Lithium cell negative pole material and preparation thereof

A negative electrode material and lithium battery technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve the problem of low space utilization and achieve the effect of controllable layers

Inactive Publication Date: 2009-06-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently synthesized transition metal oxide hollow electrode materials are all single-layer, and their space utilization is relatively low.

Method used

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  • Lithium cell negative pole material and preparation thereof
  • Lithium cell negative pole material and preparation thereof
  • Lithium cell negative pole material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Add 60 ml of ethylene glycol, 0.02 g of PVP (molecular weight: 30,000) and 1 g of cobalt acetate into 100 ml of polytetrafluoroethylene liner, stir and dissolve, put it in a hydrothermal kettle, and react at 180°C for 12 hours, the resulting solution was washed three times with deionized water and ethanol successively to obtain the precursor powder;

[0022] 2) Calcining the precursor powder at 350° C. for 0.5 hour to obtain single-layer cobalt tetraoxide hollow microspheres, the average particle diameter of the outermost layer is 1.5 μm.

Embodiment 2

[0024] 1) Add 80 ml of ethylene glycol, 0.15 g of PVP, and 1 g of cobalt oxalate to 100 ml of PTFE lining, stir and dissolve, put it in a hydrothermal kettle, and react at 200°C for 24 hours, and dissolve the resulting solution Wash with deionized water and ethanol three times respectively to obtain the precursor powder;

[0025] 2) Calcining the precursor powder at 450° C. for 3 hours to obtain two layers of cobalt tetraoxide hollow microspheres, the average particle diameter of the outermost layer is 2 μm.

Embodiment 3

[0027] 1) Add 70 ml of ethylene glycol, 0.30 g of PVP (molecular weight: 3000), and 1 g of cobalt chloride into 100 ml of polytetrafluoroethylene lining, stir and dissolve, put it in a hydrothermal kettle, and react at 190°C for 20 hours, the resulting solution was washed three times with deionized water and ethanol successively to obtain the precursor powder;

[0028] 2) Calcining the precursor powder at 400° C. for 2 hours to obtain three layers of cobalt tetraoxide hollow microspheres, the average particle diameter of the outermost layer is 3 μm.

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Abstract

The invention relates to a lithium cell cathode material and a method for preparing the same, which belong to the technical field of micron and nanometer material. The prior transition metal oxide lithium cell cathode material is a monolayer and has low space utilization rate. The provided cathode material is a multilayer spherical metal oxide; the layer number of the sphere is between 1 and 4; the particle diameter of the outermost layer is between 1.5 and 5 mu m; the metal oxide is cobaltosic oxide, ferroferric oxide, ferric oxide, nickel oxide or zinc oxide. PVP and soluble salt of cobalt, iron or nickel are dissolved in organic alcohol according to mass ratio of between 0.02-0.5:1 and react in a hydrothermal kettle for 12 to 24 hours at a temperature of between 180 and 200 DEG C to obtain a precursor; and the precursor is calcined for 0.5 to 3 hours at a temperature of between 350 and 450 DEG C to obtain the lithium cell cathode material. The layer number and the particle diameter of the cathode material are controllable; and the lithium cell has high performance and simple preparation.

Description

technical field [0001] The invention belongs to the technical field of micro and nanometer materials, and in particular relates to a multilayer spherical negative electrode material with high lithium battery performance and a preparation method thereof. Background technique [0002] Due to the characteristics of high voltage, large capacity, long cycle life and good safety performance, lithium-ion batteries have potential application prospects in portable electronic devices and even electric vehicles. One of the keys to the development of lithium-ion batteries is to find a suitable negative electrode material, so that the battery has a sufficiently high lithium intercalation capacity and good lithium deintercalation reversibility, so as to ensure the high voltage, large capacity and long cycle life of the battery. Carbon materials have been widely used as anode materials in commercial lithium-ion batteries due to their high specific capacity, and exhibit good electrochemical...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/04H01M4/525
CPCY02E60/12Y02E60/10
Inventor 姚建年马颖王熙
Owner INST OF CHEM CHINESE ACAD OF SCI
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