Boosting Low-Temperature Performance for Lithium Batteries with Controllable Solvation Structure Electrolytes

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Lithium metal batteries (LMBs) have attracted more attention for their high energy densities. Their applications are limited the poor low temperature (LT) cycle performance and growth of dendrite due to root problems Li+ desolvation barrier electrode/electrolyte interface. Here, an electrolyte was prepared using dielectric constant solvents ethyl acetate (EA), 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether (D2), voltage endurance lithium salt difluoro(oxalato)borate (LiDFOB), which exhibits ionic conductivity 1 mS/cm even at −50 °C superior tolerance. Moreover, fluoroethylene carbonate (FEC) is further introduced realize temperature-responsive solvation structure, induces enriched inorganic solid interphase (SEI) film homogeneous deposition. Therefore, Li∥NCM87 not only deliver outstanding ambient (89% capacity retention after 290 cycles) but also can operate LT −40 40 cycles with a stable 120 mA h/g. This work enlighten development design operating under extreme conditions.

Language: Английский

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Engineering the local micro-environment of active materials in rechargeable alkali metal based batteries

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 533, P. 216525 - 216525

Published: Feb. 21, 2025

Language: Английский

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Defect-Modulated MOF Nanochannels for the Quasi-Solid-State Electrolyte of a Dendrite-Free Lithium Metal Battery

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

Efficient and selective Li+ transport within the nanochannel is essential for high-performance solid-state electrolytes (SSEs) in lithium metal batteries. Introducing hopping sites into SSEs shows great potential promoting transport; however, it typically reduces size, consequently increasing energy barrier transport. Herein, we present a molecular defect strategy MOFs to introduce increase size simultaneously as quasi-solid-state (QSSEs). Compared with defect-free Li@UiO-66-based QSSE, optimized Li@UiO-66-D2-based QSSE exhibits remarkable 343% enhancement conductivity improved selectivity. Furthermore, 9 cm × 6 Li|Li@UiO-66-D2|LFP pouch cell excellent cycling performance high capacity retention. An in-depth mechanism study has unveiled significant impact of both on transport, emphasizing importance enhancing overall MOF-based QSSEs.

Language: Английский

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Low‐Concentration Electrolyte Engineering for Rechargeable Batteries

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

Published: April 21, 2025

Abstract Low‐concentration electrolytes (LCEs) present significant potential for actual applications because of their cost‐effectiveness, low viscosity, reduced side reactions, and wide‐temperature electrochemical stability. However, current electrolyte research predominantly focuses on regulation strategies conventional 1 m electrolytes, high‐concentration localized leaving design principles, optimization methods, prospects LCEs inadequately summarized. face unique challenges that cannot be addressed by the existing theories approaches applicable to three common mentioned above; thus, tailored provide development guidance are urgently needed. Herein, a systematic overview recent progress in is provided subsequent directions suggested. This review proposes core challenge high solvent ratio LCEs, which triggers unstable organic‐enriched electrolyte/electrode interface formation anion depletion near anode. On basis these issues, modification including passivation construction solvent‒anion interaction optimization, used various rechargeable battery systems. Finally, role advanced simulations cutting‐edge characterization techniques revealing LCE failure mechanisms further highlighted, offering new perspectives future practical application next‐generation batteries.

Language: Английский

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Ultra-high rate performance of single-crystalline NMC cathodes enabled by a TEP-based electrolyte

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110276 - 110276

Published: Sept. 1, 2024

Language: Английский

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