In-situ hybrid armor layer enabled by additive-anion synergy for dendrite-free and stable Zn anode

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161917 - 161917

Опубликована: Март 1, 2025

Язык: Английский

---

Unlocking the Potential of Aqueous Zinc-Ion Batteries: Hybrid SEI Construction through Bifunctional Regulator-Assisted Electrolyte Engineering

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Aqueous zinc-ion batteries (AZIBs) represent promising candidates for energy storage devices, because of their inherent high safety and cost efficiency. However, challenges such as uneven zinc ion deposition during electrochemical reduction anode interface side reactions pose significant obstacles to advancement practical deployment. Herein, a medium-concentration aqueous electrolyte combined with bifunctional regulator (aspartame) is developed address these issues. Practical validation experiments theoretical calculations demonstrate that the Zn(OTf)2 containing Aspartame can form robust hybrid solid (SEI) ZnF2 ZnS by simultaneously modulating Zn2+ solvation structure optimizing metal-molecule interface, thereby enabling dense Zn deposition. It achieves dendrite-free plating stripping excellent reversibility. Significantly, Zn||V2O5 full cell exhibits an average capacity 240 mAh g-1 over 8000 cycles at 5 A g-1. This work provides new insight into design high-performance AZIBs.

Язык: Английский

---

Strengthened Zinc Anode by Trace Natural Amino Acid β-Alanine in Aqueous Electrolyte Inspired by Synial Membrane: An Experimental Survey

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Zinc corrosion, hydrogen evolution reaction, uneven deposition, and dendrite growth on the zinc anodes are key factors restraining electrochemical performance cycling stability of aqueous zinc-ion batteries. In this study, learned from synial membrane, a tiny amount natural amino acid β-alanine (β-Ala, 0.089 wt %) was introduced as additive in ZnSO4 electrolyte for strengthening kinetics anode well enhancing ions A number modern surface techniques analyses were employed to reveal fundamental reasons strengthened by β-Ala electrolyte. The results show that could be adsorbed electrode through intermolecular chelation, which might regulate chemical environments promote uniform deposition ions. Hence, adsorption film suppress reaction formation dendrites, thereby significantly improving deposition/stripping process anode. particular, strong bonding restrain migration H2O molecules approaching surface, preventing invasion water surface. Therefore, addition dilute remarkably prolong life span Zn||Zn symmetric batteries 5000 h under 1 mA cm–2 mAh cm–2, 450 5 3 at 298 K, is much longer than zinc–zinc cells including bare (only 95 200 cm–2). Furthermore, found improve Zn||Cu asymmetric Zn||V2O5 full cells. This study provides an effective method engineering electrolytes inspire rechargeable selecting ideal biomolecules additives.

Язык: Английский

---

Customized Design of R‐SO₃H‐Containing Binders for Durable Iodine‐Loading Cathode of Zinc–Iodine Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Abstract The challenges of iodine dissolution and polyiodide shuttle behavior severely hinder the development zinc–iodine batteries (ZIBs). Among battery components, binders play a vital role in maintaining mechanical integrity facilitating conversion reaction iodine‐loading cathode ZIBs. Herein, series polyimide‐based polymers rich sulfonic acid group (R‐SO 3 H) are elaborately designed as functional for cathodes. According to spectroscopic characterization theoretical calculation results, PI‐4S binder with R‐SO H, hydroxyl imide groups holds stronger chemisorption capability I 2 /I − species, which effectively helps block active iodine's behavior. As result, corresponding ZIBs deliver reversible capacity 142.7 mAh g −1 over 600 cycles at 0.2 A , high 157.6 500 0.5 50 °C, durable cycling stability 88 15000 4 . This work guides autonomous design multifunctional polymer cathodes facilitates practical application

Язык: Английский

---

Gas‐Phase Conversion Promising Controlled Construction of Functional ZnF₂/V₂CT_x for Stabilizing Zn Metal Anodes Toward Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract The practical application of aqueous zinc‐ion batteries (AZIBs) is impeded by notorious side reactions occurring at the zinc anode including dendrite growth, hydrogen evolution reaction and anodic corrosion. To address these issues, ZnF 2 combined with V C MXene composite (ZnF /V CT x ) in‐situ synthesized from ZnC MAX through a facile gas‐phase fluorination strategy utilized as an efficient protective coating layer for Zn anode. ionically conductive hydrophobic inhibits promotes uniform distribution migration 2+ . Meanwhile, electronically effectively homogenizes electric field reduces local current density. Consequently, stable, dendrite‐free excellent cycling stability (over 2100 h 3.0 mA cm −2 achieved. Furthermore, not only significantly improves reversibility deposition/stripping, but efficiently electrochemical polarization. When paired vanadate (Zn O 7 ZnV 3 8 cathode derived directly oxidation ZnC, full cells exhibit 1000‐cycle lifespan 5.0 A g −1 , superior rate performance (≈237.6 mAh 10.0 ). This work presents novel to controllably construct phase derivatives next‐generation AZIBs.

Язык: Английский

---

Customizing Helmholtz Plane with N, F, P Tri‐Doped rGO/CNT Aerogel Protective Layer for Long‐Life Zinc‐Ion Batteries

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Апрель 10, 2025

Abstract The practical application of aqueous zinc‐ion batteries (AZIBs) is impeded by dendrite formation and water‐induced parasitic reactions at the anodes. In this article, a relatively hydrophobic inner Helmholtz plane (IHP) an outer (OHP) with abundant nucleation sites are engineered through coating N, F, P heteroatom doped reduced graphene oxide/carbon nanotube (NFP‐rGO‐CNT) multifunctional aerogel protective layer. rGO certain hydrophobicity construct lean‐water environment IHP, effectively blocking adverse between water metallic Zn, while zincophilic uniformly distributed heteroatoms facilitate Zn 2+ migration homogenize flux OHP, thereby promoting directional deposition along (002) crystal plane. Consequently, fabricated NFP‐rGO‐CNT/Zn//Cu asymmetric cell exhibits high Coulombic efficiency close to 100% for 3200 cycles. addition, symmetric assembled NFP‐rGO‐CNT/Zn electrodes presents impressive lifespan 1990 h 5 mA cm −2 2 mAh , significantly outperforming control group (about 27 h). More remarkably, NFP‐rGO‐CNT/Zn//V O 3 pseudo‐pouch capable powering small fan rotate steadily. This layer strategy offers novel perspective HP regulation, enabling textured reversible

Язык: Английский

---

Specific adsorption effect induces differential deposition structures to achieve 2-year stable cycling of zinc metal anodes

Energy storage materials, Год журнала: 2025, Номер 78, С. 104249 - 104249

Опубликована: Апрель 18, 2025

Язык: Английский

---