The rising zinc anodes for high-energy aqueous batteries

Hu, Lintong; Xiao, Ping; Xue, Lanlan; Li, Huiqiao; Zhai, Tianyou

doi:10.1016/j.enchem.2021.100052

Cited by 100 publications

(72 citation statements)

References 193 publications

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“… ( a ) Brief summary of recent reviews on Zn metal anodes for AZIBs [ 45 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ], ( b ) a typical full cell battery configuration of AZIBs in a mildly acidic aqueous electrolyte. ( c ) The number of publications on AZIBs from 2010 to 2021 (search from Google Scholar; search time: 7 September 2021).…”

Section: Figurementioning

confidence: 99%

“…As a result, in recent years, various efforts have been made to develop appropriate strategies to overcome the limitations associated with Zn metal anodes. Figure 2 a highlights some representative reviews on Zn metal anodes published over the last three years [ 45 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ]. Currently, AZIBs can be largely categorized into two types: those with alkaline electrolytes, normally Zn-Ag, Zn-air, and Zn-Ni batteries [ 65 , 66 , 67 ].…”

Section: Introductionmentioning

confidence: 99%

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Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

2021

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Over the past few years, rechargeable aqueous Zn-ion batteries have garnered significant interest as potential alternatives for lithium-ion batteries because of their low cost, high theoretical capacity, low redox potential, and environmentally friendliness. However, several constraints associated with Zn metal anodes, such as the growth of Zn dendrites, occurrence of side reactions, and hydrogen evolution during repeated stripping/plating processes result in poor cycling life and low Coulombic efficiency, which severely impede further advancements in this technology. Despite recent efforts and impressive breakthroughs, the origin of these fundamental obstacles remains unclear and no successful strategy that can address these issues has been developed yet to realize the practical applications of rechargeable aqueous Zn-ion batteries. In this review, we have discussed various issues associated with the use of Zn metal anodes in mildly acidic aqueous electrolytes. Various strategies, including the shielding of the Zn surface, regulating the Zn deposition behavior, creating a uniform electric field, and controlling the surface energy of Zn metal anodes to repress the growth of Zn dendrites and the occurrence of side reactions, proposed to overcome the limitations of Zn metal anodes have also been discussed. Finally, the future perspectives of Zn anodes and possible design strategies for developing highly stable Zn anodes in mildly acidic aqueous environments have been discussed.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

2021

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“…[25] The Zn metal also has a high capacity of 820 mAh g À 1 and volumetric capacity of 5854 mAh cm À 3 , [24] low redox potential of À 0.762 V (vs. standard hydrogen electrode, SHE), and it shows a large HER overpotential in aqueous electrolytes. [26]…”

Section: Zinc Anodementioning

confidence: 99%

“…Discharge/Charge Processes in Alkaline Electrolyte: [26,27] Electro-oxidation: During the discharge process, the Zn metal losses two electrons (e À ) to form Zn 2 + ions. The overall reaction of Zn anode during the discharging/ charging process in the alkaline electrolyte is given in Equation ( 1).…”

Section: Zinc Anode Reaction Mechanismmentioning

confidence: 99%

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Efforts at Enhancing Bifunctional Electrocatalysis and Related Events for Rechargeable Zinc‐Air Batteries

et al. 2021

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Rechargeable zinc-air batteries (RZABs) are one of the most promising next-generation energy-storage technologies for stationary applications (home and industry), wearable and portable electronics, and transportation (including electric vehicles) due to their high energy density, environmental friendliness, safety, and low cost. However, RZABs still face serious challenges (such as sluggish oxygen reactions, poor durability, inferior reversibility of the zinc anode, and low cell energy efficiency) that conspire against their widespread commercialization. The reactions that occur at the three key components of the RZAB (air cathode, zinc anode, and electrolyte) cooperatively conspire against its performance. Thus, this review focuses on the bifunctional electrocatalytic events at the cathode (i. e., oxygen reduction reaction (ORR) and oxygen evolution reaction (OER)). That is in addition to the recent developments aimed at mitigating the performance-limiting events at the anode and the electrolytes. This review directs the attention of researchers and users to the critical areas for the development of the next-generation RZABs.

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Multi‐Healable, Mechanically Durable Double Cross‐Linked Polyacrylamide Electrolyte Incorporating Hydrophobic Interactions for Dendrite‐Free Flexible Zinc‐Ion Batteries

Wang

Cheng

2023

Adv Funct Materials

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Flexible aqueous zinc‐ion batteries (ZIBs) are considered as one of the most promising energy storage candidates for wearable electronics, owing to their environmental friendliness, low cost, high safety, and high theoretical capacity. However, the practical application of flexible ZIBs is significantly impeded by the Zn dendrite growth and the poor mechanical endurability at the electrolyte–electrode interface. Mechanically durable hydrogel electrolyte with dendrite growth restriction and self‐healing ability is highly desirable to improve the durability and extend the lifetime of the flexible ZIBs. However, it is still a big challenge to simultaneously endow hydrogel electrolytes with all necessary properties. Herein, multi‐healable and mechanically durable hydrogels are fabricated by the synergy effect of strong chemical cross‐linking and dynamic physical hydrophobic associations. The obtained double cross‐linked polyacrylamide electrolyte (PAAm‐O‐B) has good tensile strain, strength, and stable electrochemical performance, with tensile strength up to 75 kPa, high self‐healing efficiency up to 50 broken‐healed cycles and lifespan up to 900 h dendrite inhibition behavior. The flexible Zn//MnO2 batteries using PAAm‐O‐B hydrogel electrolytes exhibit good mechanical durability with high specific capacity and long cycle lifespan even under 1000 bending deformations and superior self‐healing ability.

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The rising zinc anodes for high-energy aqueous batteries

Cited by 100 publications

References 193 publications

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

Efforts at Enhancing Bifunctional Electrocatalysis and Related Events for Rechargeable Zinc‐Air Batteries

Multi‐Healable, Mechanically Durable Double Cross‐Linked Polyacrylamide Electrolyte Incorporating Hydrophobic Interactions for Dendrite‐Free Flexible Zinc‐Ion Batteries

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