Storage battery electrode, manufacturing method thereof, storage battery, and electronic device
In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided. As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.
1. A method for manufacturing a storage battery electrode, comprising:
forming a first aqueous solution by mixing an active material with an aqueous solution including an oxidized derivative of a first conductive additive;
forming a first mixture by drying the aqueous solution;
forming a second mixture by mixing a second conductive additive and a binder;
forming a third mixture by mixing the first mixture and the second mixture; and
coating a current collector with the third mixture and reducing the oxidized derivative of the first conductive additive.
2. The method for manufacturing a storage battery electrode according to claim 1 , characterized by adding a reducing agent to the first mixture after forming the first mixture.
3. The method for manufacturing a storage battery electrode according to claim 1 , characterized in that the aqueous solution including the oxidized derivative of the first conductive additive is acidic.
4. The method for manufacturing a storage battery electrode according to claim 1 , characterized in that the active material is basic.
5. A storage battery electrode manufactured by the method for manufacturing a storage battery electrode according to claim 1 .
6. A storage battery comprising a first electrode and a second electrode,
wherein the first electrode is the storage battery electrode according to claim 5 ,
wherein the first electrode has a function of operating as one of a positive electrode and a negative electrode, and
wherein the second electrode has a function of operating as the other of the positive electrode and the negative electrode.
7. An electronic device comprising the storage battery according to claim 6 and a display panel, a light source, an operation key, a speaker, or a microphone.