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Na-doped NH4V4O10 nanosheet material as well as preparation method and application thereof

A technology of NH4V4O10 and nanosheets, which is applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, and can solve the problems of low specific capacity of vanadate materials

Active Publication Date: 2020-10-27
HUNAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to synthesize a Na-doped NH with a higher specific capacity for the defects of low specific capacity of existing vanadate materials. 4 V 4 o 10 nanosheet material

Method used

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  • Na-doped NH4V4O10 nanosheet material as well as preparation method and application thereof
  • Na-doped NH4V4O10 nanosheet material as well as preparation method and application thereof
  • Na-doped NH4V4O10 nanosheet material as well as preparation method and application thereof

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Embodiment Construction

[0029] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the examples, and the contents mentioned in the examples are not intended to limit the present invention. It should be noted in advance that the following examples were completed in a laboratory, and those skilled in the art should understand that the amounts of each component given in the examples only represent the proportioning relationship between the components, rather than specific limited.

[0030] 1. Preparation of the target product.

[0031] Na in this example x NH 4 V 4 o 10 The preparation method of nano sheet material is as follows:

[0032] a. Add appropriate amount of NH 4 VO 3 Add appropriate amount of NaNO 3 solution, stir and mix well; specifically, NH 4 VO 3 with NaNO 3 NaNO in solution 3 The mass ratio of 2:1-3.5:1, for example, can first use 0.21 g NaNO 3 Add 30 ml deionized water to prepare NaN...

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Abstract

The invention discloses a Na-doped NH4V4O10 nanosheet material as well as a preparation method and application thereof, and relates to the technical field of zinc ion battery electrode materials. TheNaxNH4V4O10 nanosheet material is prepared in a one-step hydrothermal assembly mode, and inserted NH4 < + > can be used as a 'strut' between vanadium oxide layers to prevent destructive structural change in an ion insertion / extraction process; an N-H-O bond network between NH4 < + > and the vanadium oxide layer increases the structural stability, and the cycling stability of an electrode materialtaking the NaxNH4V4O10 nanosheet material as an active substance is greatly improved. Overall, the ultra-thin nano active material shows excellent electrochemical performance; due to the two-dimensional nanosheet form and the adjustable large interlayer spacing, the material has good Zn < 2 + > storage capacity and ultrafast kinetic characteristics of ion intercalation / deintercalation, and the NH4V4O10 nanosheet material has high specific capacity, good rate capability and cycling stability and wide application prospect.

Description

technical field [0001] The invention relates to the technical field of zinc ion battery electrode materials, in particular to a Na-doped NH 4 V 4 o 10 Nanosheet materials and their preparation methods and applications. Background technique [0002] Theoretically, secondary aqueous zinc-ion batteries have the advantages of safety, cheapness, environmental protection, and high energy density. High-energy-density secondary aqueous zinc-ion batteries (ZIBs) are expected to meet the growing demand for safe and sustainable energy storage devices in the future. However, an important challenge currently hindering the practical application of aqueous Zn-ion batteries is the lack of suitable cathode materials. In recent years, MnO 2 Because of its high theoretical capacity (300 mAh g -1 ), low cost and low toxicity have attracted more and more attention. However, MnO 2 In the continuous insertion of Zn 2+ undergo complex phase transitions and show limited specific capacity or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/48H01M10/36Y02E60/10
Inventor 张睿智黄靖栋尹岚董勇
Owner HUNAN INST OF TECH
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