Tin dioxide-doped ST-base energy storage material and preparation method thereof

A technology of tin dioxide and energy storage materials, applied in electrical components, fixed capacitor dielectrics, circuits, etc., can solve the problem that the energy storage density has not been significantly improved, and achieve miniaturization, low material cost, and simple preparation process Effect

Inactive Publication Date: 2018-06-05
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy storage density

Method used

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  • Tin dioxide-doped ST-base energy storage material and preparation method thereof
  • Tin dioxide-doped ST-base energy storage material and preparation method thereof
  • Tin dioxide-doped ST-base energy storage material and preparation method thereof

Examples

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Example Embodiment

[0030] A preparation method of tin dioxide doped ST-based energy storage material includes the following steps:

[0031] Step 1: Preparation of pure phase SrTiO 3 , Na 0.5 Bi 0.5 TiO 3 And pure phase BaTiO 3 spare. Weigh SrCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture A; weigh Bi according to the molar ratio of 1:1:4 2 O 3 , Na 2 CO 3 And TiO 2 Mix to form mixture B; weigh BaCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture C. SrCO 3 , Bi 2 O 3 , Na 2 CO 3 , BaCO 3 And TiO 2 The purity is 99.0% or more. Step 2: Take the mixture A, B, C powder and zircon and deionized water respectively, according to the mass ratio of 1:2:(0.8~1), 1:2:(1.7~2), 1:(1.9) ~2.0): (1~1.2) After mixing, use planetary ball mill to ball mill for 22~24h, then dry at 85~90℃ for 20~24h, after briquetting, put in a box furnace at 1120~1150℃ for heat preservation 3.5 to 4 hours, 840 to 880°C for 3 to 4 hours, 1150 to 1200°C for 3.5 to 4 hours to form SrTiO 3 , Na ...

Example Embodiment

[0045] Example 1

[0046] This invention is a new type of SnO 2 Doped SrTiO 3 Based ceramic energy storage material, the formula is (1-x)(0.45SrTiO 3 -0.2Na 0.5 Bi 0.5 TiO 3 -0.35BaTiO 3 )-xSnO 2 , Where x=0.01.

[0047] Step 1: Preparation of pure phase SrTiO 3 , Na 0.5 Bi 0.5 TiO 3 And pure phase BaTiO 3 spare. Weigh SrCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture A; weigh Bi according to the molar ratio of 1:1:4 2 O 3 , Na 2 CO 3 And TiO 2 Mix to form mixture B; weigh BaCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture C. SrCO 3 , Bi 2 O 3 , Na 2 CO 3 , BaCO 3 And TiO 2 The purity is 99.0% or more.

[0048] Step 2: Take the mixture A, B, C powder and zircon ball and deionized water respectively, according to the mass ratio of 1:2:1, 1:2:2, 1:2.0:1.2 after mixing, using planetary ball mill After ball milling for 24 hours, drying at 90°C for 24 hours and briquetting, it is placed in a box furnace at 1150°C for 4 hours, 880°C for 4 hour...

Example Embodiment

[0053] Example 2

[0054] This invention is a new type of SnO 2 Doped SrTiO 3 Based ceramic energy storage materials, the formula is 0.97(0.45SrTiO 3 -0.2Na 0.5 Bi 0.5 TiO 3 -0.35BaTiO 3 )-0.03SnO 2 , Where x=0.03.

[0055] Step 1: Preparation of pure phase SrTiO 3 , Na 0.5 Bi 0.5 TiO 3 And pure phase BaTiO 3 spare. Weigh SrCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture A; weigh Bi according to the molar ratio of 1:1:4 2 O 3 , Na 2 CO 3 And TiO 2 Mix to form mixture B; weigh BaCO according to the molar ratio of 1:1 3 And TiO 2 Mix to form mixture C. SrCO 3 , Bi 2 O 3 , Na 2 CO 3 , BaCO 3 And TiO 2 The purity is 99.0% or more.

[0056] Step 2: Take the mixture A, B, C powder and zircon ball and deionized water respectively, according to the mass ratio of 1:2:0.9, 1:2:1, 1:2:1.1 after mixing, using planetary ball mill After ball milling for 23 hours, drying at 88°C for 23 hours and briquetting, it is placed in a box furnace at 1140°C for 4 hours, 860°C for 3.5...

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Abstract

The invention discloses a tin dioxide-doped ST-base energy storage material and a preparation method thereof. The preparation method comprises the following steps: firstly, respectively weighing the raw materials with corresponding masses in molar ratio to obtain a mixture, carrying out ball milling, drying and briquetting on the mixture to form a full ingredient, and sequentially carrying out granulation and sieving on the full ingredient, so as to obtain a granulated material; secondly, pressing the granulated material into a sample, and sintering the prepared sample, so as to obtain a sintered sample; and finally, polishing and cleaning the sintered sample, uniformly coating the front and rear surfaces of the polished and cleaned sample with silver electrode slurry, and sintering the sample coated with the electrode slurry, so as to obtain the tin dioxide-doped ST-base energy storage material. The energy storage material prepared by virtue of the preparation method has high breakdown field strength and energy storage density, meanwhile, a preparation process is simple, low in material cost and environment-friendly, and the energy storage material is an important candidate material with technical and economic benefits for replacing a lead-base ceramic material to be used as a high-end industrial application material.

Description

technical field [0001] The invention relates to the field of ceramic capacitor materials, in particular to a tin dioxide-doped ST-based energy storage material and a preparation method thereof. Background technique [0002] Due to its fast charging speed and large charge and discharge times, the power density of dielectric capacitors is higher than that of other energy storage devices (such as: fuel cells, batteries and supercapacitors, etc.) and is widely used in mobile electronics, electric vehicles and pulse power technology. widely used. Although ceramic dielectric capacitors have high dielectric constant, low dielectric loss, low dielectric temperature coefficient, and excellent mechanical and thermal properties, the storage density of bulk materials is much lower than that due to their low breakdown strength (DBS) limitation. Thin / thick film energy storage materials. However, the cost of thin / thick film energy storage materials is too high for industrial mass product...

Claims

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Application Information

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IPC IPC(8): C04B35/47C04B41/88C04B35/64H01G4/12
CPCC04B35/47C04B35/64C04B41/5116C04B41/88C04B2235/3201C04B2235/3215C04B2235/3293C04B2235/3298C04B2235/6562C04B2235/6565H01G4/1209C04B41/0072
Inventor 蒲永平崔晨薇
Owner SHAANXI UNIV OF SCI & TECH
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