Nippon Chemi-Con. has filed a patent for an electric double layer capacitor designed to minimize gas generation and extend lifespan. The capacitor includes electrodes with activated carbon and an electrolytic solution with a specific formula to achieve this goal. The key parameter, index D, must be 2.5 or less for optimal performance. 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 January 2024 was 28%. Grant share is based on the ratio of number of grants to total number of patents.

Electric double layer capacitor with activated carbon electrodes

Source: United States Patent and Trademark Office (USPTO). Credit: Nippon Chemi-Con Corp

The patent application (Publication Number: US20240038454A1) discloses an electric double layer capacitor with specific components and characteristics. The capacitor includes a positive electrode, a negative electrode with an activated carbon polarizable layer containing a surface functional group, and an electrolytic solution comprising an aprotic solvent and a quaternary ammonium salt. The key feature of this capacitor is the value of an index D, calculated using a specific formula provided in the claims, which must be 2.5 or less for the capacitor to meet the requirements.

Furthermore, the patent claims specify the types of aprotic solvents and quaternary ammonium salts that can be used in the electric double layer capacitor. The aprotic solvent can be a lactone compound like ?-butyrolactone or a carbonate compound such as propylene carbonate. Similarly, the quaternary ammonium salt can be diethykmethylammonium salt, methylethylpyrrolidinium salt, or triethylmethylammonium salt. These specific combinations of components aim to enhance the performance and efficiency of the electric double layer capacitor, as outlined in the patent claims.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.