Ultra-long Na2V6O16·xH2O nanowires: large-scale synthesis and application in binder-free flexible cathodes for lithium ion batteries

Zhang, Weidong; Xu, Guobao; Yang, Liwen; Ding, Jianwen

doi:10.1039/c5ra22711a

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…In a monoclinic NVO system, the V 3 O 8 layer is composed of VO 6 octahedra and edge-sharing V 2 O 8 square pyramid units with hydrated Na ions situated among the layers . Moreover, sodium vanadates, owing to their typical layered structure and structural flexibility, have served as a guest species to store Li + and Na + ions with good electrochemical properties and became a ubiquitous electrode material for LIBs and SIBs. , It is considered that Na + in Na 2 V 6 O 16 ·2.36H 2 O is situated at the octahedral sites between the layers of vanadium and oxygen atoms. The vacant tetrahedral sites are available for occupation by Li ions .…”

Section: Resultsmentioning

confidence: 99%

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

et al. 2018

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Owing to their safety and low cost, aqueous rechargeable Zn-ion batteries (ARZIBs) are currently more feasible for grid-scale applications, as compared to their alkali counterparts such as lithium- and sodium-ion batteries (LIBs and SIBs), for both aqueous and nonaqueous systems. However, the materials used in ARZIBs have a poor rate capability and inadequate cycle lifespan, serving as a major handicap for long-term storage applications. Here, we report vanadium-based Na2V6O16·3H2O nanorods employed as a positive electrode for ARZIBs, which display superior electrochemical Zn storage properties. A reversible Zn2+-ion (de)intercalation reaction describing the storage mechanism is revealed using the in situ synchrotron X-ray diffraction technique. This cathode material delivers a very high rate capability and high capacity retention of more than 80% over 1000 cycles, at a current rate of 40C (1C = 361 mA g–1). The battery offers a specific energy of 90 W h kg–1 at a specific power of 15.8 KW kg–1, enlightening the material advantages for an eco-friendly atmosphere.

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Section: Resultsmentioning

confidence: 99%

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

et al. 2018

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“…As shown in Figure 2d, the peak of V 2p can be divided into V 4þ characteristic peaks at 516.18 and 523.96 eV and V 5þ characteristic peaks at 517.59 and 526.26 eV, indicating that the V in NaV 6 O 15 exists in two valence states: V 4þ and V 5þ . [21][22][23] The different chemical valence states V xþ (x ¼ 3,4,5) can promote the diffusion kinetics of Zn 2þ , thereby increasing the specific capacity of the battery. [24] The prepared NaV 6 O 15 nanosheets are expected to have better electrochemical performance.…”

Section: Resultsmentioning

confidence: 99%

Preparation of NaV₆O₁₅ Nanosheet Cathodes with High Cycling Performance and Good Capacity Retention Rate in Aqueous Zinc‐Ion Batteries

Yan

Ren

Yang

et al. 2022

Physica Status Solidi (a)

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Aqueous zinc‐ion batteries (AZIBs) have become a promising alternative energy storage device due to their lower cost and better safety performance than lithium‐ion batteries (LIBs). However, the biggest challenge is the need to develop electrode materials with higher capacity and longer life than LIBs at present. Herein this work, a tunnel‐structured sodium vanadate (NaV6O15) is synthesized by molten salt method as the cathode materials for AZIBs. The prepared NaV6O15 nanosheets have a high specific capacity of 325 mAh g−1 at a current density of 0.1 A g−1, and the capacity retention rate is as high as 127.08% under 1000 cycling at a current density of 1 A g−1. This excellent performance is mainly attributed to the stable tunneled structure, which provides an effective diffusion path for Zn2+ insertion and avoids structural damage. Herein the subsequent cycles, Zn2+ is mainly inserted/extracted in NaV6O15 and Zn3(OH)2V2O7·2H2O. The preparation of NaV6O15 cathode materials and the molten salt method provide a certain reference value for the development of AZIBs in this work.

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“…can fabricate into the graphene sheets [148]. When CNTs as additive are assembled into the nanosheets, the restacking of the nanosheets can be prevented, and the conductivity of ion and electron can be greatly increased [149]. The electrode chemical properties can be enhanced by coating or mixing active materials on other conductive materials and then assembling into 3D functional materials [150][151][152].…”

Section: Vacuum Filtrationmentioning

confidence: 99%

Binder-Free Electrodes and Their Application for Li-Ion Batteries

Kang¹,

Deng

Chen³

et al. 2020

Nanoscale Res Lett

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Lithium-ion batteries (LIB) as energy supply and storage systems have been widely used in electronics, electric vehicles, and utility grids. However, there is an increasing demand to enhance the energy density of LIB. Therefore, the development of new electrode materials with high energy density becomes significant. Although many novel materials have been discovered, issues remain as (1) the weak interaction and interface problem between the binder and the active material (metal oxide, Si, Li, S, etc.), (2) large volume change, (3) low ion/electron conductivity, and (4) selfaggregation of active materials during charge and discharge processes. Currently, the binder-free electrode serves as a promising candidate to address the issues above. Firstly, the interface problem of the binder and active materials can be solved by fixing the active material directly to the conductive substrate. Secondly, the large volume expansion of active materials can be accommodated by the porosity of the binder-free electrode. Thirdly, the ion and electron conductivity can be enhanced by the close contact between the conductive substrate and the active material. Therefore, the binderfree electrode generally exhibits excellent electrochemical performances. The traditional manufacture process contains electrochemically inactive binders and conductive materials, which reduces the specific capacity and energy density of the active materials. When the binder and the conductive material are eliminated, the energy density of the battery can be largely improved. This review presents the preparation, application, and outlook of binder-free electrodes. First, different conductive substrates are introduced, which serve as carriers for the active materials. It is followed by the binderfree electrode fabrication method from the perspectives of chemistry, physics, and electricity. Subsequently, the application of the binder-free electrode in the field of the flexible battery is presented. Finally, the outlook in terms of these processing methods and the applications are provided.

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Ultra-long Na₂V₆O₁₆·xH₂O nanowires: large-scale synthesis and application in binder-free flexible cathodes for lithium ion batteries

Abstract: Large-scale synthesis and application of ultra-long Na2V6O16·xH2O nanowires as binder-free flexible cathodes for high performance LIBs are demonstrated.

Cited by 18 publications

References 32 publications

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Preparation of NaV₆O₁₅ Nanosheet Cathodes with High Cycling Performance and Good Capacity Retention Rate in Aqueous Zinc‐Ion Batteries

Binder-Free Electrodes and Their Application for Li-Ion Batteries

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Ultra-long Na2V6O16·xH2O nanowires: large-scale synthesis and application in binder-free flexible cathodes for lithium ion batteries

Abstract: Large-scale synthesis and application of ultra-long Na2V6O16·xH2O nanowires as binder-free flexible cathodes for high performance LIBs are demonstrated.

Cited by 18 publications

References 32 publications

Na2V6O16·3H2O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Na2V6O16·3H2O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Preparation of NaV6O15 Nanosheet Cathodes with High Cycling Performance and Good Capacity Retention Rate in Aqueous Zinc‐Ion Batteries

Binder-Free Electrodes and Their Application for Li-Ion Batteries

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Ultra-long Na₂V₆O₁₆·xH₂O nanowires: large-scale synthesis and application in binder-free flexible cathodes for lithium ion batteries

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Na₂V₆O₁₆·3H₂O Barnesite Nanorod: An Open Door to Display a Stable and High Energy for Aqueous Rechargeable Zn-Ion Batteries as Cathodes

Preparation of NaV₆O₁₅ Nanosheet Cathodes with High Cycling Performance and Good Capacity Retention Rate in Aqueous Zinc‐Ion Batteries