High energy storage density sodium strontium niobate based glass ceramic energy storage material and its preparation and application

A strontium niobate-based technology with high energy storage density, which is used in fixed capacitor components, electrical components, and fixed capacitor dielectrics, etc., can solve the problems that restrict the miniaturization and lightness of pulse devices, and achieve excellent breakdown resistance. Field strength performance, regular crystal phase structure, and the effect of improving density

Inactive Publication Date: 2018-07-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The energy storage density of existing materials has not yet made a significant breakthrough, and the volume of the energy storage device occupies a large part of the entire pulse device, which also greatly restricts the development of pulse devices to miniaturization and light weight

Method used

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  • High energy storage density sodium strontium niobate based glass ceramic energy storage material and its preparation and application
  • High energy storage density sodium strontium niobate based glass ceramic energy storage material and its preparation and application
  • High energy storage density sodium strontium niobate based glass ceramic energy storage material and its preparation and application

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Experimental program
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Effect test

Embodiment 1

[0030] A method for preparing a strontium sodium niobate-based glass-ceramic energy storage material with high energy storage density, the method comprising the following steps:

[0031] (1) SrCO with a purity greater than 99wt% 3 、Na 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above-mentioned components are 21%, 21%, 28% and 30%;

[0032] (2) The raw material ingredients are mixed by ball milling for 16 hours, dried, and melted at 1500°C for 3 hours to obtain a high-temperature melt;

[0033](3) Pouring the high-temperature melt obtained in step (2) into a metal mold, annealing for stress relief at 600° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.2 mm;

[0034] (4) The glass flakes prepared in step (3) were kept at 1000° C. for 3 hours for controlled crystallization to obtain a strontium sodium niobate-based glass-ceramic energy storage material with high energy storage density.

[0035] T...

Embodiment 2

[0037] (1) SrCO with a purity greater than 99wt% 3 、Na 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 29.4%, 12.6%, 28% and 30%, after mixing by ball milling for 16 hours, drying, and melting at 1500°C for 3 hours;

[0038] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 600° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.2 mm;

[0039] (3) The glass flakes prepared in step (2) were kept at 1000° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0040] The XRD of the sample that present embodiment makes is as figure 1 As shown, SEM as figure 2 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows Figure 4 As shown, the energy storage density is shown in Table 1.

Embodiment 3

[0042] (1) SrCO with a purity greater than 99wt% 3 、Na 2 CO 3 , Nb 2 o 5 and SiO 2 For raw material batching, the molar percentages of the above components are 33.4%, 8.4%, 28% and 30%, after ball milling for 16 hours, drying, and melting at 1500°C for 3 hours;

[0043] (2) Pouring the high-temperature melt obtained in step (1) into a metal mold, annealing for stress relief at 600° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of 0.9 to 1.2 mm;

[0044] (3) The glass flakes prepared in step (2) were kept at 1000° C. for 3 hours for controlled crystallization to obtain glass ceramics.

[0045] The XRD of the sample that present embodiment makes is as figure 1 As shown, SEM as figure 2 As shown, the dielectric properties are as image 3 As shown, the withstand voltage performance test is as follows Figure 4 As shown, the energy storage density is shown in Table 1.

[0046] In this embodiment, the breakdown field strength and energy storage ...

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Abstract

The invention relates to a high-energy-storage-density strontium-sodium-niobate-base glass ceramic energy storage material, and preparation and application thereof. The strontium-sodium-niobate-base glass ceramic energy storage material comprises SrO, Na2O, Nb2O5 and SiO2 in a mole ratio of 42x:42(1-x):28:30. The preparation method comprises the following steps: weighing the raw materials, mixing by ball milling, drying, and carrying out high-temperature melting to obtain a high-temperature melt; and casting the high-temperature melt into a preheated metal mold, carrying out stress-relief annealing to obtain transparent glass, cutting the transparent glass into glass sheets with the thickness of 0.9-1.2mm, and carrying out controlled crystallization to obtain the product. The product is applicable to an energy storage capacitor material. Compared with the prior art, the preparation method provided by the invention is simple, does not need complicated after-treatment steps, and is economical and practical. The prepared glass ceramic energy storage material has higher breakdown field strength resistance (2402kV / cm), and the energy storage density of the material is obviously enhanced to 16.86J / cm<3>. The strontium-sodium-niobate-base glass ceramic energy storage material is applicable to an energy storage capacitor material.

Description

technical field [0001] The invention relates to the field of dielectric energy storage materials, in particular to a strontium sodium niobate-based glass ceramic energy storage material with high energy storage density and its preparation and application. Background technique [0002] In recent years, pulse power technology has been widely used in national defense and modern industrial technology fields such as all-electric warships, electromagnetic rail gun weapons, hybrid electric vehicles, and controlled laser fusion. In pulse technology, capacitors are the preferred and important energy storage components for pulse power systems. Dielectric energy storage capacitors have higher and higher requirements in terms of high energy storage density, fast charge and discharge performance, and stability. Therefore, it is necessary to search for electrolyte materials with high energy storage density, so as to manufacture capacitors with high energy density and good performance. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02H01G4/12
CPCC03C10/00H01G4/1254H01G4/129
Inventor 王海涛翟继卫刘金花沈波
Owner TONGJI UNIV
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