Hexamethylenetetramine additive with zincophilic head and hydrophobic tail for realizing ultra-stable Zn anode

Gu, Xiaosi; Du, Yixun; Cao, Zhiyu; Ma, Fengcan; Li, Jieyuan; Wang, Qinghong; Lai, Chao

doi:10.1016/j.cej.2023.141902

Cited by 46 publications

(6 citation statements)

References 46 publications

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“…In the pure ZnSO 4 electrolyte, the spectrum intensity encounters an obviously fast decay during Zn plating, demonstrating an uneven Zn 2+ flux which can gradually lead to increased concentration polarization near the electrode/electrolyte interface. 10,28 In contrast, the interface displays a more constant Raman signal in the l -CN/ZnSO 4 electrolyte. Such results further show that the l -CN zwitterionic additive can be easily anchored on the electrode surface to amplify the regulation function of its own polar groups on the Zn 2+ solvation structure, significantly reducing the de-solvation energy barrier and adjusting ion flux for even and fast transfer dynamics of Zn ions at the interface.…”

Section: Resultsmentioning

confidence: 99%

“…8,9 Typically, for the anodes, the additive can modulate the Zn deposition process by interface adsorption or improve the Zn ion primary solvation shell to induce uniform Zn nucleation and delay the occurrence of side reactions. 10 For the cathodes, additives can regulate the equilibrium reaction between the electrolyte and active materials or form a protective film to inhibit the cathode dissolution in the aqueous electrolyte. In addition, some additives can simultaneously alter the solvation structure of Zn 2+ and improve the stability of electrode/electrolyte interfaces, thus greatly extending the overall battery life.…”

Section: Introductionmentioning

confidence: 99%

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Reversible adsorption with oriented arrangement of a zwitterionic additive stabilizes electrodes for ultralong-life Zn-ion batteries

Chen

et al. 2023

Energy Environ. Sci.

196

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversible adsorption with oriented arrangement of a zwitterionic additive stabilizes electrodes for ultralong-life Zn-ion batteries

Chen

et al. 2023

Energy Environ. Sci.

196

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“…A higher NOP value can lead to a smaller nucleation size, promoting uniform and fine-grained deposition of Zn. [16][17]63] To evaluate the initial Zn nucleation behavior across various electrolytes, cyclic voltammetry (CV) was employed to measure NOP values. The nucleation overpotential of an electrolyte with different concentrations of peptone is shown in Figure 3a and FigureS5 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Weak‐Water‐Coordination Electrolyte to Stabilize Zinc Anode Interface for Aqueous Zinc Ion Batteries

Li,

Wang,

Chen

et al. 2023

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The performance of zinc‐ion batteries is severely hindered by the uncontrolled growth of dendrites and the severe side reactions on the zinc anode interface. To address these challenges, a weak‐water‐coordination electrolyte is realized in a peptone‐ZnSO4‐based electrolyte to simultaneously regulate the solvation structure and the interfacial environment. The peptone molecules have stronger interaction with Zn2+ ions than with water molecules, making them more prone to coordinate with Zn2+ ions and then reducing the active water in the solvated sheath. Meantime, the peptone molecules selectively adsorb on the Zn metal surface, and then are reduced to form a stable solid‐electrolyte interface layer that can facilitate uniform and dense Zn deposition to inhabit the dendritic growth. Consequently, the Zn||Zn symmetric cell can exhibit exceptional cycling performance over 3200 h at 1.0 mA cm−2/1.0 mAh cm−2 in the peptone‐ZnSO4‐based electrolyte. Moreover, when coupled with a Na2V6O16·3H2O cathode, the cell exhibits a long lifespan of 3000 cycles and maintains a high capacity retention rate of 84.3% at 5.0 A g−1. This study presents an effective approach for enabling simultaneous regulation of the solvation structure and interfacial environment to design a highly reversible Zn anode.

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“…51 In previous reports, the DOD values of Zn anodes are mostly less than 10%. 52,53 The low DOD not only conceals the true loss of Zn anodes during cycling but also adversely affects an objective assessment of the battery system. To address these issues and evaluate the effect of the dynamic adaptive interphase, we assembled hybrid cells employing 10 μm thick Zn foil (∼5.85 mAh cm −2 ) and a high-loading LMO cathode (LMO loading ∼18 mg cm −2 ) with a DOD value of ∼45.5%.…”

Section: −mentioning

confidence: 99%

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

Wang

Zhou

et al. 2023

ACS Nano

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Dendrite growth and electrode/electrolyte interface side reactions in aqueous zinc-ion batteries (AZIBs) not only impair the battery lifetime but also pose serious safety concerns for the battery system, hindering its application in large-scale energy storage systems. Herein, by introducing positively charged chlorinated graphene quantum dot (Cl-GQD) additives into the electrolyte, a bifunctional dynamic adaptive interphase is proposed to achieve Zn deposition regulation and side reaction suppression in AZIBs. During the charging process, the positively charged Cl-GQDs are adsorbed onto the Zn surface, acting as an electrostatic shield layer that facilitates smooth Zn deposition. In addition, the relative hydrophobic properties of chlorinated groups also build a hydrophobic protective interface for the Zn anode, mitigating the corrosion of the Zn anode by water molecules. More importantly, the Cl-GQDs are not consumed throughout the cell operation and exhibit a dynamic reconfiguration behavior, which ensures the stability and sustainability of this dynamic adaptive interphase. Consequently, the cells mediated by the dynamic adaptive interphase enable dendrite-free Zn plating/stripping for more than 2000 h. Particularly, even at 45.5% depth of discharge, the modified Zn//LiMn 2 O 4 hybrid cells still retain 86% capacity retention after 100 cycles, confirming the feasibility of this simple approach for application with limited Zn sources.

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Hexamethylenetetramine additive with zincophilic head and hydrophobic tail for realizing ultra-stable Zn anode

Cited by 46 publications

References 46 publications

Reversible adsorption with oriented arrangement of a zwitterionic additive stabilizes electrodes for ultralong-life Zn-ion batteries

Reversible adsorption with oriented arrangement of a zwitterionic additive stabilizes electrodes for ultralong-life Zn-ion batteries

Weak‐Water‐Coordination Electrolyte to Stabilize Zinc Anode Interface for Aqueous Zinc Ion Batteries

Bifunctional Dynamic Adaptive Interphase Reconfiguration for Zinc Deposition Modulation and Side Reaction Suppression in Aqueous Zinc Ion Batteries

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