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Three-dimensional nanoporous metal-oxide electrode material of lithium ion battery and preparation method thereof

一种锂离子电池、三维纳米的技术，应用在电池电极、非水电解质蓄电池电极、电极制造等方向，能够解决难以满足电池高容量化的要求、体积比容量没有优势、碳材料的充放电比容量低等问题，达到适于大规模推广应用、提高比表面积和离子导电性能、操作简单方便的效果

Inactive Publication Date: 2011-01-05
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the charge-discharge specific capacity of carbon materials is low, and the volume specific capacity has no advantage, so it is difficult to meet the high-capacity requirements of electric vehicles and hybrid electric vehicles.

Method used

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  • Three-dimensional nanoporous metal-oxide electrode material of lithium ion battery and preparation method thereof
  • Three-dimensional nanoporous metal-oxide electrode material of lithium ion battery and preparation method thereof
  • Three-dimensional nanoporous metal-oxide electrode material of lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Three-dimensional nanoporous metal oxide electrode material α-Fe for lithium-ion batteries 2 o 3 Preparation and performance testing of

[0032] (1) Preparation of polystyrene colloidal microsphere template

[0033] Adopt the method for emulsion polymerization to prepare 275 ± 10nm polystyrene microsphere emulsion, arrange microsphere into polystyrene colloidal microsphere template (such as figure 2 As shown), the scanning electron microscope shows that the polystyrene colloidal microsphere template is multi-layered, orderly, and regularly arranged in a large area, with fewer defects and a strong sense of hierarchy.

[0034] (2) Three-dimensional nanoporous metal oxide electrode material α-Fe for lithium-ion batteries 2 o 3 the acquisition

[0035] with Fe 3+ The mixed solution of ethylene glycol / methanol is the precursor solution, and the dried polystyrene colloidal microsphere template is soaked in the precursor solution for 5 hours, and the precursor template ...

Embodiment 2

[0040] Three-dimensional nanoporous metal oxide electrode material CoFe for lithium-ion batteries 2 o 4 Preparation and performance testing of

[0041] (1) Preparation of polystyrene colloidal microsphere template

[0042] Adopt the method for emulsion polymerization to prepare 275 ± 10nm polystyrene microsphere emulsion, microsphere is arranged into polystyrene colloidal microsphere template (such as Figure 4 As shown), the scanning electron microscope shows that the polystyrene colloidal microsphere template is multi-layered, orderly, and regularly arranged in a large area, with fewer defects and a strong sense of hierarchy.

[0043] (2) CoFe, a three-dimensional nanoporous metal oxide electrode material for lithium-ion batteries 2 o 4 the acquisition

[0044] Prepare the total metal ion concentration to be 1.5mol L-1 (molar ratio, Fe 3+ :Co 2+ =2:1) ​​ethylene glycol / methanol (mixed solution as the precursor solution. Soak the dried PS colloidal crystal template parti...

Embodiment 3

[0049] Three-dimensional nanoporous metal oxide electrode material SnO for lithium-ion batteries 2 · Preparation and performance testing

[0050] (1) Preparation of polystyrene colloidal microsphere template

[0051] Adopt the method for emulsion polymerization to prepare 275 ± 10nm polystyrene microsphere emulsion, microsphere is arranged into polystyrene colloidal microsphere template (such as Figure 4 As shown), the scanning electron microscope shows that the polystyrene colloidal microsphere template is multi-layered, orderly, and regularly arranged in a large area, with fewer defects and a strong sense of hierarchy.

[0052] (2) Three-dimensional nanoporous metal oxide electrode material SnO for lithium-ion batteries 2 the acquisition

[0053] Prepare SnCl with a total metal ion concentration of 0.5mol / L 2 2H 2 The ethanol solution of O is the precursor solution. Soak the dried PS colloidal template particles in the precursor solution for 10 h, and then vacuum filt...

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Abstract

The invention relates to a preparation method of a three-dimensional nanoporous metal-oxide electrode material of a lithium ion battery, which comprises the following steps of: soaking a dried higher-molecular colloid crystal microsphere template for a period of time by using a metal salt solution as a precursor solution, filtering and drying to obtain a precursor-template compound; and preserving heat after heating the precursor-template compound to certain temperature at a low temperature-rise rate, and then cooling to room temperature. Preferably, the higher-molecular colloid crystal microsphere template is prepared by the following method comprising the following steps of: preparing a higher-molecular microsphere emulsion by a higher-molecular emulsion polymerization method, and then obtaining the higher-molecular colloid crystal microsphere template through coprecipitation or centrifugation. The invention also relates to the prepared metal-oxide electrode material. The three-dimensional nanoporous metal-oxide electrode material of the lithium ion battery improves the ionic electric conductivity of the cathode material of the lithium ion battery, shortens the diffusion path of lithium ions in the process of electrochemical reaction and greatly improves the rate discharge performance of the lithium ion battery, and the preparation method has unique design and simple and convenient operation and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to the technical field of lithium-ion battery electrode materials, in particular to a lithium-ion battery three-dimensional nanoporous metal oxide electrode material and a preparation method thereof. Background technique [0002] Through the analysis of the development status of lithium-ion batteries, it can be seen that the market and application fields of lithium-ion batteries will continue to expand rapidly in the next few years. In terms of anode materials for lithium-ion batteries, graphite-based carbon materials will still be the main anode materials for lithium-ion batteries in the future due to their good cycle stability, ideal charging and discharging platform and high cost performance. However, the charge-discharge specific capacity of carbon materials is low, and the volume specific capacity has no advantage, so it is difficult to meet the requirements of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391H01M4/13
CPCY02E60/12H01M4/0471H01M4/1391H01M2004/021H01M4/0497Y02E60/122H01M4/131Y02E60/10H01M4/04
Inventor 孙江明赵铁鹏徐志刚王燕兵王刚张铭谢世荣
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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