Lithium ion battery nano composite positive-negative electrode material containing three-dimensional conductive network as well as preparation method thereof

A lithium-ion battery and conductive network technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high rate performance and poor cycle life

Inactive Publication Date: 2014-01-29
南京宏德纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor high-rate performance and cycle life of typical power battery electrode materials, and provide a lithium-ion b...

Method used

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  • Lithium ion battery nano composite positive-negative electrode material containing three-dimensional conductive network as well as preparation method thereof
  • Lithium ion battery nano composite positive-negative electrode material containing three-dimensional conductive network as well as preparation method thereof
  • Lithium ion battery nano composite positive-negative electrode material containing three-dimensional conductive network as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Add 0.1 gram of surfactant to 100 ml of water to fully dissolve at room temperature, add 0.1 gram of silver nanowires to the solution, sonicate (1-10) hours, and stir (1-24) hours to obtain uniform and stable silver nanowire dispersion; then add zero-dimensional conductive nanomaterials (0.1-2) grams, water-soluble binders (0.1-1) grams, lithium iron phosphate / lithium titanate (7.5-9.5) grams in sequence, and ultrasonically (0.1 -10) hours, stirring for (0.1-10) hours, to obtain a lithium-ion battery nanocomposite material with a three-dimensional spatial conductive network.

Embodiment 2

[0039] Add 0.1 gram of surfactant to 100 ml of water to fully dissolve at room temperature, add 0.1 gram of silver nanorods to the solution, ultrasonically (1-10) hours, and stir (1-24) hours to obtain a uniform and stable silver nanorod dispersion; then add zero-dimensional conductive nanomaterials (0.1-2) grams, water-soluble binders (0.1-1) grams, lithium iron phosphate / lithium titanate (7.5-9.5) grams in sequence, and ultrasonically (0.1 -10) hours, stirring for (0.1-10) hours, to obtain a lithium-ion battery nanocomposite material with a three-dimensional spatial conductive network.

Embodiment 3

[0041] Add 0.1 gram of surfactant to 100 ml of water to fully dissolve at room temperature, add 0.1 gram of copper nanowires to the solution, sonicate (1-10) hours, and stir (1-24) hours to obtain uniform and stable copper nanowire dispersion; then add zero-dimensional conductive nanomaterials (0.1-2) grams, water-soluble binders (0.1-1) grams, lithium iron phosphate / lithium titanate (7.5-9.5) grams in sequence, and ultrasonically (0.1 -10) hours, stirring for (0.1-10) hours, to obtain a lithium-ion battery nanocomposite material with a three-dimensional spatial conductive network.

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Abstract

The invention discloses a lithium ion battery nano composite positive-negative electrode material containing a three-dimensional conductive network as well as a preparation method thereof. Technical key point is that the three-dimensional conductive network is built by comprehensively using a modified and dispersed one-dimensional conductive nano material with great slenderness ratio and high strength and a zero-dimensional nano conductive material under action of a binding agent, so that mechanical strength and processing performance of the positive-negative electrode material of the lithium ion battery as well as transmissibility of electrons among particles are improved, and therefore, a problem that the typical lithium ion battery electrode material is poor in great multiplying power performance and short in cycle life is solved. The preparation method of the lithium ion battery nano composite positive-negative electrode material comprises the following steps: firstly, adding the one-dimensional conductive nano material into water or an organic solvent containing a surfactant for ultrasonic treatment and stirring treatment so as to sufficiently disperse one-dimensional conductive nano material; and then, respectively adding the dispersing liquid into a zero-dimensional conductive agent, a binding agent and the positive-negative electrode material for ultrasonically stirring and stirring for a certain time at a high speed to obtain the lithium ion battery nano composite positive-negative electrode material containing the three-dimensional conductive network.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery electrode materials, in particular to a lithium-ion battery nanocomposite positive and negative electrode material containing a three-dimensional space conductive network with high capacity, long life and high power and a preparation method. Background technique [0002] The world is facing increasing pressure to reduce carbon emissions. According to statistics from the World Automobile Organization (OICA), vehicle exhaust emissions have accounted for 2 About 16% of total emissions. Therefore, it is imperative to promote the use of clean energy vehicles. The development of power batteries for electric vehicles is crucial to reducing dependence on oil and reducing CO 2 It is of great significance to alleviate the global greenhouse effect. [0003] Batteries are currently the biggest bottleneck in the technology and cost of new energy vehicles. Traditional lead-acid batteries, nickel-...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/58H01M4/525H01M4/505
CPCY02E60/122H01M4/505H01M4/525H01M4/5825H01M4/587H01M4/625H01M4/626H01M10/0525Y02E60/10
Inventor 沈同德李静冯卫良
Owner 南京宏德纳米材料有限公司
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