Non-aqueous electrolyte secondary battery
AssigneeKao Corporation
InventorsYoshio Kajiura, Tetsuya Kusakabe, Nobuyuki Isshiki
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Abstract
A process for producing a porous sintered positive electrode for a secondary battery. The steps include: (a) calcining a raw material containing a lithium compound under an oxidizing atmosphere to form calcined powders; (b) mixing the calcined powders with organic fibers or organic polymer particles to form a raw mixture; (c) forming the raw mixture into a raw electrode; and (d) heating the raw electrode to remove any organic fibers or any organic polymer particles.
Claims3
A process for producing a positive electrode for a secondary battery, said process comprising:
- (a) calcining a raw material containing a lithium compound under an oxidizing atmosphere to produce calcined powders;
- (b) forming said calcined powders to a shape of an electrode after incorporating organic fibers or organic polymer particles thereinto;
- and
- (c) calcining the formed calcined powders under the oxidizing atmosphere, thereby obtaining a porous sintered positive electrode;
- wherein the calcining in step (a) of the raw material is conducted at a temperature lower than the temperature of calcining in step (c) of the formed powders;
- and
- wherein the calcining of the raw material in step (a) is conducted for a period of time less than the period of time of calcining in step (c) of the formed powders.
A process for producing a positive electrode for a secondary battery, said process comprising:
- (a) calcining a raw material containing a lithium compound under an oxidizing atmosphere to produce calcined powders;
- (b) forming said calcined powders to a shape of an electrode after incorporating organic fibers or organic polymer particles thereinto;
- and
- (c) calcining the formed calcined powders under the oxidizing atmosphere, thereby obtaining a porous sintered positive electrode;
- wherein the calcining in step (a) of the raw material is conducted at a temperature lower than the temperature of calcining in step (c) of the formed powders;
- wherein the calcining of the raw material in step (a) is conducted for a period of time less than the period of time of calcining in step (c) of the formed powders;
- and
- wherein said organic fibers have a cross-sectional diameter of 0.1 to 100 μm and said organic polymer particles have a diameter of 0.1 to 100 μm.
A process for producing a porous sintered positive electrode for a secondary battery, said process comprising:
- (a) calcining a raw material containing a lithium compound under an oxidizing atmosphere to produce calcined powders;
- (b) mixing the calcined powders with a removable material selected from the group consisting of organic fibers and organic polymer particles to form a raw mixture;
- (c) forming said raw mixture into a raw electrode;
- and
- (d) heating said raw electrode to remove the removable material, thereby converting said raw electrode into a porous sintered positive electrode;
- wherein the calcining in step (a) of the raw material is conducted at a temperature lower than the temperature of calcining in step (d) of the formed powders;
- and
- wherein the calcining of the raw material in step (a) is conducted for a period of time less than the period of time of calcining in step (d) of the formed powders.
Dependencies are inferred from the claim text.