Electrolyte Modification for Long‐Life Zn Ion Batteries: Achieved by Methanol Additive

Lin, Xian‐Sen; Wang, Zirui; Ge, Lin‐Heng; Xu, Junwei; Ma, Wenqing; Ren, Manman; Liu, W.L.; Yao, Jinshui; Zhang, Chang‐Bin

doi:10.1002/celc.202101724

Cited by 22 publications

(7 citation statements)

References 55 publications

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“…Both alcohol and tetraalkylammonium additives are used as additives to zinc-based batteries and provide significantly elongated cycling times due to staying inert and promoting homogeneous Zn electroplating. 48,49 Therefore, the TMA-EtOH is not suspected to decompose in the presence of zinc and, thus, to be consumed at the zinc-half cell. Subsequently, the solubilizing unit accumulates in the anolyte until the TMA-EtOH cross-over between both half-cells occurs equally fast in both directions and, thus, reaches a dynamic equilibrium.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of in situ thermal stability assessment for flow batteries and deeper investigation of the ferrocene co-polymer

Volodin,

Wulf,

Tzschoeckell

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Evaluation of in situ thermal stability assessment for flow batteries and deeper investigation of the ferrocene co-polymer

Volodin,

Wulf,

Tzschoeckell

et al. 2024

J. Mater. Chem. A

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“…The excellent cycle life and remarkable multiplicative performance can be attributed to the inhibition of HER reaction, the suppression of dendrite growth, and the generation of byproducts, thus maintaining the stability of the Zn-anode interface. The corresponding exchange current density can be calculated by eq , i = i 0 F RT η 2 where i , i 0 , η, T , F , and R denote the current density, exchange current density, total overpotential, temperature, Faraday constant, and gas constant, respectively.…”

Section: Resultsmentioning

confidence: 99%

Regulating the Water Molecule Hydrogen-Bond Network to Realize Dendritic-free Zn Anodes for Zn-Ion Energy Storage Devices

Yuan,

Jiang,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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Zn metal is considered as a promising anode material within the “postlithium era” owing to its high safety and low cost. However, the development of Zn anodes is hampered by Zn dendrite problems and side reactions. Herein, xylitol is adopted as an electrolyte additive in pure ZnSO4 electrolyte to improve the reversibility and cyclic stability of the Zn anode. Benefiting from being rich in hydroxyl, the xylitol additive can break down the hydrogen-bond (H-bond) network of water molecules by forming an H-bond with water, which effectively reduces water activity and weakens the Zn2+ solvation structure. As a result, the generation of hydrogen evolution reaction (HER) and a series of parasitic reactions is depressed, and the Zn2+ nucleation sites increase significantly, resulting in the formation of a dense and homogeneous Zn deposition layer. Therefore, the Zn//Zn symmetric cell can cycle steadily for 1000 h at 4 mA cm–2 and 1 mAh cm–2 in the ZnSO4/xylitol electrolyte, which is much superior to in pure ZnSO4 electrolyte. Particularly, when xylitol/ZnSO4 electrolyte is applied in a Zn//reduced graphene oxide hybrid supercapacitor and a Zn//I2 battery, the cycling and rate performance of both devices are significantly improved. This work provides a strategy to inhibit Zn dendrites’ growth and achieve a long-life Zn anode.

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“…The original balance among water clusters in the system was significantly destroyed by the newly formed water-alcohols clusters, conducive to lowering the freezing point of the hybrid solvent. [92][93][94] As a representative example, MeOH has a strong dissolution capability with the minimum molecular size and the highest dielectric constant among all the alcohols. When MeOH was used as anti-freezing addition for the 2 m ZnSO 4 electrolyte, the homogeneous deposition of Zn can be achieved under −20 °C, because partial water molecules in the primary solvation shell of cations were substituted by MeOH and the released water molecules can further coordinate with MeOH to inhibit their agglomeration under H-bonds interactions.…”

Section: Solvent Optimizationmentioning

confidence: 99%

Design Strategies and Recent Advancements for Low‐Temperature Aqueous Rechargeable Energy Storage

Sun

Liu

et al. 2023

Advanced Energy Materials

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Therefore, it is increasingly urgent to develop novel unfrozen aqueous electrolytes to balance electrochemical performance and demand under lowtemperature. Hence, we comprehensively discuss the anti-freezing mechanisms and the composition of low-temperature electrolytes, as well as summarizing recently related reports in a timeline of milestones in the development process of low-temperature ARES (Figure 1a). Inspired by those reported works, how to modulate and optimize the component of aqueous electrolytes to remain unfrozen under ultralow temperature with ideal ionic conductivity is of particular importance to enlarge their application scope.As the ionic transport mediums, electrolytes play a crucial role in ionic migration between cathode and anode electrodes during the electrochemical processes, which are generally composed of appropriate salts and solvents. [12,13] Compared with most frequently-used organic solvents, the high solidification point (0 °C, 1 atm) of pure water as the main solvent for aqueous electrolytes primarily leads to inferior ion transfer under low temperature, restricting the broad application of ARES. [11,14] Thus, understanding the root cause of the abnormal freezing point for water among chalcogen hydrides is an essential precondition to develop lowtemperature aqueous electrolytes. The most apparent difference in various pure chalcogen hydrides is the unique existence of hydrogen bonds (H-bonds) in the pure water system. [15,16] H-bond is the essence of the coordinate bond between lonepair electrons in the strongly electronegativity N, O, or F atoms and hydrogen atom with partial positive charge rather than the shared electron pair effect (Figure 1b). From the chemical composition, the polar water molecules containing two atoms of hydrogen and one atom of oxygen in per chemical formula are H-bonds acceptors and donors at the same time, because the oxygen side with two lone-pair electrons has negative charge and the hydrogen side has positive charge, which provide the condition for H-bonds formation. Subsequently, the viscosity of liquid water increases and H-bonds restrict the vibration of water molecules, boosting the formation of longrange ordered crystalline structure under subzero temperature. Theoretically, one water molecule can effectively interact with up to four nearest neighbor water molecules by H-bonds interaction to generate the self-associated water clusters, which has the short-range ordering in the form of tetrahedral H-bonds within the water clusters due to the sp 3 hybridization of O Aqueous rechargeable energy storage (ARES) has received tremendous attention in recent years due to its intrinsic merits of low cost, high safety, and environmental friendliness. However, the relatively higher freezing point of conventional aqueous electrolytes results in sluggish kinetics and inferior ion transport efficiency under low temperature, severely restricting their further development and practical applications. In order to deal with the existing issues, the design principles ...

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Electrolyte Modification for Long‐Life Zn Ion Batteries: Achieved by Methanol Additive

Cited by 22 publications

References 55 publications

Evaluation of in situ thermal stability assessment for flow batteries and deeper investigation of the ferrocene co-polymer

Evaluation of in situ thermal stability assessment for flow batteries and deeper investigation of the ferrocene co-polymer

Regulating the Water Molecule Hydrogen-Bond Network to Realize Dendritic-free Zn Anodes for Zn-Ion Energy Storage Devices

Design Strategies and Recent Advancements for Low‐Temperature Aqueous Rechargeable Energy Storage

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