Progress in optimizing the application strategy of SEI membranes for HC sodium ion batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 104, P. 114443 - 114443

Published: Nov. 6, 2024

Language: Английский

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Trace NaBF₄ Modulated Ultralow‐Concentration Ether Electrolyte for Durable High‐Voltage Sodium‐Ion Batteries

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

Published: Jan. 13, 2025

Abstract Ultralow‐concentration ether electrolytes hold great promise for cost‐effective sodium‐ion batteries (SIBs), while their inferior cycle stability under high voltages remains an awkward challenge. Herein, ultralow‐concentration diglyme (G2)‐based with single sodium salt are found to manifest high‐rate capability when employed high‐voltage Na 3 (VOPO 4 ) 2 F (NVOPF) cathode, but specific capacity rapidly depletes exhaustion during long‐term cycling. To address this issue, trace NaBF (0.03 m as electrolyte additive is introduced, which minimally affects ion conductivity of the pristine electrolyte, yet weakens coordination between + ions and G2 molecules. This allows more PF 6 − enter solvation sheath ions, forming a stable cathode interphase enhancing performance without sacrificing (up 20 C). As result, modulated G2‐based enables NVOPF steadily, retention 94.2% over 1000 cycles at low rate 1 C. work provides valuable insights into modulation use in durable SIBs.

Language: Английский

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Transformative Effect of Li Salt for Proactively Mitigating Interfacial Side Reactions in Sodium-Ion Batteries

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 21, 2025

Abstract The robust respective formations of a solid electrolyte interphase (SEI) and pillar at the surfaces hard carbon O3-type positive electrodes are consequences integrating LiPF 6 salt into sodium-ion battery that considerably strengthens both interfaces negative electrodes. improvement cycle performances due to formation highly passivating SEI on electrode is induced by alternated solvation structure following addition Li salt, which inhibits electron leakage from further decomposition. with incorporated less soluble than Na-based SEI, passivation ability initially formed can thus be well preserved. Conversely, gas evolution caused oxygen release reduced marginal surface intercalation ions O3-positive electrode. Additionally, LiF layer forms O3 diminishes additional deterioration after formation. Compared fluoroethylene carbonate additive typically applied, simultaneously strengthened interface yields major improvements in capacity retention.

Language: Английский

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Research Progress of Electrolytes and Electrodes for Lithium‐ and Sodium‐Ion Batteries at Extreme Temperatures

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Abstract Lithium‐ion batteries (LIBs) and sodium‐ion (SIBs) have recently received considerable attention in electrical energy storage (EES) systems due to their sustainability, high density, superior conversion efficiency. However, with the expansion of application scenarios, ability operate under extreme conditions, especially low temperatures, is becoming increasingly important. Therefore, extending operating temperature electrochemically stable safe LIBs SIBs has become a critical research topic. In this review, failure mechanism conditions at same time problems faced by electrolyte electrode materials are discussed, various targeted optimization strategies proposed. Additionally, performance such environments compared, drawing an instructive understanding. Finally, summary perspective presented for improving battery electrochemical respectively. Overall, review aims provide design guidelines future conditions.

Language: Английский

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Designing Aggregates-Dominated Electrolyte via Tuning Cation-Solvent Interaction for High-Safe and Long-Life Sodium-Ion Batteries

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104297 - 104297

Published: April 1, 2025

Language: Английский

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Constructing Dissolution–Resistant Interphases for Long‐Life Sodium‐Ion Batteries at Elevated Temperatures

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

Published: May 8, 2025

Abstract Rechargeable sodium‐ion batteries (SIBs) utilizing NaPF 6 ‐carbonate electrolytes consistently exhibit unsatisfactory cycle life at elevated temperatures, posing a significant challenge for their large‐scale commercialization. This is mainly caused by the instability of interphase layers especially high solubility components (especially NaF) in carbonate solvents. In this study, novel additive sodium difluorobis(oxalato) phosphate (NaDFBOP) synthesized and introduced into to enhance commercial SIBs composed NaNi 1/3 Fe Mn O 2 (NFM) cathode hard carbon (HC) anode, particularly 50 °C. Specifically, NaDFBOP enables NFM/HC retain 85.45% initial capacity after 1000 cycles 30 °C 90.76% 500 Theoretical calculations reveal that DFBOP⁻ anions enter first solvation shell Na + , exhibits strong propensity decomposition. Characterizations suggest favors formation dissolution–resistant robust enriched dissolution‐resistant oxalate‐containing species inorganic NaF, which have mutual binding energy. work underscores critical importance designing functional additives constructing interphases temperature SIBs.

Language: Английский

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Preparation of mesoporous hard carbon anode materials by nitrogen doping of biomass to enhance the specific capacity of sodium ion adsorption

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119190 - 119190

Published: May 1, 2025

Language: Английский

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