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US 9,178,211 B2Granted
Method of producing electrode and method of producing nonaqueous electrolyte battery
AssigneeKabushiki Kaisha Toshiba
InventorsHideaki Morishima, Hiroki Inagaki, Hidesato Saruwatari, Shinsuke Matsuno, Yumi Fujita, Norio Takami
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Abstract
A method of producing an electrode including decreasing a yield stress of a slurry containing an active material to two-thirds or less, and applying the slurry to a current collector.
Claims25
A method of producing a negative electrode, comprising:
- mixing a negative electrode active material, a conductive agent, a binder and a solvent to make a slurry;
- reducing a yield stress of the slurry from a yield stress X1 to a yield stress X2 by passing the slurry through a static mixer or a mesh filter as a yield stress regulator, where X2 is two-thirds or less of X1;
- and
- applying the slurry to a current collector with a die-coater,
- wherein
- the method satisfies the following equation (I):
- 0≦{(X3−X2)/(X1−X2)}×100≦20 (I)
- where X3 is a yield stress of the slurry when the slurry is applied to the current collector using the die-coater, and
- said reducing comprises passing the slurry from a feeder pump to a die coater through the yield stress regulator, wherein the length from the feeder pump to the die coater is L1, wherein the length from the yield stress regulator to the die coater is L2, and wherein a ratio of L2/L1 satisfies formula (II):
- (L2/L1)×100≦5.
7 more elements
A method of producing a nonaqueous electrolyte battery comprising a positive electrode, a negative electrode and a nonaqueous electrolyte, where the negative electrode is produced by a process comprising:
- mixing a negative electrode active material, a conductive agent, a binder and a solvent to make a slurry;
- reducing a yield stress of the slurry from a yield stress X1 to a yield stress X2 by passing the slurry through a static mixer or a mesh filter as a yield stress regulator, where X2 is two-thirds or less of X1;
- and
- applying the slurry to a current collector with a die-coater, wherein
- the process satisfies the following equation (I):
- 0≦{(X3−X2)/(X1−X2)}×100≦20 (I)
- where X3 is a yield stress of the slurry when the slurry is applied to the current collector using the die-coater, and
- said reducing comprises passing the slurry from a feeder pump to a die coater through the yield stress regulator, wherein the length from the feeder pump to the die coater is L1, wherein the length from the yield stress regulator to the die coater is L2, and wherein a ratio of L2/L1 satisfies formula (II):
- (L2/L1)×100≦5.
6 more elements
Dependencies are inferred from the claim text.