Selection criteria for electrical double layer structure regulators enabling stable Zn metal anodes

Huang, Cong; Zhao, Xin; Hao, Yisu; Yang, Yujie; Yang, Qian; Chang, Ge; Zhang, Yan; Tang, Qunli; Hu, Aiping; Chen, Xiaohua

doi:10.1039/d3ee00045a

Cited by 105 publications

(49 citation statements)

References 65 publications

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“…As displayed in Figure S4, the decrease in the EDL capacitance of the ZnSO 4 -80 Gly electrolyte manifested that the Gly ± tends to expand the thickness of the EDL on the Zn surface capable of weakening the EDL repulsion. 40,41 Moreover, Fourier transform infrared (FTIR) spectra (Figure S5) of Zn metal foil immersed in ZnSO 4 -80 Gly electrolytes show almost no distinct characteristic peak of H 2 O (3200−3400 cm −1 ) 42 and SO 4 2− (1123 cm −1 ), 43,44 but obvious characteristic peaks of the C�O stretching vibration, N−H bending vibration, and C−N stretching vibration appeared at 1643, 1519, and 1020 cm −1 . 45 Then, the X-ray diffraction (XRD) pattern and scanning electron microscopy (SEM) image (Figure S6) of the Zn foil immersed in ZnSO 4 -80 Gly electrolyte depicted the absence of the byproduct (Zn 4 SO 4 (OH) 6 •xH 2 O) diffraction peak at 8.1°a nd no hexagonal sheets or defects on the surface of the Zn metallic foil.…”

Section: Resultsmentioning

confidence: 99%

Adaptive Ionization-Induced Tunable Electric Double Layer for Practical Zn Metal Batteries over Wide pH and Temperature Ranges

Lin,

He,

Xiong

et al. 2023

ACS Nano

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The violent side reactions of Zn metal in aqueous electrolyte lead to sharp local-pH fluctuations at the interface, which accelerate Zn anode breakdown; thus, the development of an optimization strategy to accommodate a wide pH range is particularly critical for improving aqueous Zn metal batteries. Herein, we report a pH-adaptive electric double layer (EDL) tuned by glycine (Gly) additive with pH-dependent ionization, which exhibits excellent capability to stabilize Zn anodes in wide-pH aqueous electrolytes. It is discovered that a Gly-ionic EDL facilitates the directed migration of charge carriers in both mildly acidic and alkaline electrolytes, leading to the successful suppression of local saturation. It is worth mentioning that the regulation effect of the additive concentration on the inner Helmholtz plane (IHP) structure of Zn electrodes is clarified in depth. It is revealed that the Gly additives without dimerization can develop orderly and dense vertical adsorption within the IHP to effectively reduce the EDL repulsive force of Zn2+ and isolate H2O from the anode surface. Consequently, they Zn anode with tunable EDL exhibits superior electrochemical performance in a wide range of pH and temperature, involving the prodigious cycle reversibility of 7000 h at Zn symmetric cells with ZnSO4-Gly electrolytes and an extended lifespan of 50 times in Zn symmetric cells with KOH-Gly electrolytes. Moreover, acidic Zn powder||MnO2 pouch cells, and alkaline high-voltage Zn||Ni0.8Co0.1Mn0.1O2 cells, and Zn||NiCo-LDH cells also deliver excellent cycling reversibility. The tunable EDL enables the ultrahigh depth of discharge (DOD) of 93%. This work elucidates the design of electrolyte additives compatible in a wide range of pH and temperature, which might cause inspiration in the fields of practical multiapplication scenarios for Zn anodes.

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Section: Resultsmentioning

confidence: 99%

Adaptive Ionization-Induced Tunable Electric Double Layer for Practical Zn Metal Batteries over Wide pH and Temperature Ranges

Lin,

He,

Xiong

et al. 2023

ACS Nano

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“…To date, ZnSO 4 and Zn(CF 3 SO 3 ) 2 are widely utilized as electrolyte solutions in aqueous ZIBs owing to their relatively wide electrochemical windows. [232,233] As indicated in the previous introduction, other solutions like ZnCl 2 , Zn(CH 3 COO) 2 , and Zn(NO 3 ) 2 are explored actively as well. While ZnSO 4 exhibits superiority performance due to the SO 4 2− having higher stability and compatibility than other anions, which brings in faster reaction kinetics.…”

Section: Electrolyte Enhancementmentioning

confidence: 99%

High Energy Density Aqueous Zinc–Chalcogen (S, Se, Te) Batteries: Recent Progress, Challenges, and Perspective

Wang,

Liu,

et al. 2023

Advanced Energy Materials

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Zinc‐ion batteries with chalcogen‐based (S, Se, Te) cathodes have emerged as a promising candidate for utility‐scale energy storage systems and portable electronics, which have attracted rapid attention and offer tremendous opportunities owing to their excellent energy density, on top of the advantages of aqueous Zn batteries including cost‐effectiveness, inherent safety, and eco‐friendliness. Here, a comprehensive overview on the basic mechanism of zinc–chalcogen batteries with their great advantages and intrinsic issues is provided. More detailed recent progress is summarized and the existing challenges with promising strategies are provided as well. First, four specific types of batteries are presented, including: zinc–sulfur, zinc–selenium, zinc–selenium sulfide, and zinc–tellurium batteries. Second, the remaining challenges within chalcogen‐based cathodes in the material preparation, physicochemical properties, and battery performance are summarized and discussed. Meanwhile, a series of constructive strategies are comprehensively put forward for optimizing electrochemical performance. Finally, the future research perspectives of zinc–chalcogen batteries are proposed for the exploration and innovation of next‐generation green zinc storage applications.

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“…Reportedly, aromatic conjugate structures and amino groups promote the preferential adsorption of 0.5 vol % sulfolane on Zn anode interface and reduction decomposition of additive molecules facilitates the formation of stable SEI. [53] Chen et al demonstrated SEI forming capability as the most important feature for high-performance EDL regulators in trace (< 1.0 vol.%) additives (Figure 5e). Conclusively, the rational design of EDL regulators needs to be explored for improvement in anode performance.…”

Section: Organic Moleculesmentioning

confidence: 99%

Interface Regulation via Electric Double Layer for Rechargeable Batteries

Du,

Song,

Yang

et al. 2023

ChemSusChem

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Interface, especially the electrochemically formed solid electrolyte interphase (SEI), is significantly important for cycling stability, reaction kinetics and safety of rechargeable batteries. The structure and composition of the electric double layer (EDL) greatly affect the formation of SEI and the performance of electrodes. However, as far as we know, there isn’t review to demonstrate the theme specially. Herein, the recent substantial progress for EDL and its impact on the formation of SEI in rechargeable batteries are reviewed and discussed. Firstly, the specific adsorption of electrolyte components on electrodes’ surface and the ionic solvation structure is introduced. Furthermore, various methods for controlling EDL in different electrode systems are described. Finally, the future development of SEI via EDL is presented for improvements and breakthroughs in electrochemical performance of rechargeable batteries.

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Selection criteria for electrical double layer structure regulators enabling stable Zn metal anodes

Abstract: Regulating the electrical double layer (EDL) structure via electrolyte additives is a promising strategy to improve the cycle stability of Zn anodes, but there are no general disciplines that can...

Cited by 105 publications

References 65 publications

Adaptive Ionization-Induced Tunable Electric Double Layer for Practical Zn Metal Batteries over Wide pH and Temperature Ranges

Adaptive Ionization-Induced Tunable Electric Double Layer for Practical Zn Metal Batteries over Wide pH and Temperature Ranges

High Energy Density Aqueous Zinc–Chalcogen (S, Se, Te) Batteries: Recent Progress, Challenges, and Perspective

Interface Regulation via Electric Double Layer for Rechargeable Batteries

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