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Method for producing composite material of metal oxide and conductive carbon

A technology of conductive carbon and composite materials, applied in chemical instruments and methods, conductive materials dispersed in non-conductive inorganic materials, nickel compounds, etc., can solve the problems that the application has not been fully studied, and achieve excellent rate characteristics

Inactive Publication Date: 2017-10-27
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Patent Document 3 specifically shows a sol-gel reaction accelerated by application of shear stress and centrifugal force, and the application of this reaction method has not yet been sufficiently studied.

Method used

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  • Method for producing composite material of metal oxide and conductive carbon
  • Method for producing composite material of metal oxide and conductive carbon
  • Method for producing composite material of metal oxide and conductive carbon

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0087] To Japanese Patent Application Laid-Open No. 2007-160151 figure 1 As shown, a concentric cylinder including an outer cylinder and an inner cylinder, a through hole is provided on the side of the inner cylinder, and a baffle is arranged at the opening of the outer cylinder. Into the inner cylinder of the reactor, 2.45 g of Mn(CH 3 COO) 2 4H 2 O and 0.225g of Ketjen black (particle size about 40nm) added to the liquid in 75mL of water, according to the reaction liquid to apply 70000kgms- 2 The centrifugal force makes the inner cylinder rotate for 300 seconds, so that Mn(CH 3 COO) 2 4H 2 O dissolves and disperses Ketjen Black. Temporarily stop the rotation of the inner cylinder, add 0.6g of LiOH·H to the inner cylinder 2 O is soluble in water liquid. The pH of the liquid is 10. Then, apply 70000kgms to the reaction solution again according to -2 The centrifugal force makes the inner cylinder rotate for 300 seconds. During this time, nuclei of Mn hydroxide were fo...

Embodiment 2

[0089] The procedure of Example 1 was repeated except that the heat treatment was performed at 300° C. for 1 hour in the air instead of the heat treatment at 280° C. for 1 hour in the air.

Embodiment 3

[0091] The procedure of Example 1 was repeated except that the heat treatment was performed at 350° C. for 1 hour in air instead of the heat treatment at 280° C. in air for 1 hour.

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Abstract

Provided is a method whereby metal oxide nanoparticles having evenness of size are efficiently and highly dispersedly adhered to conductive carbon powder. This method comprises: a preparation step in which a reaction solution containing water, a compound with a transition metal selected from the group consisting of Mn, Fe, Co, and Ni, and conductive carbon powder and having a pH in the range of 9 to 11 is introduced into a rotatable reactor; a supporting step in which the reactor is rotated to apply shear stress and centrifugal force to the reaction solution, thereby yielding a core of a hydroxide of the transition metal and dispersing the thus-yielded core of a hydroxide of the transition metal and the conductive carbon powder and simultaneously supporting the hydroxide of the transition metal by the conductive carbon powder; and a heat treatment step in which the conductive carbon powder loaded with the hydroxide of the transition metal is heated to thereby convert the hydroxide supported by the conductive carbon powder into an oxide nanoparticle.

Description

technical field [0001] The present invention relates to a method for producing a composite material including nanoparticles of metal oxides of any one of Fe, Ni, Co, and Mn and conductive carbon powder. Background technique [0002] Composite materials containing metal oxides and conductive carbon are widely used in fuel cells, secondary batteries, electrochemical capacitors, antistatic materials, and the like. In particular, composite oxides of transition metals such as Mn, Ni, Co, and Fe, and typical metals belonging to Group 1 or Group 2 of the periodic table, such as Li and Mg, are expected to be used in secondary batteries such as lithium ion secondary batteries and magnesium ion secondary batteries. Composites of these complex oxides and conductive carbon are frequently studied as cathode active materials for batteries. [0003] These composite materials are generally produced by a method of mixing metal oxide particles and conductive carbon powder, or a method of sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505C01G45/12C01G53/00H01M4/36H01M4/50H01M4/52H01M4/525
CPCC01G45/02C01G45/1242C01G53/62C01P2002/32C01P2002/72C01P2002/88C01P2004/03C01P2004/04C01P2004/64C01P2004/80H01M4/366H01M4/483H01M4/505H01M4/525H01M4/587H01M4/9016H01M4/9083H01B1/18H01M4/625H01M10/052Y02E60/10Y02E60/50
Inventor 直井胜彦直井和子久保田智志米仓大介石本修一玉光贤次
Owner NIPPON CHIMI CON CORP