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A nanoscale lithium ion conductor and its preparation method

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, reduce phase transition temperature, and increase electrical conductivity Effect

Active Publication Date: 2016-03-16
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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  • A nanoscale lithium ion conductor and its preparation method
  • A nanoscale lithium ion conductor and its preparation method
  • A nanoscale lithium ion conductor and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 14

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

[0022] 4LiBH 4 - Preparation of solid solution phases such as LiF: LiBH with a purity of 95% 4 Mixed with LiF with a purity of 99% at a molar ratio of 4:1, and mechanically milled by a planetary ball mill, the ball-to-material ratio is 40:1, the ball milling time is 2 hours, and the revolution speed is 400rpm to obtain nano-scale particles. .

[0023] 4LiBH 4 - Preparation of LiCl solid solution phase: LiBH with a purity of 95% 4 Mixed with LiCl with a purity of 99% at a molar ratio of 4:1, and mechanically milled by a planetary wheel ball mill, the ball-to-material ratio is 40:1, the ball milling time is 2 hours, and the revolution speed is 400rpm to obtain nano-scale particles. .

[0024] 4LiBH 4 - Preparation of LiBr solid solution phase: LiBH with a purity of 95% 4 It is mixed with LiBr with a purity of 99% at a molar ratio of 4:1, and is mechanically ball milled by a pla...

Embodiment 2

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

[0027] in the 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 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 5h, and the revolution speed was 400rpm, and the lithium ion conductor LiBH with nanoscale was obtained.4 / SBA-15. Since samples readily react with oxygen and water, all sample manipulations were performed in a glove box filled with high-purity argon gas with oxygen and water content below 1 ppm concentration.

[0028] Detection of LiBH by X-ray Diffraction (XRD) Experiment 4 / SBA-15. The sample cell is covered with a specific polymer film, and is sealed with a glass slide with vacuum grease to prevent the action of water and oxygen in the air on the sample. T...

Embodiment 34

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

[0032] in the 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 grinding balls to sample is 20:1, under the protection of high-purity (99.9999%) inert gas , using a planetary wheel ball mill for 6 hours of mechanical ball milling and a revolution speed of 600 rpm to obtain a nanoscale lithium ion conductor 4LiBH 4 -LiI / SBA-15. Since samples readily react with oxygen and water, all sample manipulations were performed in a glove box filled with high-purity argon gas with oxygen and water content below 1 ppm concentration.

[0033] The XRD and TEM patterns are consistent with Example 2.

[0034] The change curve of conductivity with temperature is shown in Figure 4 , it can be seen from the figure: the nano-dispersed 4LiBH 4 -LiI / SBA-15 at lower temperature (60 o c) The ionic condu...

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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, and particularly relates to a lithium ion conductor with nanometer scale 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 the existing lithium-ion secondary battery usually adopts flammable liquid organics. When the size of the battery is further enlarged and the charging and discharging power is further improved, 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 to replace organic liquid-phase electrolytes to eliminate the safety hazards in the l...

Claims

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Application Information

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