Preparation method of multi-stage nanopore electrode material of lithium ion battery

A lithium-ion battery, nano-channel technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of small reactive area, poor lithium ion and electron transport ability, etc., and achieve regular distribution and orderly degree. High, uniform aperture size effect

Inactive Publication Date: 2010-09-01
HARBIN INST OF TECH
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-level nanoporous electrode material for lithium-ion batteries to solve the problems of the existing sub-micron or micron-structured lithium-ion battery materials, which have a small reaction area and poor transport capacity of lithium ions and electrons. preparation method

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  • Preparation method of multi-stage nanopore electrode material of lithium ion battery
  • Preparation method of multi-stage nanopore electrode material of lithium ion battery
  • Preparation method of multi-stage nanopore electrode material of lithium ion battery

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specific Embodiment approach 1

[0014] The lithium-ion battery multi-level nanoporous electrode material obtained in this embodiment is ordered mesoporous TiO 2 The thin film material is analyzed by a specific surface analyzer (produced by Micromeritics Instrument Company of the United States, model: ASAP2020), and the obtained ordered mesoporous TiO 2 The pore size in the thin film material is 2-8nm, the pore size is uniform, and the order degree is high.

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the ionic liquid described in step one is ionic liquid C16mimBr, ionic liquid EMIMBF4, ionic liquid BMIMCl, ionic liquid C16mimCl or ionic liquid BMIMPF 6 . Others are the same as the first embodiment.

specific Embodiment approach 2

[0016] Specific embodiment three: the preparation method of lithium-ion battery multilevel nanopore electrode material in the present embodiment is as follows: 1, 3.4g ionic liquid C16mimBr or 3.75g ionic liquid EMIMBF4 are dissolved in 20ml ethanol, add 4ml titanium tetrachloride, Then stir for 3 hours to obtain the mixture; 2. Cultivate the mixture in a constant temperature and humidity box with a temperature of 40°C and a humidity of 50% for 48 hours, and then dry it at 120°C for 24 hours until the mixture solidifies, and then transfer the solidified mixture In a box furnace, the temperature is raised to 350° C. at a rate of 1° C. per minute, and calcined at 350° C. for 4 hours to obtain a lithium-ion battery multi-level nanoporous electrode material.

specific Embodiment approach 3

[0017] The lithium-ion battery multi-level nanoporous electrode material obtained in this embodiment is ordered mesoporous TiO 2 The thin film material is analyzed by a specific surface analyzer (produced by Micromeritics Instrument Company of the United States, model: ASAP2020), and the obtained ordered mesoporous TiO 2 The pore size in the thin film material is about 2.3nm, the pore size is uniform, and the order degree is high.

[0018]Specific embodiment four: the preparation method of lithium-ion battery multi-level nanoporous electrode material in this embodiment is as follows: 1. Dissolve 3ml~4ml tetraisopropoxide titanium oxide in 15ml isopropanol, then add 2ml~4ml HCl solution, Stir for 1h to obtain a clear solution; 2. Dissolve the block copolymer in isopropanol, then add it to the clear solution and stir for 3h to obtain a mixture. The molar ratio of titanium isopropoxide to the block copolymer in the mixture is 1 ~1.3:0.02~0.025, the molar ratio of block copolymer...

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Abstract

The invention discloses a preparation method of a multi-stage nanopore electrode material of a lithium ion battery and relates to the preparation method of a pore electrode. The preparation method can solve the problems of small reaction active region and poor transportation capacity of lithium ions and electrons of the lithium ion battery material with a sub-micron or micron structure. The method comprises the following steps: 1) preparing sol a; 2) preparing sol b; 3) mixing the sol a with the sol b, and obtaining sol c; and 4) placing a polystyrene colloidal crystal template into the sol c, adopting the dipping-pulling method for obtaining a layer of sol film, then culturing, drying and calcining; or culturing, drying and calcining the sol c, and finally obtaining the multi-stage nanopore electrode material of the ion battery. The prepared electrode material has uniform pore size, high degree of order, and regular and orderly distribution, and can increase the reaction active region, simultaneously provide a channel for transporting the lithium ions and the electrons and further improve the transportation capacity of the lithium ions and the electrons.

Description

technical field [0001] The invention relates to a method for preparing a hole electrode. Background technique [0002] With the gradual scarcity of oil resources, environmental pollution has become increasingly serious. The comprehensive and efficient development and utilization of new energy technologies and environmental protection technologies has become a very urgent issue. Electric bicycles and electric vehicles have received unprecedented attention and development. Lithium-ion batteries are considered to be a very promising battery for electric vehicles because of their high energy density, high output voltage (average 3.7V) and no pollution. Compared with traditional batteries, the application of lithium-ion batteries in the field of power batteries has obvious technical advantages. However, the existing lithium-ion battery materials with various structures are mostly submicron or micron structures, and the submicron or micron-structured battery materials have a sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 张乃庆柳志民孙克宁李伟廖成龙雷征宇
Owner HARBIN INST OF TECH
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