Electrical double layer capacitor and production method therefor
AssigneePanasonic Corporation
InventorHiroyuki Maeshima
Life of this patent
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Abstract
The electrical double layer capacitor includes a case, an electrolyte stored in the case, a positive electrode, a negative electrode, and a molecular sieve, wherein the electrolyte contains cation and anion, and the molecular sieve suppresses either one or both of the adsorption of cation onto a surface of the positive electrode and the adsorption of anion onto a surface of the negative electrode. Due to this configuration, it is possible to provide an electrical double layer capacitor having high withstand voltage and long life.
Claims20
An electrical double layer capacitor, comprising:
- a case;
- an electrolyte containing a cation and an anion, which is stored in the case;
- a positive electrode and a negative electrode stored in the case;
- and
- a first molecular sieve suppressing adsorption of the cation onto a surface of the positive electrode,
- wherein the positive electrode includes active carbon having a pore, and
- the first molecular sieve is the pore having an average pore radius that allows intrusion of the anion and suppresses intrusion of the cation.
An electrical double layer capacitor, comprising:
- a case;
- an electrolyte containing a cation and an anion, which is stored in the case;
- a positive electrode and a negative electrode stored in the case;
- and
- a first molecular sieve suppressing adsorption of the cation onto a surface of the positive electrode,
- wherein the positive electrode includes a first coat which has a pore and coats the surface of the positive electrode, and
- the first molecular sieve is the pore having an average pore radius that allows passing of the anion and suppresses passing of the cation.
An electrical double layer capacitor, comprising:
- a case;
- an electrolyte containing a cation and an anion, which is stored in the case;
- a positive electrode and a negative electrode stored in the case;
- and
- a second molecular sieve suppressing adsorption of the anion onto a surface of a negative electrode,
- wherein the negative electrode includes an active carbon having a pore, and
- the second molecular sieve is the pore having an average pore radius that allows intrusion of the cation and suppresses intrusion of the anion.
An electrical double layer capacitor, comprising:
- a case;
- an electrolyte containing a cation and an anion, which is stored in the case;
- a positive electrode and a negative electrode stored in the case;
- and
- a second molecular sieve suppressing adsorption of the anion onto a surface of the negative electrode,
- wherein the negative electrode includes a second coat which has a pore and coats the surface of the negative electrode, and
- the second molecular sieve is the pore having an average pore radius that allows passing of the cation and suppresses passing of the anion.
Dependencies are inferred from the claim text.