Inhibition of zinc dendrites by dopamine modified hexagonal boron nitride electrolyte additive for zinc-ion batteries

Su, Kailimai; Chen, Jing; Zhang, Xu; Feng, Jianze; Xu, Yongtai; Pu, Yunxun; Wang, Chengshuai; Ma, Peipei; Wang, Yan; Lang, Junwei

doi:10.1016/j.jpowsour.2022.232074

Cited by 24 publications

(11 citation statements)

References 55 publications

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“…The increased current density and reduced voltage gap in the CV curve of the CoSA/C‐containing cell indicate that the CoSA/C additive accelerates electrochemical kinetics (Figure S29, Supporting Information). [ 4,40 ] Further evidence is given by the Nyquist plots with an R ct of 298 Ω in the cell using ZAO‐CoSA/C electrolyte, much lower than that in the cell using the ZSO electrolyte (467 Ω, Figure S31, Supporting Information). The CoSA/C‐containing cell delivers much higher rate capability compared to the cell using the ZSO electrolyte as the current density increasing from 0.2 to 8 A g −1 (Figure 5b).…”

Section: Resultsmentioning

confidence: 98%

Atomic Zincophilic Sites Regulating Microspace Electric Fields for Dendrite‐Free Zinc Anode

Fan,

Li,

Shi

et al. 2023

Advanced Materials

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Aqueous Zn metal batteries are promising candidates for large‐scale energy storage due to their intrinsic advantages. However, Zn tends to deposit irregularly and forms dendrites driven by the uneven space electric field distribution near the Zn‐electrolyte interphase. Herein we demonstrate that trace addition of Co single atom anchored carbon (denoted as CoSA/C) in the electrolyte regulates the microspace electric field at the Zn‐electrolyte interphase and unifies Zn deposition. Through preferential adsorption of CoSA/C on the Zn surface, the atomically dispersed Co‐N3 with strong charge polarization effect can redistribute the local space electric field and regulate ion flux. Moreover, the dynamic adsorption/desorption of CoSA/C upon plating/stripping offers sustainable long‐term regulation. Therefore, Zn||Zn symmetric cells with CoSA/C electrolyte additive deliver stable cycling up to 1600 h (corresponding to a cumulative plated capacity of 8 Ah cm−2) at a high current density of 10 mA cm−2, demonstrating the sustainable feature of microspace electric fields regulation at high current density and capacity.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 98%

Atomic Zincophilic Sites Regulating Microspace Electric Fields for Dendrite‐Free Zinc Anode

Fan,

Li,

Shi

et al. 2023

Advanced Materials

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“…According to the computed HOMO energy, the electrolyte containing 5% DMMP and 0.1% wt DOP exhibited a substantially greater oxidative current density than the reference electrolyte. Nevertheless, there are no substantial changes in the reductive current densities. , It suggested that dopamine would be ineffective as an anode addition. Dopamine may have influenced the electrochemical breakdown of the electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, there are no substantial changes in the reductive current densities. 63,64 It suggested that dopamine would be ineffective as an anode addition. Dopamine may have influenced the electrochemical breakdown of the electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Exploring the Effects of Dopamine and DMMP Additives on Improving the Cycle Boosting and Nonflammability of Electrolytes in Full-Cell Lithium-Ion Batteries (18650)

et al. 2023

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Concerns over recyclability, performance, and safety have grown as the use of commercial Li-ion batteries to meet our energy needs has increased. Electrolytes may aid in increased flammability, capacity loss, and safety. Dimethyl methyl phosphonate (DMMP), a flame retardant, and dopamine hydrochloride (DOP) are utilized to increase the cycle life and graphite anode compatibility. The optimal additive formulation (5% wt DMMP and 0.1% wt DOP) reduces inflammability and increases cycle life and reversible capacity (99.14%). Molecular dynamics simulations provide a comprehensive atomistic account of the dynamics of Li + ion solvation in the electrolytes and in the presence of additives. Dopamine and DMMP increase the Li-ion solvation-free energy in the electrolyte formulation. While increasing the Li-ion conductivity, additive addition reduces the electrolyte viscosity and enables the formation of a smaller, stronger Li-DMMP-DOP complex than the larger Li-carbonate complex found in Li-neat electrolyte systems. When DMMP and DOP are added to the electrolyte, the carbonates are displaced from the Li-carbonate complex by these additives. The Li-ion solvating nature or compatibility was improved upon the addition of DMMP/DOP further aided by a faster diffusive behavior of the Li complex, which in part would be instrumental in enhancing the performance and safety of the battery electrolyte additive formulations. The modified electrolyte (DMMP 5% wt, DOP 0.1% wt) has a conductivity of 18.60 mS cm −1 and a low viscosity at 25 °C. This formulation was evaluated using graphite/NMC-532 cylindrical cells with commercial electrodes. The performance of the graphite/NMC-532 cells containing the modified electrolyte was comparable to those of regular electrolytes based on carbonates: ethylene carbonate/ dimethyl carbonate/ethylmethylcarbonate (EC/DMC/EMC) (1:1:1) additions. These findings indicate that DOP and DMMP have a lower oxidation potential (4.3 V) than most commercial electrolytes (4.5 V), preventing cathode deterioration. These insights should pave the path for rational design of practical and cost-effective Li-ion battery electrolyte additive combinations aimed toward lower flammability and improved performance.

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“…But because of being nonaqueous, they have much lower ionic conductivity and are hence less attractive. Unlike this kind of electrolyte, a hydrated eutectic electrolyte not only maintains most eutectic properties but also has a high level of ionic conductivity as a result of the addition of water [18,[130][131][132] . Water molecules in the electrolyte are mainly confined to the internal interaction network of eutectic solvents by H bonds, so this kind of electrolyte has low water freezing points, enabling it to be used in low-temperature batteries [131] .…”

Section: Solventmentioning

confidence: 99%

. Insights into the design of mildly acidic aqueous electrolytes for improved stability of Zn anode performance in zinc-ion batteries

2023

Energy Mater

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Mildly acidic aqueous zinc (Zn) batteries are promising for large-energy storage but suffer from the irreversibility of Zn metal anodes due to parasitic H 2 evolution, Zn corrosion, and dendrite growth. In recent years, increasing efforts have been devoted to overcoming these obstacles by regulating electrolyte structures. In this review, we investigate progress towards mildly acidic aqueous electrolytes for Zn batteries, with special emphasis on how the microstructures (in the bulk phase and on the surface of Zn anodes) affect the performance of Zn anodes. Moreover, effective computational simulations and characterization measurements for the structures of bulk electrolytes and Zn/electrolyte interfaces are discussed, along with perspectives for the direction of further investigations.

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Inhibition of zinc dendrites by dopamine modified hexagonal boron nitride electrolyte additive for zinc-ion batteries

Cited by 24 publications

References 55 publications

Atomic Zincophilic Sites Regulating Microspace Electric Fields for Dendrite‐Free Zinc Anode

Atomic Zincophilic Sites Regulating Microspace Electric Fields for Dendrite‐Free Zinc Anode

Exploring the Effects of Dopamine and DMMP Additives on Improving the Cycle Boosting and Nonflammability of Electrolytes in Full-Cell Lithium-Ion Batteries (18650)

. Insights into the design of mildly acidic aqueous electrolytes for improved stability of Zn anode performance in zinc-ion batteries

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