Hexaoxacyclooctadecane induced interfacial engineering to achieve dendrite-free Zn ion batteries

Li, Rui; Li, Mengchao; Yu, Chao; Guo, Jianqiang; Xu, Guiyin; Li, Borong; Liu, Zheyuan; Yang, Chengkai; Yanyu,

doi:10.1016/j.ensm.2021.11.015

Cited by 75 publications

(40 citation statements)

References 28 publications

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“…Under the competition of H + buffering/Mn 2+ complexing and ion diffusion/desolvation caused by steric hindrance of groups on carboxyl, the multiple factors induced comprehensive effect makes reaction thermodynamics and kinetics stand vividly. [42] As expected, the electrolyte containing propionic ions provides the highest specific charge capacity of 513.1 mA h g −1 at 0.5 A g −1 for the first cycles (inset in Figure 6a), while it also suffers the most serious capacity decay, maintaining a poor capacity retention of ≈45% after 300 cycles (Figure 6a). The Coulombic efficiencies remain nearly 100% during the whole cycles (Figure S19, Supporting Information), which indicates that the capacity decay is not attributed to irreversible manganese dissolution/deposition but the polarization, and the lower energy efficiency also reflects the high energy barrier (Figure S20, Supporting Information).…”

Section: Resultssupporting

confidence: 69%

Balanced Interfacial Ion Concentration and Migration Steric Hindrance Promoting High‐Efficiency Deposition/Dissolution Battery Chemistry

Liu

Qin

et al. 2022

Advanced Materials

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The solid–liquid transition reaction lays the foundation of electrochemical energy storage systems with high capacity, but realizing high efficiency remains a challenge. Herein, in terms of thermodynamics and dynamics, this work demonstrates the significant role of both interfacial H+ concentration and Mn2+ migration steric hindrance for the high‐efficiency deposition/dissolution chemistry of zinc–manganese batteries. Specially, the introduction of formate anions can buffer the generated interfacial H+ to stabilize interfacial potential according to the Nernst equation, which stimulates high capacity. Compared with acetate and propionate anions, the formate anion also provides high adsorption density on the cathode surface to shield the electrostatic repulsion due to the small spatial hindrance. Particularly for the solvated Mn2+, the formate‐anion‐induced lower energy barrier of the rate‐determining step during the step‐by‐step desolvation process results in lower polarization and higher electrochemical reversibility. In situ tests and theoretical calculations verify that the electrolyte with formate anions achieve a good balance between ion concentration and ion‐migration steric hindrance. It exhibits both the high energy density of 531.26 W h kg‐1 and long cycle life of more than 300 cycles without obvious decay.

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Section: Resultssupporting

confidence: 69%

Balanced Interfacial Ion Concentration and Migration Steric Hindrance Promoting High‐Efficiency Deposition/Dissolution Battery Chemistry

Liu

Qin

et al. 2022

Advanced Materials

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“…and organic materials especially for the covalent organic frameworks (COFs). [ 13 ] Excepting that, the effectiveness of introducing additive into aqueous electrolyte system also has been widely investigated, including the organic molecules [ 14–16 ] and inorganic salts. [ 17,18 ] Generally, electrolyte additive engineering can be expected to optimize the solvation structure and lowering the nucleation barrier.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, much research attention has been devoted to aqueous zinc-ion batteries (AZIBs), not only because the intrinsic safety, but also the high theoretical capacity and low redox potential of Zn metal anodes. These advantages offered the AZIBs great molecules [14][15][16] and inorganic salts. [17,18] Generally, electrolyte additive engineering can be expected to optimize the solvation structure and lowering the nucleation barrier.…”

Section: Introductionmentioning

confidence: 99%

Novel Concept of Separator Design: Efficient Ions Transport Modulator Enabled by Dual‐Interface Engineering Toward Ultra‐Stable Zn Metal Anodes

Liang

Zhao

et al. 2022

Adv Funct Materials

106

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Sluggish transport kinetics and rapid dendrite growth are considered the main obstacles that impair the performance of Zn metal batteries. This work has developed a unique strategy of dual‐interface engineering (DIE) to design the separator as efficient ions transport modulator. The dual function of spontaneous polarization effect and high zincophilicity of BaTiO3 (BTO) is revealed by combining the theoretical and experimental studies. Benefiting from the decoration of BTO on glass fiber and well filling of the surface interspace, the DIE‐modified separator can not only effectively capture and accelerate Zn2+ transport between the fiber–electrolyte interface, but also redistribute the ions transport into homogenization in the separator–anode interface. Therefore, the modified Zn anodes perform highly reversible Zn plating/stripping with ultrahigh cumulative capacity even up to 9500 mAh cm−2 at the high current density of 10 mA cm−2. Meanwhile, the modified Zn‐MnO2 battery can retain a specific capacity of 108 mAh g−1 after 1800 cycles at 1 A g−1. Furthermore, the capacity retention of the battery also can be improved from 37.5% up to 115% at 0.2 A g−1 after 100 cycles. Such a novel concept for separator engineering provides a new perspective to enable ultra‐stable Zn metal anodes and high‐performance Zn metal batteries.

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“…34 Among them, manipulating the electrolyte with zincophilic organic additives represents an effective and economical strategy for stabilizing Zn anodes towards practical applications. 11,35 Theoretically, these zincophilic additives could not only adjust the solvation structure to decrease the water reactivity, [36][37][38] but also preferentially adsorb on the Zn surface to inhibit water adsorption and regulate random Zn 2+ diffusion, thus smoothing the Zn deposits. [38][39][40] For these reasons, various zincophilic organic additives have been rationally designed and they improve the reversibility of Zn plating/stripping, but their effectiveness at high current density and areal capacity is still limited.…”

Section: Introductionmentioning

confidence: 99%

Super-zincophilic additive induced interphase modulation enables long-life Zn anodes at high current density and areal capacity

et al. 2022

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Hexaoxacyclooctadecane induced interfacial engineering to achieve dendrite-free Zn ion batteries

Cited by 75 publications

References 28 publications

Balanced Interfacial Ion Concentration and Migration Steric Hindrance Promoting High‐Efficiency Deposition/Dissolution Battery Chemistry

Balanced Interfacial Ion Concentration and Migration Steric Hindrance Promoting High‐Efficiency Deposition/Dissolution Battery Chemistry

Novel Concept of Separator Design: Efficient Ions Transport Modulator Enabled by Dual‐Interface Engineering Toward Ultra‐Stable Zn Metal Anodes

Super-zincophilic additive induced interphase modulation enables long-life Zn anodes at high current density and areal capacity

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