Eutectic electrolyte and interface engineering for redox flow batteries

Tao, Xuan; Wang, L.W.

doi:10.1016/j.ensm.2022.03.032

Cited by 12 publications

(5 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inexpensive, eco‐friendly and chemically stable properties of acetamide are all conducive to a wide range of practical applications. However, eutectic electrolytes often show poor Zn 2+ kinetics transport and low‐temperature adaptability due to its high viscosity, insufficient solvation, and ionic aggregation [17,18] …”

Section: Introductionmentioning

confidence: 99%

“…However, eutectic electrolytes often show poor Zn 2 + kinetics transport and low-temperature adaptability due to its high viscosity, insufficient solvation, and ionic aggregation. [17,18] The viscosity of electrolytes can typically be decreased by adjusting the temperature and adding a cosolvent. Unfortunately, simply increasing the temperature may induce the adverse effect of volatilizing the electrolyte, which is not conducive to the realization of high performance zinc ion batteries.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast Reaction Kinetics and Commendable Low‐Temperature Adaptability of Zinc Batteries Enabled by Aprotic Water‐Acetamide Symbiotic Solvation Sheath

Wang,

Chen,

Ying

et al. 2024

Angew Chem Int Ed

View full text Add to dashboard Cite

Although rechargeable aqueous zinc batteries are cost effectiveness, intrinsic safety, and high activity, they are also known for bringing rampant hydrogen evolution reaction and corrosion. While eutectic electrolytes can effectively eliminate these issues, its high viscosity severely reduces the mobility of Zn2+ ions and exhibits poor temperature adaptability. Here, we infuse acetamide molecules with Lewis base and hydrogen bond donors into a solvated shell of Zn[(H2O)6]2+ to create Zn(H2O)3(ace)(BF4)2.The viscosity of 1ace‐1H2O is 0.032 Pa s, significantly lower than that of 1ace‐0H2O (995.6 Pa s), which improves ionic conductivity (9.56 mS cm‐1) and shows lower freezing point of ‐45 , as opposed to 1ace‐0H2O of 4.04 mS cm‐1 and 12 , respectively. The acidity of 1ace‐1H2O is ~2.8, higher than 0ace‐1H2O at ~0.76, making side reactions less likely. Furthermore, benefiting from the ZnCO3/ZnF2‐rich organic/inorganic solid electrolyte interface, the Zn||Zn cells cycle more than 1300 hours at 1 mA cm‐2, and the Zn||Cu operate over 1800 cycles with an average Coulomb efficiency of ~99.8%. The Zn||PANI cell cycles over 8500 cycles, with a specific capacity of 99.8 mAh g‐1 at 5 A g‐1 at room temperature, and operated at ‐40 with a capacity of 66.8 mAh g‐1.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast Reaction Kinetics and Commendable Low‐Temperature Adaptability of Zinc Batteries Enabled by Aprotic Water‐Acetamide Symbiotic Solvation Sheath

Wang,

Chen,

Ying

et al. 2024

Angew Chem Int Ed

View full text Add to dashboard Cite

show abstract

“…Figure comprehensively illustrates the “arched-window” structured design for constructing novel eutectic electrolytes, where extensive attention is paid to the relationship among anion categories and Lewis base choice, eutectic thermodynamic and model construction, eutectic electrolyte–interphase chemistry, and liquid preservation ability at low temperatures. This figure provides a favorable prospect for the grid-scale implementation of metal-ion storage devices. , The change of solvation structure and SEI under sub-zero temperature is beneficial to deepen the understanding of the eutectic interactions and illuminate the eutectics’ future . Moreover, the electrolyte must simultaneously cooperate with all other battery components (cathode, anode, current collector, and separator).…”

Section: Eutectic Electrolytes Driving Low-temperature Mibsmentioning

confidence: 99%

Eutectic Electrolytes Convoying Low-Temperature Metal-Ion Batteries

Qu,

Lu,

Jiang

et al. 2024

ACS Energy Lett.

View full text Add to dashboard Cite

Eutectic electrolytes have been widely used in low-temperature metal-ion batteries (MIBs) due to their good performance regardless of seasonal and regional changes. Durable low-temperature MIBs rely on the constitution, proportion, and solvation-structure construction of eutectic electrolytes to maintain high ionic conductivity and electrochemical stability. Despite the rapid advances in eutectic electrolytes, some key issues, including fundamental mechanisms, theoretical models, aqueous/non-aqueous controversies, and challenges at sub-zero temperatures, need to be addressed. This Review first gives an overview of eutectic chemistry by presenting fundamental analysis and proposing new models to demonstrate the variety of interactions and anti-freezing mechanisms. Then, the thermodynamics and mass transfer, Helmholtz electric double-layer configuration, and electrode–electrolyte interphase are discussed to uncover the influence of the eutectic structure on the electrochemistry of low-temperature MIBs. Finally, a summary and perspectives are provided to guide the design principles and requirements of eutectic systems for applications of MIBs in low-temperature scenarios.

show abstract

“…Molten salt electrolytes of ionic liquids (ILs) overcome safety concerns and widen the operation voltage. They have been widely applied in EESCs because of their thermal stability, fire-retardant properties, and widened electrochemical window [16][17][18]. In the past 20 years, IL-derived eutectic mixtures have attracted significant attention because they share many characteristics with IL.…”

Section: The Emergence Of Eutectic Mixturesmentioning

confidence: 99%