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LiBH4-silver/silver halide compound fast-ion conductor and preparation method thereof

An ionic conductor and silver halide technology, applied in electrochemical generators, electrical components, circuits, etc., can solve the problems of low-temperature conductivity and high-temperature computer rate, and limit the application of solid electrolytes, and achieve excellent low-temperature conductivity and low cost. Low, the effect of improving ionic conductivity

Inactive Publication Date: 2015-03-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LiBH 4 The low-temperature conductivity and high-temperature computer rate are not high, which limits its further application in solid electrolytes

Method used

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  • LiBH4-silver/silver halide compound fast-ion conductor and preparation method thereof
  • LiBH4-silver/silver halide compound fast-ion conductor and preparation method thereof
  • LiBH4-silver/silver halide compound fast-ion conductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 LiBH 4 - Preparation of Ag Composite Hydride Fast Ion Conductor

[0018] In the isolation of air (H 2 O2 4 Put it into a stainless steel ball tank equipped with stainless steel balls at a molar ratio of 10:1 with Ag; use planetary wheel ball mill mechanical ball milling method, under the protection of high-purity (99.9999%) inert gas, to obtain LiBH 4 -Ag composite particles. The mass of the sample in the spherical tank is 1g, the volume of the spherical tank is 200ml, the weight ratio of the ball to the sample is 40:1, the revolution speed is set to 400rpm, and the ball milling time is 2 hours.

[0019] Take out part of LiBH 4 -Ag composite particles are used for X-ray diffraction (XRD) experiments, the sample cell is covered by a specific polymer film, and is sealed with a vacuum grease to prevent the action of water and oxygen in the air on the sample. The target material of the X-ray source used is a Cu target, the tube voltage is 40kV, and the tube cu...

Embodiment 2

[0022] In the isolation of air (H 2 O2 4 Mix it with AgI at a molar ratio of 10:1, put it into a stainless steel ball tank equipped with stainless steel balls; adopt a planetary wheel ball mill mechanical ball milling method, under the protection of high-purity (99.9999%) inert gas, Get LiBH 4 - AgI complex particles. The mass of the sample in the spherical tank is 1g, the volume of the spherical tank is 200ml, the weight ratio of the ball to the sample is 40:1, the revolution speed is set to 400rpm, and the ball milling time is 2 hours.

[0023] Take out part of LiBH 4 -AgI composite particles are used for X-ray diffraction (XRD) experiments. The sample cell is covered by a specific polymer film, and is sealed with vacuum grease to prevent the effect of water and oxygen in the air on the sample. The target material of the X-ray source used is a Cu target, the tube voltage is 40kV, and the tube current is 40mA. The resulting XRD spectrum is as image 3 shown.

[0024] Th...

Embodiment 3

[0025] Example 3 LiBH 4 - Preparation of AgF Composite Hydride Fast Ion Conductor

[0026] LiBH 4 -AgF composite hydride fast ion conductor is isolated from air (H 2 O2 4 and AgF into a stainless steel spherical tank with stainless steel grinding balls; using a planetary wheel ball mill mechanical ball milling method, under the protection of high-purity (99.9999%) argon, LiBH 4 -AgF mixed evenly. 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. The mass of the sample in the spherical tank is 1g, the volume of the spherical tank is 200ml, the weight ratio of the ball to the sample is 60:1, the revolution speed is set to 600rpm, and the ball milling time is 1 hour.

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Abstract

The invention provides an LiBH4-silver / silver halide compound fast-ion conductor and a preparation method thereof. The LiBH4-silver / silver halide compound fast-ion conductor is prepared from LiBH4 and silver or silver halide which are at the mole ratio of 20:1 to 4:1. The preparation method of the LiBH4-silver / silver halide compound fast-ion conductor, which is provided by the invention, is simple and low in cost, and can be used for stabilizing the high-temperature phase of LiBH4 and increasing the diffusion channel of an Li element by forming an LiBH4-Ag / AgX (X is a halogen element) compound by adding Ag and the halide of Ag to LiBH4, thus greatly enhancing the ionic conductivity compared with the ionic conductivity of LiBH4, achieving the cm-1 order of magnitude at 100 DEG C for 10-3 seconds and providing wider application prospect for solid electrolyte.

Description

technical field [0001] The invention belongs to the field of battery materials, in particular to a LiBH4-silver / silver halide composite fast ion conductor, and also relates to a preparation method of the fast ion conductor. 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. [0003] However, liquid organic substances are widely used in the electrolyte of lithium-ion secondary batteries at present, which has hidden dangers in terms of safety. On the one hand, lithium dendrites are easy to be continuously generated in the electrolyte, which may cause the internal short circuit of the battery due to the puncture of the diaphragm; on the other hand, when the size of the battery is further enlarged and the charge and discharge po...

Claims

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Application Information

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IPC IPC(8): H01M10/0562
CPCH01M10/0525H01M10/0562H01M2300/002Y02E60/10
Inventor 张耀
Owner SOUTHEAST UNIV
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