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Process for preparing alloy composite negative electrode material for lithium ion batteries

A lithium-ion battery and negative electrode technology, applied in battery electrodes, electrode manufacturing, circuits, etc., can solve problems such as difficult large-scale production, pollution, difficult to recover surfactants, etc., and achieve simple process, low technical cost, and excellent battery life. The effect of chemical properties

Inactive Publication Date: 2012-05-30
UMICORE AG & CO KG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the yield of this method is low, it is difficult to achieve large-scale production, it is very difficult to recover the surfactant after the reaction is complete, and it is easy to cause pollution and waste

Method used

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  • Process for preparing alloy composite negative electrode material for lithium ion batteries
  • Process for preparing alloy composite negative electrode material for lithium ion batteries
  • Process for preparing alloy composite negative electrode material for lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] First, weigh CuO and SnO with a molar ratio of Cu:Sn of 6:5 2 Nano oxide; Then take by weighing 60% water-soluble phenolic resin solution and obtain resin: (CuO+SnO 2 )=5:3 weight ratio; adding deionized water therein to form a 15wt% solution. The resulting solution is dried with an air flow spray dryer, and the raw material solution is loaded with a peristaltic pump at a speed of 15ml / min; the airflow at the atomizing nozzle is controlled by the pressure of the compressed gas so that it is atomized at about 0.4MPa; The temperature at the gas inlet is controlled at 300°C, and the temperature at the outlet is controlled at 130°C; and the gas at the outlet is released after one-stage vortex separation. The metal oxide-embedded phenolic resin obtained by spray drying was calcined at 1000 °C for 5 hours under the protection of high-purity nitrogen to obtain Cu with spherical morphology 6 sn 5 / C composite negative electrode material. figure 1 SEM photos are given; fig...

Embodiment 2

[0054] First, weigh Co with a molar ratio of Co:Sn of 1:2 3 o 4 and SnO 2 Nano oxide; Then take by weighing 60% water-soluble phenolic resin solution and obtain resin: (Co 3 o 4 +SnO 2 )=5:3 weight ratio; and deionized water is added therein to form a 15wt% solution. The resulting solution is dried with an airflow spray dryer, and the raw material solution is loaded with a peristaltic pump at a speed of 15ml / min; the airflow at the atomizing nozzle is controlled by the pressure of the compressed gas so that it is atomized at about 0.4MPa; The temperature at the gas inlet was controlled at 300°C, and the temperature at the outlet was controlled at 120°C; and the gas at the outlet was released after one-stage vortex separation. The powders of tin dioxide and cobalt tetraoxide beads containing phenolic resin obtained by spray drying were calcined at 900 °C for 10 hours under the protection of high-purity nitrogen, and finally obtained CoSn with spherical carbon matrix struct...

Embodiment 3

[0056] First, weigh Sb at a molar ratio of Sb:Sn of 1:1 2 o 3 and SnO 2 Nano oxide; Then take the alcohol-soluble phenolic resin powder and obtain the resin: (Sb 2 o 3 +SnO 2 )=5:1 weight ratio; and ethanol is added therein to form a 20wt% solution. The resulting solution is dried with an airflow spray dryer, and the raw material solution is loaded with a peristaltic pump at a speed of 10ml / min; the airflow at the atomizing nozzle is controlled by the pressure of the compressed gas so that it is atomized at about 0.4MPa; The temperature at the gas inlet was controlled at 300°C, and the temperature at the outlet was controlled at 100°C; and the gas at the outlet was released after one-stage vortex separation. The tin dioxide and antimony trioxide beads powder containing phenolic resin obtained by spray drying were calcined at 800 °C for 10 hours under the protection of high-purity nitrogen, and a SnSb / C composite negative electrode material with a spherical carbon matrix s...

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Abstract

The present invention relates to a process for preparing an alloy composite negative electrode material having a spherical carbon matrix structure for lithium ion batteries by spray-drying carbothermal reduction. The invention covers a process for preparing a negative electrode material for a lithium ion battery with a general formula A-M / Carbon, wherein A is a metal selected from the group consisting of Si, Sn, Sb, Ge and Al; and wherein M is different from A and is at least one element selected from the group consisting of B, Cr, Nb, Cu, Zr, Ag, Ni, Zn, Fe, Co, Mn, Sb, Zn, Ca, Mg, V, Ti, In, Al, Ge; and comprising the steps of: - providing a solution comprising an organic polymer and either chemically reducible nanometric A- and M-precursor compounds, or nanometric Si and a chemically reducible M-precursor compound, when said metal A is Si; - spray-drying said solution whereby a A- and M-precursor bearing polymer powder is obtained, and - calcining said powder in a neutral atmosphere at a temperature between 500 and 1000 DEG C for 3 to 10 hours whereby, in this carbothermal reduction, a carbon matrix is obtained bearing homogeneously distributed A-M alloy particles.

Description

technical field [0001] The invention relates to a method for preparing an alloy composite negative electrode material with a spherical carbon matrix structure for a lithium-ion battery by spray-drying carbothermal reduction. Background technique [0002] With the rapid development of the electronics and information industry, a large number of portable electronic products such as mobile communication equipment, notebook computers, digital products, etc. have been widely used, which makes the public have higher requirements for batteries, especially secondary rechargeable batteries. For example: higher capacity, smaller size, lighter weight and longer service life. Lithium-ion batteries have been regarded as a research hotspot by many people due to their advantages such as high energy density, high working voltage, good load performance, fast charging speed, safety and pollution-free, and no impact on memory. [0003] Alloy negative electrode materials for lithium-ion batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/133H01M4/1393
CPCY02E60/122Y02E60/10
Inventor 任建国何向明王莉闫润宝蒲薇华李建军高剑
Owner UMICORE AG & CO KG
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