A perspective on the role of anions in highly concentrated aqueous electrolytes

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(4), P. 1480 - 1501

Published: Jan. 1, 2023

Highly concentrated (water-in-salt) electrolytes possess peculiar ionic interactions, solvation structure, ion transport, capability to form an SEI, etc. This perspective discusses the role of salt anion on such properties.

Language: Английский

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Recent status and future perspectives of 2D MXene for micro-supercapacitors and micro-batteries

Energy storage materials, Journal Year: 2022, Volume and Issue: 51, P. 500 - 526

Published: July 4, 2022

Language: Английский

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Recent advances in manipulating strategy of aqueous electrolytes for Zn anode stabilization

Energy storage materials, Journal Year: 2023, Volume and Issue: 56, P. 227 - 257

Published: Jan. 16, 2023

Language: Английский

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Synergetic modulation on ionic association and solvation structure by electron-withdrawing effect for aqueous zinc-ion batteries

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(15)

Published: April 6, 2023

Aqueous zinc-ion batteries are emerging as one of the most promising large-scale energy storage systems due to their low cost and high safety. However, Zn anodes often encounter problems dendrite growth, hydrogen evolution reaction, formation by-products. Herein, we developed ionic association electrolytes (LIAEs) by introducing 2, 2-trifluoroethanol (TFE) into 30 m ZnCl 2 electrolyte. Owing electron-withdrawing effect -CF 3 groups in TFE molecules, LIAEs, 2+ solvation structures convert from larger aggregate clusters smaller parts will construct H-bonds with H O structure simultaneously. Consequently, migration kinetics significantly enhanced ionization solvated is effectively suppressed LIAEs. As a result, LIAE display fast plating/stripping Coulombic efficiency 99.74%. The corresponding full exhibit an improved comprehensive performance such high-rate capability long cycling life.

Language: Английский

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Low‐Temperature Sodium‐Ion Batteries: Challenges and Progress

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: Feb. 15, 2024

Abstract As an ideal candidate for the next generation of large‐scale energy storage devices, sodium‐ion batteries (SIBs) have received great attention due to their low cost. However, practical utility SIBs faces constraints imposed by geographical and environmental factors, particularly in high‐altitude cold regions. In these areas, low‐temperature (LT) performance presents a pressing technological challenge that requires significant breakthroughs. LT environments, electrochemical reaction kinetics are sluggish, electrode/electrolyte interface is unstable, diffusion sodium ions electrode materials slow, leading decrease battery performance. Therefore, reasonable design electrolyte significance optimizing SIBs. this review, research progress electrolytes, cathode, anode materials, as well metal solid‐state electrolytes systematically summarized recent years, aiming understand principles SIBs, clarify basic development high‐performance applications, promote technology full temperature range.

Language: Английский

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

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(8)

Published: Jan. 8, 2023

Abstract 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 conventional aqueous electrolytes results sluggish kinetics inferior ion transport efficiency under temperature, severely restricting their further development practical applications. In order deal with existing issues, design principles develop low‐temperature ARES excellent performance are discussed in‐depth precisely classified, primarily respect electrode modification electrolyte regulation. addition, related studies about systematically comprehensively summarized. Finally, critical bottlenecks, some suggestions, future perspectives also provided, which will help address current challenges ARES. This review is expected deepen fundamental understanding offer guiding suggestions boost

Language: Английский

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Boosting Ion Diffusion Kinetics of MXene Inks with Water‐in‐Salt Electrolyte for Screen‐Printed Micro‐Supercapacitors

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: March 28, 2024

Abstract Flexible wearable electronics are in urgent need of advanced micro‐energy storage devices. MXenes widely used supercapacitors because their excellent conductivity and hydrophilicity. Nevertheless, MXene‐based typically exhibit low capacitance unsatisfied rate performance, particularly the solid compact MXene film electrode with limited porosity and/or ion diffusion paths. Here, synthesis inks enlarged interlayer spacing for facilitated kinetics by intercalating lithium ions is reported. The ion‐intercalated further screen‐printed scalable production micro‐supercapacitors (MSCs). Benefiting from such an architecture design, as well wide voltage window 21 m bis(trifluoromethane)sulfonimide (LiTFSI) water‐in‐salt electrolyte, device exhibits impressive areal (252 mF cm −2 ), much‐improved performance (capacitance retention high 80%), cyclic stability (retains 98.4% initial after 10 000 cycles) flexibility, showing great potential field intelligent electronics.

Language: Английский

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Advanced Characterization Techniques on Mechanism Understanding and Effect Evaluation in Zinc Anode Protection

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 24, 2024

Abstract The growing environmental pollution issues and continuous energy dilemma call for high‐performance storage systems (ESSs). While the inevitable safety concerns appear restrict application of lithium‐ion batteries in large‐scale ESSs. Contrastively, zinc ion (ZIBs) attract increasing attention due to inherent advantages high safety, low cost, friendliness. However, poor stability reversibility Zn anodes bring severe difficulty its practical application. Considerable efforts are devoted anode modification, such as electrolyte adjustment, interfacial engineering, structure design, but there is still a fuzzy field concerning reaction process, regulation mechanism, modified effect. Reviewing history, development various electrodes greatly depends on breakthrough advanced characterization technologies, while summarizations technological advances deficient. Hence, this review concentrates recent progress techniques related strategies protection. information especially highlighted that each technique can offer crucial or auxiliary role they play proving specific issues. Furthermore, opinions current limitations future directions common also discussed detail, aiming give comprehensive perspective designing anodes.

Language: Английский

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Boron‐Stabilized Anisotropic Water‐in‐Polymer Salt Electrolyte with an Exceptionally Low Salt Concentration by Hofmeister Effect for Aqueous Lithium‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Water-based electrolytes provide safe, reliable, and cost-effective energy storage solutions; however, their application in aqueous lithium-ion batteries is hindered by low density short cycling life due to the limited electrochemical stability window. While high lithium salt concentrations can mitigate some of these issues, they often lead increased solvent viscosity higher costs, limiting commercialization. In this study, a boron-stabilized anisotropic polyvinyl alcohol (PVA) hydrogel electrolyte, referred as BaP, proposed address challenges related (LiTFSI) concentrations. Due Hofmeister effect, BaP water-in-polymer electrolyte retain concentration even when are used. Briefly, promotes salting-in phenomenon Li ions, while TFSI ions induce salting-out, allowing synergistically achieve unique characteristics, exhibits wide window similar that highly concentrated electrolytes, enabling stable operation LiMn2O4||Li4Ti5O12 full cell suppressing hydrogen evolution. Moreover, biodegradability contributes development more environmentally friendly battery system.

Language: Английский

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Locking Water Molecules Loss of PAA Hydrogel for Flexible Zinc‐Air Battery with NaCl Doping

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(49)

Published: July 25, 2023

Abstract Flexible zinc‐air batteries have received widespread attention due to their high specific energy and eco‐friendly environment. However, the water in hydrogel is easily lost external environment because of semi‐open structure batteries, leading performance degradation batteries. Here a saline gel NaCl‐KOH‐PAA (sodium chloride‐potassium hydroxide‐polyacrylic acid) without soaking alkaline solution before use designed, refining grid reducing loss through NaCl doping. Meanwhile, exhibits no significant decrease ion conductivity after doping can maintain stability around 170 150 mS cm −1 at room temperature −20 °C, respectively. The results demonstrate that lifetime flexible with NaCl‐doped be extended by nearly 50%. also displays superior flexibility under extreme physical deformation conditions. Moreover, phenomenon delamination observed mechanism retention uncovered. These findings will pave way for developing battery.

Language: Английский

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