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Lithium ion conductor with nanoscale and preparation method thereof

A nanoscale, lithium-ion technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as battery safety hazards, achieve low cost, widen diffusion network channels, and shorten diffusion paths Effect

Active Publication Date: 2014-04-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolyte of existing lithium-ion secondary batteries usually uses flammable liquid organic substances. When the size of the battery is further enlarged and the charge and discharge power is further increased, this type of electrolyte will bring many unpredictable safety hazards to the use of the battery.

Method used

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  • Lithium ion conductor with nanoscale and preparation method thereof
  • Lithium ion conductor with nanoscale and preparation method thereof
  • Lithium ion conductor with nanoscale and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 14

[0021] Example 14LiBH 4 -LiF, 4LiBH 4 -LiCl, 4LiBH 4 -LiBr, 4LiBH 4 - Preparation of LiBr

[0022] 4BH 4 -Preparation of solid solution phases such as LiF: LiBH with a purity of 95% 4 Mix it with LiF with a purity of 99% at a molar ratio of 4:1, and use a planetary wheel ball mill for mechanical ball milling. The ball-to-material ratio is 40:1, the ball milling time is 2 hours, and the revolution speed is 400rpm to obtain nano-sized particles. .

[0023] 4BH 4 -Preparation of LiCl solid solution phase: LiBH with a purity of 95% 4 Mix it with LiCl with a purity of 99% at a molar ratio of 4:1, and use a planetary wheel ball mill for mechanical ball milling. The ball-to-material ratio is 40:1, the ball milling time is 2 hours, and the revolution speed is 400rpm to obtain nano-sized particles. .

[0024] 4BH 4 -Preparation of LiBr solid solution phase: LiBH with a purity of 95% 4 Mix it with LiBr with a purity of 99% at a molar ratio of 4:1, and use a planetary wheel ba...

Embodiment 2

[0026] Example 2LiBH 4 / Preparation of SBA-15

[0027] In isolated air (H 2 O2 4 The mixture of the particles and the mesoporous silicon material SBA-15 was placed in a steel ball tank equipped with stainless steel grinding balls, the weight ratio of the grinding balls to the sample was 40:1, under the protection of high-purity (99.9999%) inert gas, using The planetary wheel ball mill was mechanically ball milled for 5 hours at a revolution speed of 400rpm, and the lithium ion conductor LiBH with nanoscale was prepared4 / SBA-15. Since the samples are easy to react with oxygen and water, all sample manipulations are carried out in a glove box filled with high-purity argon, and the oxygen and water contents in the glove box are lower than 1ppm.

[0028] Experimental detection of LiBH by X-ray diffraction (XRD) 4 / SBA-15. The sample cell is covered with a specific polymer film, and is sealed with the glass slide with vacuum grease to prevent the effect of water and oxygen in...

Embodiment 34

[0031] Example 34LiBH 4 - Preparation of LiI / SBA-15

[0032] In isolated air (H 2 O2 4 -The mixture of LiI particles and mesoporous silicon material SBA-15 is placed in a steel ball tank equipped with stainless steel grinding balls, the weight ratio of the grinding balls to the sample is 20:1, under the protection of high-purity (99.9999%) inert gas , using a planetary wheel ball mill for mechanical ball milling for 6h, with a revolution speed of 600rpm, to prepare a nanoscale lithium ion conductor 4LiBH 4 -LiI / SBA-15. Since the samples are easy to react with oxygen and water, all sample manipulations are carried out in a glove box filled with high-purity argon, and the oxygen and water contents in the glove box are lower than 1ppm.

[0033] XRD and transmission electron microscope figure are consistent with embodiment 2.

[0034] The change curve of conductivity with temperature is shown in Figure 4 , it can be seen from the figure that the nano-dispersed 4LiBH 4 -LiI / ...

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Abstract

The invention provides a lithium ion conductor with a nanoscale. The lithium ion conductor comprises a mesoporous silicon material and solid solution phase particles dispersed in the mesoporous silicon material, wherein the solid solution phase particles are selected from one or more of LiBH4 solid solution phase particles, 4LiBH4-LiF solid solution phase particles, 4LiBH4-LiCl solid solution phase particles, 4LiBH4-LiBr solid solution phase particles and 4LiBH4-LiI solid solution phase particles; the mesoporous silicon material is SBA-15. The lithium ion conductor has the beneficial effects that a preparation method of the lithium ion conductor is simple and is relatively low in cost; by dispersing lithium borohydride and lithium halide in the mesoporous silicon material, the diffusion path of the ions is greatly shortened, the diffusion network channel of the ions is widened, and the phase inversion temperature of the lithium ion conductor is reduced, thus greatly improving the electrical conductivity of the lithium ion conductor.

Description

technical field [0001] The invention belongs to the field of battery materials, in particular to a lithium ion conductor with a nanoscale and a preparation method thereof. Background technique [0002] Lithium-ion secondary batteries are currently widely used as power sources for electronic devices such as notebook computers, tablet computers, mobile phones, digital cameras, and cameras, and are likely to be widely used in plug-in or hybrid electric vehicles in the future. However, the electrolyte of existing lithium-ion secondary batteries usually uses flammable liquid organic substances. When the size of the battery is further enlarged and the charge and discharge power is further increased, this type of electrolyte will bring many unpredictable safety hazards to the use of the battery. . [0003] In recent years, it has been proposed to use inorganic solid-phase electrolytes instead of organic liquid-phase electrolytes to eliminate potential safety hazards in the large-s...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/58B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M10/0562H01M2300/0068Y02E60/10
Inventor 张耀
Owner SOUTHEAST UNIV
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