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Active material for cell and preparing method

A technology of active materials and batteries, which is applied in secondary battery manufacturing, electrode manufacturing, secondary batteries, etc., and can solve problems such as not being able to improve the electrochemical characteristics of batteries

Inactive Publication Date: 2007-08-22
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology cannot improve the electrochemical characteristics of the battery very well.

Method used

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  • Active material for cell and preparing method
  • Active material for cell and preparing method
  • Active material for cell and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] 100ml of water, 500g of zirconia balls, 3g of conductive agent Super P, and 0.5g of OROTAN (manufactured by Hanchung Chem) were added to a 300ml plastic bottle, and ball milled for 2 hours to obtain a suspension in which Super P was completely dispersed.

[0125] A suspension was prepared by suspending 1 g of gelatin in 200 ml of water and mixing well. 100 g of LiCoO with an average diameter of 10 μm 2 added to the suspension. The pH value of the suspension is controlled at 3-4 by adding acetic acid. The suspension was filtered to remove any gelatin that did not coat the active material. Water was added to the filtered suspension again while controlling its pH value at 5-8. Then, the suspension in which Super P was completely dispersed was added to the pH-controlled suspension and thoroughly mixed for 5 minutes. Under this pH condition, -COO in gelatin - group forms a hydrogen bond with the -OH group in Super P.

[0126] After mixing, the Super P-coated LiCoO 2 P...

Embodiment 2

[0129] A coin-type half-cell was prepared in the same manner as in Example 1, except that the amount of gelatin used was 2 g.

Embodiment 3

[0131] A coin-type half-cell was prepared in the same manner as in Example 1, except that the amount of gelatin used was 3 g.

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Abstract

An active material for a battery is provided with a coating layer including either a conductive agent, or a coating layer having a mixture of a conductive agent, and a conductive polymeric dispersant.

Description

technical field [0001] The present invention relates to an active material for a battery and a preparation method thereof, and more particularly, to an active material for a battery having excellent electrochemical characteristics and thermal stability and a preparation method thereof. Background technique [0002] Recently, due to the reduction in size and weight of portable electronic devices, there is a need to develop batteries for portable electronic devices that have both high energy density and high power density. Furthermore, it is required that such batteries can be produced in a cost-effective manner while being reliable and safe. [0003] Generally, batteries are classified into primary batteries that can be used only once and then discarded, and secondary batteries that can be recharged and used repeatedly. Primary batteries include manganese batteries, alkaline batteries, mercury batteries, and silver oxide batteries. Secondary batteries include lead-acid batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M10/38H01M4/04B05D5/12H01M2/02H01M4/02H01M4/139H01M4/38H01M4/40H01M4/48H01M4/485H01M4/50H01M4/505H01M4/52H01M4/525H01M4/58H01M4/587H01M4/62H01M10/04H01M10/052H01M10/36
CPCH01M4/5825H01M4/505H01M4/525H01M2/0217H01M4/62H01M4/139H01M4/38H01M4/587H01M4/581H01M4/485H01M10/0431Y02E60/122H01M10/052H01M4/366H01M2004/021H01M4/387H01M4/386Y10T29/49115Y02E60/10H01M50/103Y02P70/50H01M4/48H01M4/137H01M4/04
Inventor 曹在弼丁元一朴容撤金根培
Owner SAMSUNG SDI CO LTD