Metal slurry for electrode formation and production method of the same
First Claim
1. A metal slurry for electrode formation, comprising:
- a spherical metal powder having a mean particle size of 0.1 to 2.0 μ
m and a tap density of 3.0 g/cc or above; and
a dispersion medium for dispersing said spherical metal powder, present in a volume % content ratio with the powder that is between 1;
99 and 40;
60 (powder;
dispersion medium);
said metal slurry having a sediment density of at least 50%.
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Abstract
The present invention provides a metal slurry for electrode formation which slurry is high in dispersion property and enables formation of high density electrode films. The metal slurry for electrode formation is composed of a spherical metal powder of 0.1 to 2.0 μm in mean particle size and a dispersion medium. By making the spherical metal powder have a mean particle size falling within the range from 0.1 to 2.0 μm, there can be obtained a metal slurry for electrode formation which slurry can be coated through a nozzle and is high in dispersion property, without using expensive nanoparticles. In addition, as the dispersion medium, water or lower molecular weight alcohols can be used. Furthermore, the dispersion property can be improved by further adding a dispersant of 10 wt % or below (exclusive of zero) in relation to the metal powder.
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Citations
16 Claims
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1. A metal slurry for electrode formation, comprising:
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a spherical metal powder having a mean particle size of 0.1 to 2.0 μ
m and a tap density of 3.0 g/cc or above; anda dispersion medium for dispersing said spherical metal powder, present in a volume % content ratio with the powder that is between 1;
99 and 40;
60 (powder;
dispersion medium);said metal slurry having a sediment density of at least 50%. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A production method of a metal slurry for electrode formation, which slurry comprises a mixture of a dispersion medium and a spherical metal powder present in a volume % content ratio that is between 1:
- 99 and 40;
60 (powder;
dispersion medium); and
has a sediment density of at least 50%, said method comprising the steps of preparing a spherical metal powder of 0.1 to 2.0 pin in mean particle size, having a tap density of 3.0 g/cc or above, and mixing together said metal powder and said dispersion medium. - View Dependent Claims (9, 10, 11, 16)
- 99 and 40;
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12. A metal slurry for electrode formation, comprising:
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a spherical metal powder having a sphericity of 0.7 to 1.0 and a tap density of 3.0 g/cc or above; and water as a dispersion medium for dispersing said metal powder, wherein; said metal slurry has a sediment density of at least 50% and is jet printable with a print head. - View Dependent Claims (13, 14, 15)
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Specification