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Titanium suboxide electrode sheet and preparation method and application thereof

A technology of titanium dioxide and electrode sheets, which is applied in the field of ceramic electrodes, can solve the problems of high conductivity, corrosion resistance, poor processability, and difficult compactness of titanium dioxide electrodes, so as to improve the overall quality, improve compactness, The effect of enhancing electrical conductivity

Inactive Publication Date: 2019-04-26
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As far as the preparation technology of the existing titanium oxide electrode plate is concerned, the titanium oxide powder used or the in-situ synthesis of titanium oxide is made of a series of titanium oxides (such as TiO, T 3 o 5 , Ti 4 o 7 , Ti 5 o 9 , Ti 6 o 11 , Ti 7 o 14 , Ti 8 o 15 or Ti 9 o 17 ), it is difficult to maintain high conductivity and corrosion resistance for titanium suboxide electrodes composed of various titanium oxides
It is well known that different titanium oxides have different electrical conductivity, corrosion resistance and electrochemical window, among which Ti 4 o 7 The electrical conductivity is the best, but using titanium dioxide powder as raw material, it is difficult to obtain a sheet or block material with good compactness and high electrical conductivity through the existing preparation technology. In practical application, there is poor toughness, and post-processing gender issues

Method used

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  • Titanium suboxide electrode sheet and preparation method and application thereof
  • Titanium suboxide electrode sheet and preparation method and application thereof
  • Titanium suboxide electrode sheet and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] This embodiment prepares titanium oxide electrode sheet according to the following method:

[0058] (1) Ball milling: Ti 4 o 7 Titanium suboxide powder with a content of 90% is ball milled under an argon atmosphere, and then sieved to obtain a titanium suboxide fine powder with a particle size not greater than 40 microns;

[0059] (2) Preforming: the above titanium oxide fine powder (Ti 4 o 7 Content is 90%) and binder PI is mixed evenly and loaded into graphite mould, the add-on of described binder PI is 2wt% of titanium oxide weight, then graphite mold is placed in spark plasma sintering furnace, vacuumizes to The vacuum degree is 9.5Pa and the pressure of 10MPa is applied to preform the mixed powder;

[0060] (3) Sintering: heat up to a sintering temperature of 900°C under the condition of maintaining argon, perform constant temperature and constant pressure discharge plasma sintering for 30 minutes, then turn off the heating power supply, and take out the titani...

Embodiment 2

[0065] This embodiment prepares titanium oxide electrode sheet according to the following method:

[0066] (1) Ball milling: Ti 4 o 7 Titanium oxide powder with a content of 99% is ball milled under vacuum conditions, and then sieved to obtain titanium oxide fine powder with a particle size not greater than 38 microns;

[0067] (2) Preforming: the above titanium oxide fine powder (Ti 4 o 7 content is 99%) mixed with binder PE+PP and loaded into graphite mold evenly, the addition of the binder PE+PP is 20wt% of the weight of titanium dioxide, the ratio of PE and PP is 1:1, Then place the graphite mold in a spark plasma sintering furnace, evacuate to a vacuum of 8Pa and apply a pressure of 60MPa to preform the mixed powder;

[0068] (3) Sintering: heat up to the sintering temperature of 1600°C under the condition of maintaining argon, conduct constant temperature and constant pressure discharge plasma sintering for 15 minutes, then turn off the heating power supply, and take...

Embodiment 3

[0073] This embodiment prepares titanium oxide electrode sheet according to the following method:

[0074] (1) Ball milling: Ti 4 o 7 Titanium suboxide powder with a content of 93% is ball milled under an argon atmosphere, and then sieved to obtain a titanium suboxide fine powder with a particle size not greater than 30 microns;

[0075] (2) Preforming: the above titanium oxide fine powder (Ti 4 o 7 Content is 93%) and binder PVB is mixed uniformly and packed into graphite mould, and the add-on of described binder PVB is 5wt% of titanium oxide weight, then graphite mold is placed in spark plasma sintering furnace, vacuumizes to The vacuum degree is 9Pa and the pressure of 100MPa is applied to preform the mixed powder;

[0076] (3) Sintering: heat up to a sintering temperature of 1200°C under the condition of maintaining argon, perform constant temperature and constant voltage discharge plasma sintering for 5 minutes, then turn off the heating power supply, and take out the...

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Abstract

The invention provides a titanium suboxide electrode sheet and a preparation method and application thereof. The preparation method comprises the following steps: (1) vacuumizing titanium suboxide fine powder and applying pressure to carry out preforming to obtain a preformed product; and (2) performing discharge plasma sintering on the preformed product in step (1) to obtain the titanium suboxideelectrode sheet. According to the preparation method provided by the invention, the titanium suboxide with high Ti4O7 content is matched with the discharge plasma sintering, so that the conductivityand the corrosion resistance of the titanium suboxide electrode sheet are effectively improved, the service life of an electrode is prolonged, the compactness of the prepared titanium suboxide electrode sheet is improved, and the toughness and the post-processing property of the titanium dioxide electrode sheet are improved. According to the preparation method provided by the invention, a binder and the titanium dioxide fine powder are uniformly mixed, the defects of the electrode sheet can be reduced through pre-pressing forming, and the performance of the titanium suboxide electrode sheet isimproved.

Description

technical field [0001] The invention belongs to the technical field of ceramic electrodes and relates to titanium dioxide, in particular to a titanium dioxide electrode sheet and its preparation method and application. Background technique [0002] Titanium oxide (Ti n o 2n-1 ) has unique physical, chemical and electrochemical properties, including excellent electrical conductivity, strong chemical stability, corrosion resistance and wide electrochemical stable potential window. Based on the characteristics of titanium dioxide in terms of physical, chemical and electrochemical properties, titanium dioxide is gradually used to prepare various forms of electrodes, and is used in batteries and wastewater treatment and other fields. [0003] In order to realize the application of titanium dioxide in electrodes, various utilization approaches and preparation methods have been formed. One is to form titanium dioxide into a composite electrode material with high conductivity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/622
CPCC04B35/46C04B35/622C04B2235/658C04B2235/666
Inventor 肖清贵张绘李海涛齐涛刘艳尼牛军峰
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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