Electrolyte design for aqueous Zn batteries

Joule, Journal Year: 2025, Volume and Issue: unknown, P. 101844 - 101844

Published: Feb. 1, 2025

Context & scaleZn-based batteries with aqueous electrolytes are garnering great interest as the most promising next-generation due to their intrinsic high safety, low cost, and environmental friendliness. However, short cycle life of Zn battery, originating from reversibility metal electrode, is far satisfactory. To achieve tackling water decomposition reaction inhomogeneous deposition/dissolution crucial. We present design principles for co-solvent suggest a new parameter accurately selecting beneficial organic molecules Zn-based batteries. Electrolytes prepared using this principle effectively overcome challenges in systems demonstrate record-high cycling stability. This work provides insight into electrolyte systems.Highlights•Thorough suggested batteries•An effective descriptor discovered•Designed stability batteriesSummaryPolarity scales often used descriptors battery (AZB) electrolytes. failure predict solvation Zn2+ raises questions about applicability designing high-performance AZB Here, Dimroth Richardt's Et(30) polarity scale introduced an guideline screening molecules. A clear volcanic correlation demonstrated between Coulombic efficiency (CE). common consensus formula, which typically uses highly polar improve CE, indicates that roles beyond altering structure critical obtaining performances. Based on scale, designed achieves average CE (99.8%), exceptionally long (5,500 h), specific energy (110 Wh kg−1). offers general frameworks electrolytes.Graphical abstract

Language: Английский

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Anti-Freezing Hydrogel Electrolyte with Regulated Hydrogen Bond Network Enables High-Rate and Long Cycling Zinc Batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

1,2-Propylene glycol modulates the hydrogen bond network and solvation sheath structure of polyacrylamide hydrogel electrolytes, reducing solvent–solvent interactions, promoting uniform Zn 2+ deposition, enhancing AZIB cycling stability.

Language: Английский

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Electrolyte engineering for optimizing anode/electrolyte interface towards superior aqueous zinc-ion batteries: A review

Transactions of Nonferrous Metals Society of China, Journal Year: 2024, Volume and Issue: 34(10), P. 3118 - 3150

Published: Oct. 1, 2024

Language: Английский

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Designing Antifreeze Electrolytes with Colloid‐Like Structures for High‐Rate Performance in Aqueous Zinc‐Ion Batteries

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Optimizing the electrolyte configuration is an effective strategy to enhance cycle life of aqueous zinc‐ion batteries (AZIBs). A critical challenge in development involves improving antifreeze characteristics without compromising high‐rate performance for AZIBs. This study selects polymer polysaccharide konjac glucomannan (KGM) as additive, aiming utilize its naturally formed stable colloidal system solution, which exhibits superior rheological properties. can effectively balance with requirements cell under charge–discharge conditions, thereby enhancing overall cell. Therefore, zinc anode cycling 1250 h at 25 °C conditions 7 mA cm −2 and 3.5 mAh . At ‐10 °C, sustained over 800 1 In full cells, delivers a discharge capacity 77.9 g −1 after 7500 cycles current density 15 °C. Even 102.7 660 3 KGM offers cost‐effective, environmentally friendly solution improve AZIBs' reliability capabilities.

Language: Английский

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Revealing the Triangular Entanglement of Hydrogen Bond Network via Kosmotropic Effect for Durable Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Abstract Regulating the H‐bond network between H 2 O molecules has been regarded as an effective strategy to reconfigure chemical environment at electrode/electrolyte interface (EEI), but intrinsic relationship hydrogen‐bond (H‐bond) network, solvation structure, and EEI in electrolyte remains unclear. To this end, three additives with same carbon skeleton different hydroxyl functional groups are chosen unlock their triangular relationship. Experimental theoretical calculations demonstrate that 2‐methyl‐1,3‐propanediol (MP) bearing strong kosmotropic effect modest steric‐hindrance not only form a stable H‐bonds by breaking original of also reconstruct structure Zn 2+ , predominantly inhibiting O‐triggered side reactions. Meanwhile, synergistic direction on MP ensures adsorption EEI, promoting uniform diffusion deposition. Consequently, assembled Zn||Zn symmetric cell provides 3000 h cycle life (0.5 mA cm −2 0.5 mAh ) ZnSO 4 +MP electrolyte, Zn||Cu asymmetric maintains high CE 99.41% after 1000 cycles 1 . The full exhibits excellent rate capability satisfactory discharge‐specific capacity.

Language: Английский

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Interfacial Hydrogen-Bond Network Regulation Tuned Water Dissociation Enables Selective Chlorination of Alkenes

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(9), P. 8024 - 8031

Published: Feb. 20, 2025

Electrocatalytically selective chlorination of olefins in Cl--containing solutions is a sustainable method for synthesizing chlorohydrin/vicinal dichloride; however, controlling the selectivity challenging. Here, aqueous/dimethyl carbonate (DMC) hybrid electrolytes with different H2O/DMC ratios are designed to modulate ·OH formation increase corresponding selectivities. The combined results in/ex situ spectroscopies and molecular dynamics simulations reveal origin high selectivity. TFSI- shields transportation free H2O provide moderate synthesis chlorohydrin. DMC reconstructs hydrogen bonds minimize interaction between them anode, matching requirements vicinal dichloride production. Thus, these not only achieve selectivities 80% 76% chlorohydrin dichloride, respectively, but also enable other isolated yields up 74%. This work provides facile strategy regulate anodic via rational electrolyte design.

Language: Английский

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Electrochemical Performance of Zn/CF_x Primary Battery under Different Electrolytes

Energy Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Fluorinated carbon (CF x ) is one of the most promising cathode materials for metal primary batteries. However, usage CF zinc‐based batteries relatively seldom reported. Herein, employed as material Zn‐based batteries, and corresponding electrochemical performance under a series aqueous electrolytes also systematically investigated. The results reveal that among all investigated exhibits highest capacity with value high 827 mAh g −1 alkaline NaOH electrolyte environment, maximum can reach 632, 607, 352, 66 those weak (sodium potassium salts) acid (zinc environment. In addition to capacity, displays best rate remarkable power density 37607.19 W kg at current 50 000 mA largest specific energy 674 Wh 100 electrolytes. This work offers insights guidance design high‐performance Zn/CF which are characterized by their low cost, excellent safety performance, high‐power density.

Language: Английский

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Harnessing Biological Insights: Integrating Proton Regulation, pH Buffer and Zincophility for Highly Stable Zn Anode

Nano Energy, Journal Year: 2024, Volume and Issue: 132, P. 110398 - 110398

Published: Oct. 22, 2024

Language: Английский

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Chain Effect-controlled Solvation Chemistry and Interfacial Microstructure Enables Highly Reversible Zn Metal Anode

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104039 - 104039

Published: Jan. 1, 2025

Language: Английский

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Coupling of Donor–Acceptor of Hydrogen Bonds Manipulated Electrolyte Structure Enables Hydrogen Evolution‐Free and Durable Zn Metal Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract The undesirable hydrogen evolution reaction (HER) primarily contributes to the instability of Zn anode, which exacerbates corrosion and dendrite growth impedes application metal battery in large‐scale energy storage. Although engineering functional aqueous electrolyte prominently controls HER, it hardly eradicates occurrence HER from source. Herein, this research utilizes coupling donor–acceptor bonds (H‐bonds) manipulate structure design a novel methanol (MeOH)‐based anhydrous organic with propylene carbonate (PC) as co‐solvent, fundamentally eliminating accompanied by suppressed growth. PC molecules acceptor strengthen H‐bonds networks between MeOH donor weaken interaction cations anions, enhancing stability reducing anion‐involved by‐products formation. Meanwhile, preferential adsorbed on anode surface form favorable component‐dominated solid interface layer, inducing uniform deposition along (002) orientation. Consequently, exhibits excellent cycling high reversibility. assembled cells also harvest satisfactory low‐temperature tolerance. More importantly, corresponding Zn||PANI full cell pouch behave an impressive capacity retention 92.4% 91.1% after 3200 1400 cycles, respectively.

Language: Английский

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