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A silver-coated spinel-type limn 2 o 4 Composite material and its preparation method

A technology of spinel type and composite materials, which is applied in the preparation of composite materials and the field of composite materials of silver single substance coated spinel type LiMn2O4, which can solve the problems of many steps and complicated preparation process

Active Publication Date: 2020-04-24
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these existing technologies have technical defects such as complex preparation process, many steps, and some use organic solvents.

Method used

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  • A silver-coated spinel-type limn <sub>2</sub> o <sub>4</sub> Composite material and its preparation method
  • A silver-coated spinel-type limn <sub>2</sub> o <sub>4</sub> Composite material and its preparation method
  • A silver-coated spinel-type limn <sub>2</sub> o <sub>4</sub> Composite material and its preparation method

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Embodiment 1

[0066] Embodiment 1: Silver single substance coated spinel LiMn of the present invention 2 o 4 preparation of composite materials.

[0067] The implementation mode of this embodiment is as follows:

[0068] A. Preparation of silver nitrate solution

[0069] Silver nitrate is dissolved in distilled water to prepare a silver nitrate solution with a concentration of 0.8% by weight;

[0070] B. Preparation of precursor

[0071] Spinel-type LiMn sold under the trade name lithium manganate by Beijing Huoke Technology Co., Ltd. 2 o 4 , mix well with glucose according to the weight ratio of 10:0.8, and then add the mixture to the silver nitrate solution obtained in step B, wherein LiMn 2 o 4 The weight ratio of silver to silver nitrate is 1:0.02, using a stirrer at a speed of 30rpm to stir and mix for 2.2h to make spinel LiMn 2 o 4 Disperse evenly to obtain a slurry mixture, and then heat in a drying oven at a temperature of 105° C. for 1.0 h to evaporate and remove moisture ...

Embodiment 2

[0075] Embodiment 2: Silver single substance coated spinel LiMn of the present invention 2 o 4 preparation of composite materials.

[0076] The implementation mode of this embodiment is as follows:

[0077] A. Preparation of silver nitrate solution

[0078] Silver nitrate is dissolved in distilled water to prepare a silver nitrate solution with a concentration of 0.5% by weight;

[0079] B. Preparation of precursor

[0080] Spinel-type LiMn prepared according to the method of Jintao Liu et al. (Solid State Ionics, 2017, 307:79–89) 2 o 4 Mix evenly with glucose at a weight ratio of 10:0.5, and then add the mixture to the silver nitrate solution obtained in step B, wherein LiMn 2 o 4 The weight ratio of silver to silver nitrate is 1:0.10, using a stirrer at a speed of 50rpm to stir and mix for 1.8h to make spinel LiMn 2 o 4 Disperse evenly to obtain a slurry mixture, and then heat in a drying oven at a temperature of 105° C. for 2.0 h to evaporate and remove moisture to...

Embodiment 3

[0084] Embodiment 3: Silver single substance coated spinel LiMn of the present invention 2 o 4 preparation of composite materials.

[0085] The implementation mode of this embodiment is as follows:

[0086] A. Preparation of silver nitrate solution

[0087] Silver nitrate is dissolved in distilled water to prepare a silver nitrate solution with a concentration of 1.4% by weight;

[0088] B. Preparation of precursor

[0089] Spinel-type LiMn sold under the trade name lithium manganate by Beijing Huoke Technology Co., Ltd. 2 o 4 Mix evenly with glucose at a weight ratio of 10:0.6, and then add the mixture to the silver nitrate solution obtained in step B, wherein LiMn 2 o 4 The weight ratio of silver to silver nitrate is 1:0.06, using a mixer at a speed of 60rpm to stir and mix for 2.0h to make spinel LiMn 2 o 4 Disperse evenly to obtain a slurry mixture, and then heat it in a drying oven at a temperature of 105°C for 1.6 h to evaporate and remove moisture to obtain a p...

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Abstract

The invention relates to a preparation method of an elemental silver coating spinel-type LiMn2O4 composite material. The preparation method comprises the steps of preparing a silver nitrate solution,preparing a precursor, heating for combusting, and the like. Compared with the prior art, the composite material and the preparation method have the beneficial technical effects that a target productcan be rapidly prepared under low temperature, and moreover, the processes are simple; the cost is low; industrial production can be easily performed.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries. More specifically, the present invention relates to a kind of silver single substance coated spinel type LiMn 2 o 4 The composite material also involves the silver element-coated spinel-type LiMn 2 o 4 method for the preparation of composite materials. Background technique [0002] Lithium-ion battery is a kind of green environment-friendly battery, and its cathode material is one of the key materials for manufacturing lithium-ion batteries. The cathode material currently used and researched is mainly lithium cobalt oxide (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium iron phosphate (LiFePO 4 ) and spinel lithium manganate (LiMn 2 o 4 ) and other materials. where LiMn 2 o 4 It is a positive electrode material for lithium-ion batteries in the ascendant. It has the advantages of non-toxicity, good safety, no environmental pollution, high working voltage, low cost, and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/505H01M10/0525
CPCH01M4/366H01M4/38H01M4/505H01M10/0525Y02E60/10
Inventor 郭俊明黄技军郭昱娇苏长伟刘晓芳白玮向明武
Owner YUNNAN MINZU UNIV
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