Hydrophobic and zincophilic organic hierarchical nano-membranes with ordered molecular packing for stable zinc metal anodes

Energy storage materials, Journal Year: 2024, Volume and Issue: 70, P. 103513 - 103513

Published: May 24, 2024

Language: Английский

---

Promising Electrolyte Additive-Induced Multifunctional Alloy Interphase Enabling Stable Zinc Anodes for Aqueous Zinc-Ion Batteries

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(13), P. 12212 - 12220

Published: June 19, 2024

Excessive dendrite formation and side reactions compromise the reversibility stability of zinc anodes, obstructing deployment aqueous zinc-ion batteries. An economical, yet effective solution involves deploying electrolyte additives for a solid interphase (SEI) on metal anodes. Managing to fabricate an optimal SEI via these remains challenging. Here, we introduce cost-effective copper sulfate additive, enabling creation multifunctional copper–zinc alloy SEI. The SEI's superior electrical conductivity, zincophilic sites, ample free space, elevated surface energy facilitate homogeneous Zn nucleation deposition, thereby expediting electrochemical kinetics mitigates formation. Additionally, uniform suppresses corrosion hydrogen evolution reaction, augmenting deposition/dissolution reversibility. Consequently, Zn||Zn symmetric cells with additive exhibiting remarkable cycling over 5000 h at 0.5 mA cm–2, extraordinary average Coulombic efficiency 99.4% lifespan 1600 stable voltage hysteresis 2 cm–2 cm–2. This study proposes suitable high-performance

Language: Английский

---

Rescuing zinc anode–electrolyte interface: mechanisms, theoretical simulations and in situ characterizations

Chemical Science, Journal Year: 2024, Volume and Issue: 15(19), P. 7010 - 7033

Published: Jan. 1, 2024

The research interest in aqueous zinc-ion batteries (AZIBs) has been surging due to the advantages of safety, abundance, and high electrochemical performance. However, some technique issues, such as dendrites, hydrogen evolution reaction, corrosion, severely prohibit development AZIBs practical utilizations. underlying mechanisms regarding performance deterioration structure degradation are too complex understand, especially when it comes zinc metal anode-electrolyte interface. Recently, theoretical simulations

Language: Английский

---

Delocalized Electron Engineering of MXene-Immobilized Atomic Catalysts toward Fast Desolvation and Dendritic Inhibition for Low-Temperature Zn Metal Batteries

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Rechargeable low-temperature aqueous zinc metal batteries (LT-AZMBs) are considered as a competitive candidate for next-generation energy storage systems owing to increased safety and low cost. Unfortunately, sluggish desolvation kinetics of hydrated [Zn(H2O)x]2+ inhomogeneous ion flux cause detrimental hydrogen evolution reactions (HER) Zn dendrite growth. Herein, the atomic iron well-implanted onto MXene via defect capture (SAFe@MXene) has been initially proposed modulate plating. The SAFe@MXene serves kinetic promoters enhance interfacial prevent HER uniformizes Zn2+ smooth deposition, confirmed by theoretical simulation, Raman electrochemical tests. Consequently, under 0 °C, SAFe@MXene-modulated electrodes deliver long-term stability 800 h with lower overpotentials even at 5 mA cm–2 or higher plating/stripping capacity. full cell MnO2 cathode stabilizes high capacity-retention nearly 100% after 1000 cycles 1 A g–1, suggesting great promise high-performance LT-AZMBs.

Language: Английский

---

Tough MXene-Cellulose Nanofibril Ionotronic Dual-Network Hydrogel Films for Stable Zinc Anodes

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Developing ionotronic interface layers for zinc anodes with superior mechanical integrity is one of the efficient strategies to suppress growth dendrites in favor cycling stability aqueous zinc-ion batteries (AZIBs). Herein, we assembled robust 2D MXene-based hydrogel films cross-linked by 1D cellulose nanofibril (CNF) dual networks, acting as stabilize Zn anodes. The MXene-CNF integrated multifunctionalities, including a high in-plane toughness 18.39 MJ m-3, in-plane/out-of-plane elastic modulus 0.85 and 3.65 GPa, mixed electronic/ionic (ionotronic) conductivity 1.53 S cm-1 0.52 mS cm-1, zincophilicity binding energy (1.33 eV) low migration barrier (0.24 Zn2+. These endowed coupled multifield effects, strong stress confinement uniform ionic/electronic field distributions on anodes, effectively suppressed dendrite growth, proven experiments simulations. An example MXene-CNF|Zn showed reduced nucleation overpotential 19 mV, an extended life over 2700 h Zn||Zn cells, capacity 323 mAh g-1 Zn||MnO2 compared bare Zn. This work offers approach exploring mechanically 1D/2D AZIBs.

Language: Английский

---