Heterogeneous Doping via Methyl‐Encapsulated Fumed Silica Enabling Weak Solvated and Self‐Purified Electrolyte in Long‐Term High‐Voltage Lithium Batteries

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

Published: Jan. 17, 2025

Abstract Crafting a sustainable non‐aqueous electrolyte is paramount in the pursuit of high‐voltage lithium batteries that exhibit exceptional performance. Traditional carbonate‐based electrolytes encounter hurdles maintaining electrochemical stability due to unstable interphases, as well continuous degradation itself. Herein, based on heterogeneous doping, colloidal with multiple functions via simple integrating methyl‐encapsulated fumed silica (MFS) into conventional effectively addresses aforementioned challenges. The produced endowed unexpected self‐purification capabilities eliminates HF and H 2 O, consequently enhancing electrolyte, interphase, electrode. Furthermore, MFS induces weakly solvated Li + structure heterogeneously doped original solvation matrix contributes formation tailored stable electrode/electrolyte interphases for both anode cathode. Using such Li||LiCoO demonstrate capacity retentions 83.6% 95.4% within 3000 1000 cycles at charging voltages 4.4 4.5 V, respectively. Remarkably, addition 2000 ppm O this cells can be cycled stably over 400 retention 88.6%. This effective engineering strategy has sustainability significantly advance development highly batteries.

Language: Английский

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Electrolyte engineering and interphase chemistry toward high-performance nickel-rich cathodes: Progress and perspectives

Materials Reports Energy, Journal Year: 2025, Volume and Issue: unknown, P. 100317 - 100317

Published: Jan. 1, 2025

Language: Английский

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Highly Adaptable Electrode–Electrolyte Interphases Constructed by Dual‐Additive‐Optimized Electrolyte for 4.5 V Lithium Metal Batteries

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

Published: March 3, 2025

Abstract Lithium metal batteries (LMBs) with Li anodes and high‐voltage LiCoO 2 (LCO) cathodes offer high energy density but face challenges such as dendrite growth LCO structure degradation, which primarily arises from the electrolyte's inability to form a stable interphase. Herein, dual‐additive optimized carbonate‐based electrolyte is developed, incorporating tetraethylammonium nitrate (TEANO 3 ) lithium difluorobis(oxalato) phosphate (LiDFBOP) regulators. LiDFBOP enhances interfacial stability compactness, while TEANO facilitates + transport suppresses excessive decomposition of LiDFBOP. The synergistic effect establishes robust, ion‐conductive solid interphase (SEI) cathode–electrolyte (CEI) enriched P‐ N‐containing inorganic compounds (including LiN x O y P‐O/P‐F species), enabling dense deposition cycling under cut‐off voltage 4.5 V. enables Li||LCO full cells capacity retention 84% even high‐mass‐loading cathode (3.5 mAh cm −2 limited (N/P = 2). This work demonstrates straightforward design strategy for optimizing SEI CEI, advancing practical deployment LMBs.

Language: Английский

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Tuning Surface Reconfiguration for Durable Cathode/Electrolyte Interphase of LiCoO₂ at 45 °C

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(46)

Published: Aug. 24, 2024

Abstract Recently, strategies of optimizing cathode/electrolyte interphase (CEI) have been applied to enhance the durability LiCoO 2 (LCO) at high voltages (≥4.55 V vs Li/Li + ) and temperatures (≥45 °C), but underlying mechanism is still in debate. Herein, a durable CEI on LCO that operates 45 °C achieved via tuning chemical morphological properties surface. Specifically, an artificial layer composing island‐shaped AlPO 4 /Li 3 PO deposits constructed surface, i.e., AP‐LCO. Upon cycle, progressive evolution from Li AlF 6 takes place, robust enriching with ion‐conductive species formed, leading uniform compact provide comprehensive coverage Therefore, AP‐LCO displays outstanding improvements resistance HF corrosion, suppression surface degradation, kinetics transport, along unprecedentedly thermal stability. Benefited above advantages, Li||AP‐LCO cell shows capacity retention 84.0% 500 cycles 4.6 V. This work provides new insight into role for high‐temperature cathodes.

Language: Английский

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Additive engineering enables aggressive high-voltage LiCoO2 lithium-ion batteries

Joule, Journal Year: 2025, Volume and Issue: unknown, P. 101846 - 101846

Published: Feb. 1, 2025

Language: Английский

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A “three-in-one” strategy via La2O3-ZrO2 coating to effectively enhance the electrochemical performance of LiCoO2

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 989, P. 174377 - 174377

Published: April 2, 2024

Language: Английский

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Superior stable high‐voltage LiCoO₂ enabled by modification with a layer of lithiated polyvinylidene fluoride‐derived LiF

Carbon Energy, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

Abstract High‐voltage LiCoO 2 (LCO) can deliver a high capacity and therefore significantly boost the energy density of Li‐ion batteries (LIBs). However, its cyclability is still major problem in terms commercial applications. Herein, we propose simple but effective method to greatly improve high‐voltage an LCO cathode by constructing surface LiF modification layer via pyrolysis lithiated polyvinylidene fluoride (Li‐PVDF) coating under air atmosphere. Benefitting from good film‐forming strong adhesion ability Li‐PVDF, thus‐obtained uniform, dense, conformal; therefore, it capable acting as barrier effectively protect direct exposure electrolyte, thus suppressing interfacial side reactions structure deterioration. Consequently, stability electrode enhanced. Under charge cutoff voltage 4.6 V, LiF‐modified (LiF@LCO) demonstrates 201 mA h g −1 at 0.1 C stable cycling performance 0.5 with 80.5% retention after 700 cycles, outperforming vast majority cathodes reported so far.

Language: Английский

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Recent developments in coating investigation of LiNixMnyCo1-x-yO2 cathode material with promising (Li, Ni) rich layered for future generation lithium-ion batteries

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1004, P. 175710 - 175710

Published: July 25, 2024

Language: Английский

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Synergistic optimization of a compound electrolyte additive for the solid electrolyte interface in lithium metal batteries

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 630, P. 236100 - 236100

Published: Dec. 24, 2024

Language: Английский

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H-Transfer Mediated Self-Enhanced Interphase for High-Voltage Lithium-Ion Batteries

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(7), P. 3578 - 3586

Published: July 1, 2024

The dehydrogenation of solvents presents a significant challenge at the cathode–electrolyte interface (CEI) in high-voltage lithium-ion batteries (LIBs), resulting generation corrosive HF and posing detrimental effects on sustainability LIBs. Herein, we propose an interfacial self-enhanced strategy mediated by H-transfer to mitigate solvent CEI. As proof concept, trimethyl phosphate (TMP) was coupled with 1,1,2,2,3,3,4-heptafluorocyclopentane (HFCP) prepare electrolyte, where TMP serves capture H free radicals produced HFCP, while dehydrogenated-HFCP would situ passivate cathode/electrolyte interface. TMP/HFCP electrolyte enables 4.4 V graphite||LiNi0.8Co0.1Mn0.1O2 LIB achieve over 90% capacity retention after 1300 cycles 0.5 C. Furthermore, exhibits favorable properties terms nonflammability minimal gas production during electrochemical thermal tests. This work promising pathway for realizing high-safety

Language: Английский

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