrolytes for high-voltage lithium metal batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(15), С. 5613 - 5626

Опубликована: Янв. 1, 2024

A solubilization and stabilization effect of trace ethylene carbonate solvent assisted by the varied molecule-ion interaction was discovered in ether-based electrolyte, enabling 80 μm Li || LiNi 0.8 Co 0.1 Mn O 2 full-cell operate at 4.5 V stably.

Язык: Английский

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Intermolecular Interaction Mediated Potassium Ion Intercalation Chemistry in Ether‐Based Electrolyte for Potassium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(28)

Опубликована: Июнь 4, 2024

Abstract Electrolyte design is indeed a highly effective strategy to improve battery performance. However, identifying the intermolecular interaction in electrolyte solvation structure rarely reported potassium‐ion batteries. Herein, it discovered that solvent‐solvent can be formed when introducing cyclopentylmethyl ether (CPME) solvent into commonly used 1,2‐dimethoxyethane (DME)‐based electrolytes. Such not only analyzed by 2D 1 H‐ H correlation spectroscopy for first time but also found weaken K + ‐DME significantly, consequently enabling reversible (de‐)intercalation within graphite. By employing this without using any fluorine‐based solvent, new fluorine‐free and low‐concentration ether‐based designed, which compatible with graphite facilitates of high‐energy‐density safe potassium ion sulfur A novel molecular interfacial model further presented analyze behaviors ‐solvent‐anion complexes on electrode surface are affected interactions, elucidating reasons behind superior compatibility performance at scale. This work sheds some light critical role solvent–solvent interactions batteries provides valuable insights engineering enhancing electrolytes

Язык: Английский

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Organic Electrode Materials for Energy Storage and Conversion: Mechanism, Characteristics, and Applications

Accounts of Chemical Research, Год журнала: 2024, Номер 57(10), С. 1550 - 1563

Опубликована: Май 9, 2024

ConspectusLithium ion batteries (LIBs) with inorganic intercalation compounds as electrode active materials have become an indispensable part of human life. However, the rapid increase in their annual production raises concerns about limited mineral reserves and related environmental issues. Therefore, organic (OEMs) for rechargeable once again come into focus researchers because design flexibility, sustainability, compatibility. Compared conventional cathode Li batteries, OEMs possess some unique characteristics including flexible molecular structure, weak intermolecular interaction, being highly soluble electrolytes, moderate electrochemical potentials. These make suitable applications multivalent low-temperature redox flow decoupled water electrolysis. Specifically, structure interaction ions easily accessible to sites facilitate desolvation process on site, thus improving performance, while nature enables couples aqueous batteries. Finally, potential reversible proton storage release them mediators Over past ten years, although various new been developed Li-organic Na-organic Zn-organic other battery systems, still face many challenges, such poor cycle stability, inferior energy density, rate capability. previous reviews mainly focused or strategies improve performance OEMs. A comprehensive review explore establish correlation between these specific application conversion is lacking.In this Account, we initially provide overview sustainability friendliness conversion. Subsequently, summarize charge mechanisms different types Thereafter, comparison structural high solubility electrolyte, appropriate order correlations applications. Unlike that introduce progress Account specifically focuses exceptional corresponding conversion, previously published by our groups. include monovalent OEMs, electrolysis employing electrodes mediators. We hope will invaluable contribution development next-generation help unlock a world

Язык: Английский

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Molybdenum dialkyphosphorodithioate-derived artificial solid-electrolyte interface enabling stable lithium metal anodes

Energy storage materials, Год журнала: 2024, Номер 65, С. 103185 - 103185

Опубликована: Янв. 14, 2024

Язык: Английский

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Superior High‐Rate Ni‐Rich Lithium Batteries Based on Fast Ion‐Desolvation and Stable Solid‐Electrolyte Interphase

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

The fast charging-discharging performance of power batteries has very practical significance. In terms electrochemistry, this requires and stable kinetics for electrochemical reaction processes. Despite the great complexity kinetics, it is clear that lithium-ion desolvation a subsequent step crossing through cathode-electrolyte interphase (CEI) are crucial to high-rate performance, in which two key steps depend heavily on working electrolyte formula. work, customized developed coordinate ion formation by introducing vinylene carbonate (VC), triphenylboroxin (TPBX), fluoroethylene (FEC) but excluding ethylene (EC). Serving Ni-rich cathodes, generates double-layered CEI, LiF-dominated inorganics inner layer, ROCOOLi-dominated organics outer not only efficient lithium transport. Meanwhile, PF6-${\mathrm{PF}}_6^ - $ -dominated solvation structure induced effectively decreases energy 29.72 kJ mol-1, supporting transport cathode interfacial Consequently, battery achieves long cycle at superior high rate 10 C.

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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