Ultrafast rate capability of V2O5 yolk-shell microspheres with hierarchical nanostructure as an aqueous lithium-ion battery anode

Zhou, Su; Zhao, Mingshu; Zheng, Qingyang; Jiao, Lidong; Shi, Mangmang; Li, Min; Xu, Tong; Zhao, Xuebing

doi:10.1016/j.electacta.2021.139792

Cited by 15 publications

(7 citation statements)

References 52 publications

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“…The Li + (de)intercalation charge-storage process at the V 2 O 5 framework can be expressed as normalV 2 normalO 5 + x Li + + x normale − ⇌ Li x normalV 2 normalO 5 where 0 ≤ x ≤ 1. The observed two pairs of redox peaks are commonly ascribed to phase transition from α-V 2 O 5 to ε-Li 0.5 V 2 O 5 and ε-Li 0.5 V 2 O 5 to δ-LiV 2 O 5 , respectively. , Peak-to-peak separation of 100 mV at 0.18/0.28 V and 120 mV at −0.04/0.08 V at a scan rate as high as 0.5 V/s suggests fast redox kinetics.…”

Section: Resultsmentioning

confidence: 89%

“…The observed two pairs of redox peaks are commonly ascribed to phase transition from α-V 2 O 5 to ε-Li 0.5 V 2 O 5 and ε-Li 0.5 V 2 O 5 to δ-LiV 2 O 5 , respectively. 4,38 Peakto-peak separation of 100 mV at 0.18/0.28 V and 120 mV at −0.04/0.08 V at a scan rate as high as 0.5 V/s suggests fast redox kinetics.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Vanadium oxides (VO x ) have been widely used in energy storage devices such as rechargeable batteries and supercapacitors because of their unique layered structure, multivalent oxidation states, and low cost. , Among them, V 2 O 5 exhibits excellent performance as a pseudocapacitive material due to its fast charging/discharging kinetics and relatively high theoretical capacity. , Meanwhile, it suffers from unsatisfied conductivity, structural collapse, and dissolution of vanadium in electrolyte solutions. In general, the electrochemical process of pseudocapacitive materials consists of surface-limited charging and a diffusion-controlled Faradaic process .…”

Section: Introductionmentioning

confidence: 99%

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Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy

Cong

Zhao

et al. 2023

Anal. Chem.

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V 2 O 5 is a promising pseudocapacitive material for electrochemical energy storage with balanced power and energy density. Understanding the charge-storage mechanism is of significance to further improve the rate performance. Here, we report an electrochemical study of individual V 2 O 5 particles using scanning electrochemical cell microscopy with colocalized electron microscopy. A carbon sputtering procedure is proposed for the pristine V 2 O 5 particles to improve their structure stability and electronic conductivity. The achieved high-quality electrochemical cyclic voltammetry results, structural integrity, and high oxidation to reduction charge ratio (as high as 97.74%) assured further quantitative analysis of the pseudocapacitive behavior of single particles and correlation with local particle structures. A broad range of capacitive contribution is revealed, with an average ratio of 76% at 1.0 V/s. This study provides new opportunities for quantitative analysis of the electrochemical charge-storage process at single particles, especially for electrode materials with electrolyte-induced instability.

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Section: Resultsmentioning

confidence: 89%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy

Cong

Zhao

et al. 2023

Anal. Chem.

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“…[ 11 ] Charge carriers, as a core component of aqueous batteries, directly determine their electrochemical nature and energy‐storage behaviors. [ 12 ] Over the past decade, the research interests and achievements in aqueous batteries based on metal‐ion charge carriers (e.g., Li + , Na + , K + , Zn 2+ Mg 2+ , and Al 3+ ) [ 13–18 ] have surged for their high energy density, high volumetric energy density, and excellent stability. [ 19 ] Despite these great features, metal‐ion aqueous batteries have a poor ability to deliver instantaneous power output due to the sluggish ion‐transport caused by the large solvation radius and strong electrostatic interactions.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Organic Batteries Using the Proton as a Charge Carrier

Shi

Das

et al. 2023

Advanced Materials

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Benefiting from the merits of low cost, non‐flammability and high operational safety, aqueous rechargeable batteries have emerged as promising candidates for large‐scale energy storage applications. Among various metal‐ion/non‐metallic charge carriers, proton (H+) as a charge carrier possesses numerous unique properties such as a fast proton diffusion dynamics, a low molar mass and a small hydrated ion radius, which endow aqueous proton batteries (APBs) with a salient rate capability, a long‐term life span and an excellent low‐temperature electrochemical performance. In addition, redox‐active organic molecules, with the advantages of structural diversity, rich proton‐storage sites and abundant resources, are considered as attractive electrode materials for APBs. However, as far as application is concerned, the charge storage and transport mechanisms of organic electrodes in APBs is still in infancy. Therefore, finding suitable electrode materials and uncovering the H+ storage mechanisms are significant for the applications of organic materials in APBs. Herein, the latest research progresses on organic materials such as small molecules and polymers for APBs are reviewed. Furthermore, a comprehensive summary and evaluation of APBs employing organic electrodes as anode and/or cathode is provided, especially on their low‐temperature and high‐power performances, along with systematic discussions for guiding the rational design and the construction of APBs based on organic electrodes.This article is protected by copyright. All rights reserved

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“…Aqueous rechargeable batteries (ARBs) that employ aqueous electrolytes have the advantages of low cost, high safety, and easily scaled-up production, making them promising candidates for grid energy storage. − Although many kinds of cathodes (e.g., LiMn 2 O 4 , Na 3 V 2 (PO 4 ) 3 , MnO 2 , Prussian blue, organic pyrene-4,5,9,10-tetraone (PTO), calix[4]quinone (C4Q), etc.) and anodes (e.g., V 2 O 5 , LiV 3 O 8 , LiTi 2 (PO 4 ) 3 , NaTi 2 (PO 4 ) 3 , metal Zn, organic poly(pyrene-4,5,9,10-tetraone), cyano-substituted diquinoxalinophenazine, phenazine, etc.) have been successfully developed for different types of aqueous metal-ion batteries (e.g., Li + , Na + , K + , Zn 2+ , Mg 2+ , Al 3+ , etc.)…”

mentioning

confidence: 99%

Quantitative Chemistry in Electrolyte Solvation Design for Aqueous Batteries

Zhang

Guo³

et al. 2023

ACS Energy Lett.

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Aqueous electrolyte design is pivotal for boosting the energy density and lifespan of aqueous batteries, because it can expand the electrochemical stability window and also mitigate the parasitic side reactions. Until now, three main kinds of electrolytes, i.e., water-in-salt, eutectic, and additives-modified electrolytes, have been developed by which the activity of H2O can be lowered and/or the formed specific solid–electrolyte interphase (SEI) can mitigate the decomposition of H2O. However, there is still a lack of a universal model to elucidate the reason for the improved performance, especially as the SEI interpretation becomes ever more controversial. Herein, we present a quantitative and graphical model of the electrolyte solvation structure and metal-ion (de)solvation process (i.e., interfacial model) to summarize a relationship between the electrolyte–electrode interfacial chemistry and electrode performance. This Focus Review extends the solvation structure and interfacial model into the field of aqueous electrolytes, revealing the essential influence of the solvation structure’s properties on electrolyte stability and electrode performance, by which electrode performance and electrolyte design can be more quantitatively and accurately understood.

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Ultrafast rate capability of V2O5 yolk-shell microspheres with hierarchical nanostructure as an aqueous lithium-ion battery anode

Cited by 15 publications

References 52 publications

Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy

Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy

Aqueous Organic Batteries Using the Proton as a Charge Carrier

Quantitative Chemistry in Electrolyte Solvation Design for Aqueous Batteries

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Ultrafast rate capability of V2O5 yolk-shell microspheres with hierarchical nanostructure as an aqueous lithium-ion battery anode

Cited by 15 publications

References 52 publications

Measuring the Pseudocapacitive Behavior of Individual V2O5 Particles by Scanning Electrochemical Cell Microscopy

Measuring the Pseudocapacitive Behavior of Individual V2O5 Particles by Scanning Electrochemical Cell Microscopy

Aqueous Organic Batteries Using the Proton as a Charge Carrier

Quantitative Chemistry in Electrolyte Solvation Design for Aqueous Batteries

Contact Info

Product

Resources

About

Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy

Measuring the Pseudocapacitive Behavior of Individual V₂O₅ Particles by Scanning Electrochemical Cell Microscopy