Electrolytic capacitor and method for manufacturing same
View Patent ↗An electrolytic capacitor includes an anode body having a dielectric layer on a surface of the anode body, a cathode body, and an electrolytic solution interposed between the anode body and the cathode body. The electrolytic solution contains a first ester compound and a second ester compound. The first ester compound is a condensate of boric acid and a sugar alcohol. The second ester compound contains at least one condensate selected from the group consisting of a condensate of boric acid and a monool compound and a condensate of boric acid and a polyol compound excluding a sugar alcohol.
1. An electrolytic capacitor comprising:
an anode body having a dielectric layer on a surface of the anode body;
a cathode body; and
an electrolytic solution interposed between the anode body and the cathode body,
wherein:
the electrolytic solution contains a first ester compound and a second ester compound, the first ester compound being a condensate of boric acid and a sugar alcohol, and
the second ester compound contains at least one condensate selected from the group consisting of a condensate of boric acid and a monool compound and a condensate of boric acid and a polyol compound excluding a sugar alcohol.
2. The electrolytic capacitor according to claim 1 , wherein the sugar alcohol for forming the first ester compound is mannitol.
3. The electrolytic capacitor according to claim 1 , wherein the monool compound is polyalkylene glycol monoalkyl ether.
4. The electrolytic capacitor according to claim 1 , wherein the polyol compound is polyalkylene glycol.
5. The electrolytic capacitor according to claim 1 , wherein the electrolytic solution contains at least one hydrolysate selected from the group consisting of a hydrolysate of the first ester compound and a hydrolysate of the second ester compound.
6. The electrolytic capacitor according to claim 1 , wherein a content proportion of water in the electrolytic solution is 3% by mass or less.