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A nanoporous lithium titanate nitride nanowire/nanomembrane integrated material and its preparation method and application

A lithium titanate nitride, nanoporous technology, applied in nanotechnology, nanotechnology, hybrid/electric double-layer capacitor manufacturing, etc. Low, improved electrical conductivity, the effect of improving electron transport and ion transfer efficiency

Active Publication Date: 2018-02-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the conductivity of nitrogen-doped lithium titanate materials and carbon-coated lithium titanate materials in the prior art has been improved to a certain extent, but the effect is still not ideal, and the conventional powder or granular structure of titanate Lithium electrode materials have the problem of low tap density

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  • A nanoporous lithium titanate nitride nanowire/nanomembrane integrated material and its preparation method and application
  • A nanoporous lithium titanate nitride nanowire/nanomembrane integrated material and its preparation method and application
  • A nanoporous lithium titanate nitride nanowire/nanomembrane integrated material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation method: (for the process flow chart, see the appended figure 2 )

[0036] (1) Preparation of sodium titanate nanowire / nanofilm material by hydrothermal reaction method: put the metal titanium sheet into a sodium hydroxide solution of a certain concentration, perform hydrothermal reaction at a certain temperature, and first form a lithium titanate nanofilm, A lithium titanate nanowire array is then formed to prepare a sodium titanate nanowire / nano film material grown in situ on the titanium sheet.

[0037] (2) Preparation of amorphous phase lithium titanate nanowire / nanofilm material by ion exchange method: put sodium titanate nanowire / nanofilm material into a certain concentration of hydrochloric acid solution, and perform hydrogen ion exchange reaction for sodium ion at a certain temperature , to prepare titanate nanowire / nano-membrane material; then put titanate nano-wire / nano-membrane material into lithium hydroxide solution with a certain concentration...

Embodiment 2

[0049] Preparation method: (for the process flow chart, see the appended figure 2 )

[0050] (1) Preparation of sodium titanate nanowire / nanofilm material by hydrothermal reaction method: put the metal titanium sheet into a sodium hydroxide solution of a certain concentration, perform hydrothermal reaction at a certain temperature, and first form a lithium titanate nanofilm, A lithium titanate nanowire array is then formed to prepare a sodium titanate nanowire / nano film material grown in situ on the titanium sheet.

[0051] (2) Preparation of amorphous phase lithium titanate nanowire / nanofilm material by ion exchange method: put sodium titanate nanowire / nanofilm material into a certain concentration of hydrochloric acid solution, and perform hydrogen ion exchange reaction for sodium ion at a certain temperature , to prepare titanate nanowire / nano-membrane material; then put titanate nano-wire / nano-membrane material into lithium hydroxide solution with a certain concentration...

Embodiment 3

[0063] Preparation method: (for the process flow chart, see the appended figure 2 )

[0064] (1) Preparation of sodium titanate nanowire / nanofilm material by hydrothermal reaction method: put the metal titanium sheet into a sodium hydroxide solution of a certain concentration, perform hydrothermal reaction at a certain temperature, and first form a lithium titanate nanofilm, A lithium titanate nanowire array is then formed to prepare a sodium titanate nanowire / nano film material grown in situ on the titanium sheet.

[0065] (2) Preparation of amorphous phase lithium titanate nanowire / nanofilm material by ion exchange method: put sodium titanate nanowire / nanofilm material into a certain concentration of hydrochloric acid solution, and perform hydrogen ion exchange reaction for sodium ion at a certain temperature , to prepare titanate nanowire / nano-membrane material; then put titanate nano-wire / nano-membrane material into lithium hydroxide solution with a certain concentration...

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Abstract

The invention discloses a lithium titanate nitride nanowire / nanomembrane integrated material with a nanoporous structure, comprising a lithium titanate nitride nanowire array and a lithium titanate nitride nanomembrane substrate; the titanium nitride The lithium titanate nanowire array is vertically grown on the lithium titanate nanofilm substrate, and the lithium titanate nanowires and the nanofilm are vertically connected to each other to form an electroactive material with an integrated overall structure; the lithium titanate nitride nanometer The line array has an ordered nano-array structure, the lithium titanate nano film substrate has a uniform planar film structure, and the lithium titanate nano wire surface has a uniformly distributed nano porous structure. The invention also discloses the preparation method and application of the material. Compared with the prior art, the material obtained in the present invention further improves the conductivity and specific capacitance of the material, overcomes the problem of low tap density of lithium titanate electrode materials with conventional powder or granular structures, and has good mechanical properties. performance.

Description

technical field [0001] The invention relates to a lithium titanate nitride nanowire / nanomembrane integrated material with a nanoporous structure, a preparation method and application thereof, and belongs to the technical field of electrochemical new energy and new materials. Background technique [0002] The energy issue is one of the most important issues in the world. Primary energy sources such as oil, natural gas, and coal are limited resources. During the combustion of oil, coal, and other resources, a large amount of carbon dioxide, sulfur dioxide, and dust will be generated, which is harmful to the environment. It has also caused great harm, and the total amount of these resources is constantly decreasing. With the increase of the world's population and the continuous economic development, the demand for energy will continue to increase, and it is of great significance to develop new energy sources that are clean, green, and highly energy-storage efficient. It is aga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/50H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 谢一兵宋飞
Owner SOUTHEAST UNIV
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