Localized heat treatment of battery component films
First Claim
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1. A battery fabrication method comprising:
- (a) forming on a substrate, at least a portion of a battery cell comprising a plurality of battery component films that include an underlying film with an overlying metal-containing film;
(b) selecting an electromagnetic radiation beam that has a reflection coefficient from the underlying film of at least about 5%; and
(c) locally heating a beam incident area on the metal-containing film by directing onto the metal-containing film, the selected electromagnetic radiation beam maintained at a fluence of at least about 800 J/cm2, wherein the metal-containing film is heated to a temperature that is at least 100°
C. higher than the temperature attained by the underlying film.
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Abstract
A battery fabrication method includes forming on a substrate, at least a portion of a battery cell having a plurality of battery component films that include an underlying film with an overlying metal-containing film. A beam incident area of the metal-containing film is locally heated by directing onto the metal-containing film, an energy beam maintained at a fluence of at least about 800 J/cm2. The metal-containing film is heated to a temperature that is at least 100° C. higher than the temperature attained by the underlying film.
228 Citations
24 Claims
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1. A battery fabrication method comprising:
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(a) forming on a substrate, at least a portion of a battery cell comprising a plurality of battery component films that include an underlying film with an overlying metal-containing film; (b) selecting an electromagnetic radiation beam that has a reflection coefficient from the underlying film of at least about 5%; and (c) locally heating a beam incident area on the metal-containing film by directing onto the metal-containing film, the selected electromagnetic radiation beam maintained at a fluence of at least about 800 J/cm2, wherein the metal-containing film is heated to a temperature that is at least 100°
C. higher than the temperature attained by the underlying film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery fabrication method comprising:
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(a) forming on a substrate, at least a portion of a battery cell comprising an elemental metal electrode and a metal oxide electrode; (b) selecting an electromagnetic radiation beam having at least one of the following properties; (i) a beam width of less than about 1000 microns; (ii) that is a CO2 laser beam; and (iii) a wavelength of from about 1 to about 100 microns; and (c) directing the electromagnetic radiation beam onto the metal oxide electrode, the electromagnetic radiation beam being maintained at a sufficiently low power level to heat a beam incident area on the metal oxide electrode to a temperature of at least 400°
C. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A heat treatment method comprising:
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(a) forming on a substrate, at least a portion of a battery cell comprising a plurality of battery component films that include an elemental metal electrode and an overlying metal oxide electrode; (b) selecting an electromagnetic radiation beam having at least one of the following characteristics; (i) a linear attenuation coefficient in the metal oxide electrode of at least about 5×
10−
4;(ii) a reflection coefficient from the elemental metal electrode that is at least about 5%; and (iii) a Half Value Layer in the metal oxide electrode of at least about 1 micron; and (c) directing the electromagnetic radiation beam onto the metal oxide electrode to heat treat the metal oxide electrode. - View Dependent Claims (18, 19)
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20. A battery fabrication method comprising:
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(a) forming on a substrate, at least a portion of a battery cell comprising a plurality of battery component films that include an underlying first metal-containing film and an overlying second metal-containing film; (b) selecting an energy beam comprising at least one of; (i) a linear attenuation coefficient in the second metal-containing film of at least about 5×
10−
4; and(ii) a Half Value Layer in the second metal-containing film of at least about 1 micron; and (c) directing onto the second metal-containing film, the selected energy beam maintained at a fluence of at least about 800 J/cm2 to locally heat a beam incident area on the second metal-containing film to a temperature that is (i) at least 400°
C., and (ii) at least 100°
C. higher than the temperature attained by the first metal-containing film. - View Dependent Claims (21, 22, 23, 24)
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Specification