Binder-free V<sub>2</sub>O<sub>5</sub>/CNT paper electrode for high rate performance zinc ion battery

Yin, Bing; Zhang, Siwen; Ke, Ke; Xiong, Tao; Wang, Yinming; Lim, David Boon Kiang; Lee, Wee Siang Vincent; Wang, Zhenbo; Xue, Junmin

doi:10.1039/c9nr07458a

Cited by 82 publications

(43 citation statements)

References 30 publications

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“…After the third repetition, when the current density was rapidly decreased to 50 mA g −1 (the fourth repetition), the average discharge capacity slightly dropped to 157 mA g -1 , but the % capacity retention was still~97.5% indicating a very stable cathode material. In comparison to other studies that utilize V 2 O 5 as a cathode material, the obtained capacity falls short in a specific capacity [7,23,31,39]. However, in calculating the capacity of the battery, the active material is not the only weight being considered.…”

Section: Electrochemical Performance Of Bcs-vonfmentioning

confidence: 89%

“…Among various vanadium-based oxides, anhydrous vanadium pentoxide (V 2 O 5 ) holds great potential as a cathode material for AZBs, due to its high theoretical capacity, i.e., 589 mA h g −1 , which is based on the two-electron redox center (vanadium). However, according to Yin et al [31], the magnitude of the sluggish diffusion in a material is greatly increased in the presence of an organic binder. Zn 2+ possesses a higher charge density that can pose a polarizing effect on the material upon the diffusion process.…”

Section: Introductionmentioning

confidence: 99%

“…Also, polymeric binders increase processing and material costs due to the additional time needed to incorporate binders. Further, it is evident that PVDF utilizes a toxic solvent, N-methyl-2-pyrrolidone (NMP), which is not desirable [31][32][33][34]. Huang et al [32] utilized a binder-free MnO 2 /rGO electrode as cathode material for AZBs.…”

Section: Introductionmentioning

confidence: 99%

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Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

et al. 2019

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Recently, rechargeable aqueous zinc-ion batteries (AZBs) have attracted extensive interest due to their safety, abundance, low cost, and low toxicity. However, aqueous electrolytes require a polymeric binder to prevent dissolution of the active material in addition to its binding properties. This study highlights binder-free, centimeter long, single-crystal, V2O5 nanofibers (BCS-VONF) on carbon cloth, as the cathode material for AZBs synthesized via a simple one-step hydrothermal process. BCS-VONF in 3.0 M Zn(OTf)2 exhibit promising electrochemical performance with excellent capacity retention. Even in the absence of a binder, BCS-VONF were found to be very stable in 3.0 M Zn(OTf)2. They will not yield to the dissolution and detachment of the active material on the current collector. The novel strategy described in this study is an essential step for the development of BCS-VONF on carbon cloth, as a promising cathode material for AZBs.

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Section: Electrochemical Performance Of Bcs-vonfmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

et al. 2019

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“…Especially, the insertion kinetics suffer from a bottleneck in cost‐saving ZnSO 4 electrolyte due to the larger solvation sheath and charge density of Zn 2+ compared with Zn (CF 3 SO 3 ) 2 electrolyte, so it is pressing to explore suitable charge storage mechanisms for further tapping the economic application potential of ZIBs. [ 11 ]…”

Section: Methodsmentioning

confidence: 99%

“…DOI: 10.1002/adma.201908420 electrolyte, so it is pressing to explore suitable charge storage mechanisms for further tapping the economic application potential of ZIBs. [11] Pseudocapacitor-type storage mechanisms are an effective option to integrate the advantages with fast power output, analogous to electrical-double-layer capacity (EDLC), and durable capacities storage from faradaic reactions. There are many reports based on the surface-controlled capacitive process as high-performance Zn-ion battery cathodes, such as Zn 3 [12][13][14] However, there is still a lot to be improved to further optimize the performance.…”

mentioning

confidence: 99%

Intercalation Pseudocapacitive Zn²⁺ Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance

et al. 2020

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The weak van der Waals interactions enable ion‐intercalation‐type hosts to be ideal pseudocapacitive materials for energy storage. Here, a methodology for the preparation of hydrated vanadium dioxide nanoribbon (HVO) with moderate transport pathways is proposed. Out of the ordinary, the intercalation pseudocapacitive reaction mechanism is discovered for HVO, which powers high‐rate capacitive charge storage compared with the battery‐type intercalation reaction. The main factor is that the defective crystalline structure provides suitable ambient spacing for rapidly accommodating and transporting cations. As a result, the HVO delivers a fast Zn2+ ion diffusion coefficient and a low Zn2+ diffusion barrier. The electrochemical results with intercalation pseudocapacitance demonstrate a high reversible capacity of 396 mAh g−1 at 0.05 A g−1, and even maintain 88 mAh g−1 at a high current density of 50 A g−1.

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Additive‐Free Ultrastable Hydrated Vanadium Oxide Sol/Carbon Nanotube Ink for Durable and High‐Power Aqueous Zinc‐Ion Battery

Jin

Gao

et al. 2022

Adv Materials Inter

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The reversible storage of Zn ions in aqueous electrolyte typically follows the intercalation mechanism. [22][23][24][25][26][27][28][29][30][31][32] Though the radius of Zn 2+ is only 0.074 nm, its bivalency and large solvation sheath generally cause sluggish insertion kinetics. [33][34][35][36][37][38][39] Therefore, materials with tunnel structure or 2D channels could facilitate the Zn ion insertion/extraction, and thus serving as suitable cathode materials for zinc-ion batteries (ZIBs).Vanadium-based materials (e.g., V 2 O 5 •nH 2 O, [40] LiV 3 O 8 , [41] Na 2 V 6 O 16 •n-H 2 O [42] ) are attractive cathode materials for ZIBs since the multiple chemical valence of vanadium from +5 to +3 can result in a high specific capacity of ≈400 mA h g −1 . [43,44] Especially, hydrated vanadium pentoxide (V 2 O 5 •nH 2 O) has a layered structure with a large interlayer spacing of 1.2 nm that allows facile accessibility of Zn ions. ZIBs are advantageous to conventional Li-ion batteries not only in the safety and cost, but also in their significantly higher power densities since the aqueous electrolytes own a several orders of magnitude higher ion diffusion rate than the organic counterparts. [45] However, the intrinsically low electrical conductivity and unstable structure of V 2 O 5 •nH 2 O usually cause a fast decline in capacity under high rates or charge/discharge cycling. To address these challenges, constructing free-standing films incorporating V 2 O 5 •nH 2 O and conductive materials such as graphene or CNTs with improved ionic and electronic transport could be an effective way. [46,47] At present, electrochemical deposition, [48] vacuum filtration, [34] and atomic layer deposition [49] are usually used to prepare V 2 O 5 /carbon films. However, these tedious and discontinuous processes make them difficult to scale up. Blading coating is a solution-processable technology to construct large-area film that requires well-dispersed ink and suitable mechanical properties of the functional materials. Typically, neutral surfactants are introduced for the preparation of V 2 O 5 /carbon hybrid inks since V 2 O 5 is dissolvable in both acidic and alkaline solutions. [50][51][52][53] However, these surfactants are difficult to remove and increase the electrode resistance, resulting in decreased rate performance. Until now, it is still challenging to fabricate a surfactant-free V 2 O 5 /carbon ink with excellent stability and ultrahigh concentration.Aqueous zinc-ion batteries (ZIBs) based on near-neutral electrolytes represent a promising large-scale energy storage solution for a deeper and broader penetration of clean renewable energy. The preparation of electrode paste is vital for the normal performance and stability of ZIBs. Herein, the authors report an additive-free V 2 O 5 •1.6H 2 O (h-V 2 O 5 )/carbon nanotube (CNT) hybrid ink to prepare large-scale free-standing h-V 2 O 5 /CNT film for high-rate and durable ZIBs. The as-prepared h-V 2 O 5 /CNT film exhibits a high specific capacity of 446.4 mA h g −1 (volumetric capaci...

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Binder-free V₂O₅/CNT paper electrode for high rate performance zinc ion battery

Abstract: This work reports a significant electrochemical performance enhancement (especially the rate performance and cycling stability) by adopting a freestanding V2O5/CNT composite paper (VCP) as the ZIB cathode.

Cited by 82 publications

References 30 publications

Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

Intercalation Pseudocapacitive Zn²⁺ Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance

Additive‐Free Ultrastable Hydrated Vanadium Oxide Sol/Carbon Nanotube Ink for Durable and High‐Power Aqueous Zinc‐Ion Battery

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Binder-free V2O5/CNT paper electrode for high rate performance zinc ion battery

Abstract: This work reports a significant electrochemical performance enhancement (especially the rate performance and cycling stability) by adopting a freestanding V2O5/CNT composite paper (VCP) as the ZIB cathode.

Cited by 82 publications

References 30 publications

Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

Intercalation Pseudocapacitive Zn2+ Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance

Additive‐Free Ultrastable Hydrated Vanadium Oxide Sol/Carbon Nanotube Ink for Durable and High‐Power Aqueous Zinc‐Ion Battery

Contact Info

Product

Resources

About

Binder-free V₂O₅/CNT paper electrode for high rate performance zinc ion battery

Intercalation Pseudocapacitive Zn²⁺ Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance