Fatty acid methyl ester ethoxylate additive for enhancing high-temperature aqueous zinc-ion battery performance

The Journal of Chemical Physics, Journal Year: 2025, Volume and Issue: 162(13)

Published: April 1, 2025

Aqueous zinc-ion batteries (AZIBs) have attracted significant attention due to their high theoretical capacity, low cost, and excellent safety. Nevertheless, practical applications are hindered by challenges such as electrolyte decomposition, Zn corrosion/passivation, dendrite growth, which become more severe under high-temperature conditions. To address these issues, innovative design has a key strategy. In this study, we propose simple effective modification strategy introducing fatty acid methyl ester ethoxylate (FMEE) an additive. FMEE functions both solvation structure regulator water cluster stabilizer, effectively suppressing side reactions promoting the formation of robust solid interphase enriched with ZnS ZnF2. This significantly improves interfacial chemical stability anode. As result, anode achieves extended cycling lifespan up 3000 h at 1 mA cm−2 mAh cm−2. Furthermore, Zn–V2O5 full cell using FMEE-modified exhibits rate performance long-term stability. Notably, maintains superior electrochemical even 60 °C, demonstrating remarkable thermal study offers new for developing high-performance, temperature-tolerant AZIBs.

Language: Английский

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Electrical Double Layer and In Situ Polymerization SEI Enables High Reversible Zinc Metal Anode

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Aqueous zinc‐ion batteries (AZIBs) stand out among new energy storage devices due to their excellent safety and environmental friendliness. However, the formation of dendrites side reactions on zinc metal anode during cycling have become major obstacles commercialization. This study innovatively selected Sodium 4‐vinylbenzenesulfonate (VBS) as a multifunctional electrolyte additive address issues. The dissociated VBS‐ anions can not only significantly alter hydrogen bond network structure H 2 O in electrolyte, but also preferentially adsorb surface before molecules, which will result development organic anion‐rich interface alterations electrical double layer (EDL) structure. Furthermore, ─C═C─ VBS leads an situ polymerized anion solid (SEI) that adheres anode. mechanisms work together improve performance Zn//Zn symmetric batteries, achieving cycle life over 1800 h at 1 mA cm −2 mAh . introduction enhances capacity Zn//δ‐MnO full cells. provides low‐cost solution for AZIBs.

Language: Английский

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Synergistic Effect Enables Aqueous Zinc‐Ion Batteries to Operate at High Temperatures

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract The performance of aqueous zinc‐ion batteries (AZIBs) at high temperatures (HT) is severely compromised by active water corrosion, parasitic reactions, and dendrite growth. Herein, zinc trifluoroacetate introduced a low concentration (0.2 m ), dissolved in triethyl phosphate (TEP)and H 2 O. suppressed due to the reconstructed original hydrogen bond network, which helps inhibit reactions severe corrosion. Meanwhile, solid electrolyte interphase (SEI) formed on anode decomposition salt. high‐tolerance SEI physically separates anode, reducing corrosion caused water. Moreover, TEP, as prevalent fire‐retardant cosolvent, can preferentially anchor sheet, serving shielding buffer layer. TEP not only reconstructing structure electric double layer (EDL), decreasing content water, but also accelerating prompt formation further. As proof this synergistic effect, assembled symmetric Zn.

Language: Английский

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Efficient and Effective Synthesis of CaV₆O₁₆·2.7H₂O as High‐Performance Cathode Material for Aqueous Zinc Metal Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Abstract Vanadium oxide‐based materials are considered to be among the most promising positive electrode candidates for aqueous zinc‐metal batteries (AZMBs). However, complex processes, high costs, and insufficient yields of their preparation methods limit further application. Herein, an efficient effective oil bath method is presented CaV 6 O 16 ·2.7H 2 (CaVO), offering performance as cathode material AZMBs. With commercial crystalline V 5 , Ca(CH 3 COO) water raw materials, phase‐pure CaVO with 42.8 g per batch a yield 98.8% can obtained through reaction at 90 °C h. It demonstrated that pre‐intercalated Ca 2+ H not only expand interlayer spacing from 4.38 Å 8.21 but also stabilize structure vanadium oxides, promoting reversibility toward de‐/intercalation Zn /H + . In addition, density‐functional theory calculations show introduction effectively improves diffusion kinetics in CaVO. As result, provides specific capacity (379 mAh −1 0.05 A ) long‐term cyclability (94.4% retention after 2200 cycles 1 ), demonstrating synthesis high‐performance

Language: Английский

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An Mn-Enriched Interfacial Layer for Reversible Aqueous Mn Metal Batteries

Nano Letters, Journal Year: 2024, Volume and Issue: 24(44), P. 14034 - 14041

Published: Oct. 22, 2024

Aqueous manganese metal batteries have emerged as promising candidates for stationary storage due to their natural abundance, safety, and high energy density. However, the chemical reactivity sluggish migration kinetics of Mn anode induce a severe hydrogen evolution reaction (HER) dendrite formation, respectively. The situation deteriorates in low-concentration electrolyte especially. Here, we propose novel approach construct an Mn-enriched interfacial layer (Mn@MIL) on surface address these challenges simultaneously. Mn@MIL acts physical barrier not only suppress HER but also accelerate Mn2+ diffusion through saturated inhibit growth. Therefore, (1 M MnCl2), Mn||Mn symmetric cells Mn||V2O5 full with mass loading demonstrate cycling stability minimal polarization parasitic reactions, making them more suitable practical applications smart grid.

Language: Английский

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Dynamic interfacial pH regulation with chitosan gel electrolyte for enhanced high-temperature Zn anode stability

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 628, P. 235887 - 235887

Published: Nov. 29, 2024

Language: Английский

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