a na-doped nh 4 v 4 o 10 Nano sheet material and its preparation method and application

A technology of NH4V4O10 and nanomaterials, 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: 2021-11-02
HUNAN INST OF TECH
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  • 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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  • a na-doped nh <sub>4</sub> v <sub>4</sub> o <sub>10</sub> Nano sheet material and its preparation method and application
  • a na-doped nh <sub>4</sub> v <sub>4</sub> o <sub>10</sub> Nano sheet material and its preparation method and application
  • a na-doped nh <sub>4</sub> v <sub>4</sub> o <sub>10</sub> Nano sheet material and its preparation method and application

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[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

A Na-doped NH 4 V 4 o 10 The nano sheet material and its preparation method and application relate to the technical field of zinc ion battery electrode materials. The present invention prepares Na x NH 4 V 4 o 10 nanosheet material, in which the intercalated NH 4 + Can act as a "pillar" between vanadium oxide layers, preventing destructive structural changes during ion intercalation / extraction; NH 4 + and the N‑H‑O bond network between the vanadium oxide layer increases the structural stability, greatly improving the above-mentioned Na x NH 4 V 4 o 10 Cyclic stability of electrode materials where nanosheet materials are active materials. Overall, the ultrathin nano-active material exhibits excellent electrochemical performance, and the material has good Zn 2+ Storage capacity and ultrafast kinetics of ion intercalation / extraction, the aforementioned NH 4 V 4 o 10 Nanosheet materials have high specific capacity, good rate performance and cycle stability, and have broad application prospects.

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 Patents(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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