Recent progress of dendrite‐free stable zinc anodes for advanced zinc‐based rechargeable batteries: Fundamentals, challenges, and perspectives

SusMat, Journal Year: 2023, Volume and Issue: 3(2), P. 180 - 206

Published: March 2, 2023

Abstract Zinc‐based batteries are a very promising class of next‐generation electrochemical energy storage systems, with high safety, eco‐friendliness, abundant resources, and the absence rigorous manufacturing conditions. However, practical applications zinc‐based rechargeable impeded by low Coulombic efficiency, inferior cyclability, poor rate capability, due to instability zinc anode. Herein, effective strategies for dendrite‐free anode symmetrically reviewed, especially highlighting specific mechanisms, delicate design electrode current collectors, controlled electrode|electrolyte interface, ameliorative electrolytes, advanced separators design. First, particular mechanisms dendrites formation associated fundamentals stable Zn metal anodes presented elaborately. Then, recent key prevention hydrogen evolution reaction suppression categorized, discussed, analyzed in detail view electrodes, separators. Finally, challenging perspectives major directions briefly discussed further industrialization commercialization batteries.

Language: Английский

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Rationalized Electroepitaxy toward Scalable Single‐Crystal Zn Anodes

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: April 6, 2023

Electroepitaxy is recognized as an effective approach to prepare metal electrodes with nearly complete reversibility. Nevertheless, large-scale manipulation still not attainable owing complicated interfacial chemistry. Here, the feasibility of extending Zn electroepitaxy toward bulk phase over a mass-produced mono-oriented Cu(111) foil demonstrated. Interfacial Cu-Zn alloy and turbulent electroosmosis are circumvented by adopting potentiostatic electrodeposition protocol. The as-prepared single-crystalline anode enables stable cycling symmetric cells at stringent current density 50.0 mA cm-2 . assembled full cell further sustaines capacity retention 95.7% 5.0 A g-1 for 1500 cycles, accompanied controllably low N/P ratio 7.5. In addition Zn, Ni can be realized using same approach. This study may inspire rational exploration design high-end electrodes.

Language: Английский

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Suppressing Rampant and Vertical Deposition of Cathode Intermediate Product via PH Regulation Toward Large‐Capacity and High‐Durability Zn//MnO₂ Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Sept. 14, 2023

Abstract Despite great prospects, Zn//MnO 2 batteries suffer from rampant and vertical deposition of zinc sulfate hydroxide (ZSH) at the cathode surface, which leads to a significant impact on their electrochemical performance. This phenomenon is primarily due drastic increase in electrolyte pH value upon discharging, closely associated with electrodissolution Mn‐based active materials. Herein, change effectively inhibited by employing an additive excellent buffering capability. As such, formation ZSH postponed, resulting horizontal arrangement. strategy can significantly enhance utilization efficiency material, while also enabling solid interphase layer Zn anode address low stripping/plating reversibility. With optimal electrolyte, battery realizes 25.6% specific capacity 0.2 A g −1 compared that baseline rate capability (161.6 mAh 5 ), superior retention (90.2% over 5,000 cycles). In addition, highly applicable hydrogel electrolytes. work underscores importance regulation for provides enlightening insights.

Language: Английский

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Ion Tunnel Matrix Initiated Oriented Attachment for Highly Utilized Zn Anodes

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(33)

Published: May 5, 2023

Abstract Metallic zinc is an ideal anode for aqueous energy storage; however, Zn anodes suffer from nonhomogeneous deposition, low reversibility, and dendrite formation; these lead to overprovision of metal in full cells. Herein, oriented‐attachment‐regulated stacking initiated through a trapping‐then‐planting process with high utilization rate (ZUR) reported. Due the isometric topology features cubic‐type Prussian blue analog (PBA), initial plating occurs at specific sites equal spacing ≈5 Å direction perpendicular substrate; trace amount ions trapped tunnel matrix provides nuclei oriented attachment (002) deposits. As result, PBA‐decorated substrate delivers reversibility dendrite‐free plating/stripping more than 6600 cycles (1320 h) achieves average Coulombic efficiency (CE) 99.5% 5 mA cm −2 100% ZUR. Moreover, anode‐limited cell negative–positive electrode ratio (N/P) 1.2 can be operated stably 360 cycles, displaying density 214 Wh kg −1 ; this greatly exceeds commercial batteries. This work proof concept design practical method developing high‐energy‐density

Language: Английский

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Ultrathin Zincophilic Interphase Regulated Electric Double Layer Enabling Highly Stable Aqueous Zinc-Ion Batteries

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 25, 2024

Abstract The practical application of aqueous zinc-ion batteries for large-grid scale systems is still hindered by uncontrolled zinc dendrite and side reactions. Regulating the electrical double layer via electrode/electrolyte interface an effective strategy to improve stability Zn anodes. Herein, we report ultrathin zincophilic ZnS as a model regulator. At given cycling current, cell with Zn@ZnS electrode displays lower potential drop over Helmholtz (stern layer) suppressed diffuse layer, indicating regulated charge distribution decreased electric repulsion force. Boosted adsorption sites are also expected proved enhanced double-layer capacitance. Consequently, symmetric protection can stably cycle around 3,000 h at 1 mA cm −2 overpotential 25 mV. When coupled I 2 /AC cathode, demonstrates high rate performance 160 mAh g −1 0.1 A long 10,000 cycles 10 . Zn||MnO sustains both capacity 130 after 1,200 0.5

Language: Английский

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