Electric double layer capacitor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsSusumu Nomoto, Masakazu Tanahashi, Mikinari Shimada, Emiko Igaki
Life of this patent
Estimating the term…
Abstract
An electric double layer capacitor of the present invention comprises a capacitor element and an electrolyte arranged in a case sealed with a sealer, and further comprises in the case a solid buffer for suppressing fluctuation in pH of the electrolyte. The solid buffer includes a compound selected from an oxide and a hydroxide. An element contained in the compound is at least one selected from the group consisting of Be, Al, Si, Sc, V, Cr, Fe, Ni, Cu, Zn, Ga, Ge, Y, Zr, Mo, Ag, Cd, In, Te, La, Ce, Pr, Nd, Pm, Gd, Dy, Ho, Er, Tm, Lu, W and Pb.
Claims10
An electric double layer capacitor comprising a sealing member, an electrolyte and an electric double layer capacitor element both of which are sealed in the sealing member,
- the electric double layer capacitor further comprising a solid buffer arranged in the sealing member, wherein the solid buffer suppresses fluctuation in pH of the electrolyte.
Dependencies are inferred from the claim text.