Nippon Chemi-Con has been granted a patent for a hybrid solid electrolytic capacitor designed to resist corrosive reactions from chlorine ions while maintaining product integrity. The capacitor features a unique electrolyte layer combining a solid electrolyte with a sulfolane-based solution, enhancing its performance and durability. GlobalData’s report on Nippon Chemi-Con gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Nippon Chemi-Con, Hydrogen storage alloys was a key innovation area identified from patents. Nippon Chemi-Con's grant share as of July 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
The patent US12057276B2 describes a solid electrolytic capacitor that features a unique construction comprising an anode foil and a cathode foil, with an electrolyte layer integrated within the capacitor element. This electrolyte layer consists of a solid electrolyte that incorporates a dopant and a conjugated polymer, along with an electrolyte solution that fills the air gaps in the capacitor. Notably, the electrolyte layer contains a cation component present at a molecular ratio exceeding 0 and up to 6 relative to 1 mol of a functional group that facilitates the doping reaction of the dopant. The electrolyte solution is characterized by the inclusion of a sulfolane-based solvent.
Further claims detail specific components of the electrolyte layer, including the presence of an aliphatic carboxylic acid with a carbon chain of four or more as an anion component. The patent specifies that the cation component can be included at a molecular ratio of 3.5 or less, with azelaic acid being a potential example of the aliphatic carboxylic acid. Additionally, the claims outline that the anion component may be present in equimolar amounts to the cation component. The electrolytic solution may also contain ethylene glycol alongside the sulfolane-based solvent, with a recommended mixing ratio of at least 25 wt % for the sulfolane-based solvent. The patent further identifies specific sulfolane-based solvents and mentions the inclusion of sorbitol in the solid electrolyte layer, providing a comprehensive overview of the capacitor's composition and structure.
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