Electric double layer capacitor, lithium ion capacitor and manufacturing method thereof

A method for manufacturing a double layer capacitor device comprising the steps of:

• preparing a pair of metal materials each comprising a first metal and a second metal;
• removing the first metal from at least one of the pair of metal materials in an etching material to form a porous structure;
• providing an electrolyte between the pair of metal materials;
• wherein a surface area per volume of the porous structure is greater than or equal to 100 m2/cm3.

A method for manufacturing a double layer capacitor device comprising the steps of:

• preparing a pair of metal materials each comprising a first metal and at least one of copper (Cu), silver (Ag), platinum (Pt), gold (Au), chromium (Cr), iron (Fe), lead (Pb), nickel (Ni), and molybdenum (Mo);
• removing the first metal from at least one of the pair of metal materials in an etching material to form a porous structure;
• providing an electrolyte between the pair of metal materials;
• wherein a surface area per volume of the porous structure is greater than or equal to 100 m2/cm3.

A method for manufacturing a lithium ion capacitor comprising the steps of:

• preparing a pair of metal materials each comprising a first metal and a second metal;
• removing the second metal from at least one of the pair of metal materials in an etching material to form a porous structure;
• forming a positive active material layer over one of the pair of metal materials;
• forming a negative active material layer over the other of the pair of metal materials;
• providing an electrolyte between the pair of metal materials;
• wherein a surface area per volume of the porous structure is greater than or equal to 100 m2/cm3.

A method for manufacturing a lithium ion capacitor comprising the steps of:

• preparing a pair of metal materials each comprising a first metal and at least one of copper (Cu), silver (Ag), platinum (Pt), gold (Au), chromium (Cr), iron (Fe), lead (Pb), nickel (Ni), and molybdenum (Mo);
• removing the first metal from at least one of the pair of metal materials in an etching material to form a porous structure;
• forming a positive active material layer over one of the pair of metal materials;
• forming a negative active material layer over the other of the pair of metal materials
• providing an electrolyte between the pair of metal materials;
• wherein a surface area per volume of the porous structure is greater than or equal to 100 m2/cm3.