Honda Motor has been granted a patent for a negative electrode design for nonaqueous electrolyte secondary batteries. The electrode features a porous metal current collector that absorbs expansion and contraction of a silicon-based active material, improving cycle characteristics. The design includes specific materials and dimensions for optimal performance. GlobalData’s report on Honda Motor 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 Honda Motor, Hydrogen fuel cells was a key innovation area identified from patents. Honda Motor's grant share as of April 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Negative electrode for nonaqueous electrolyte secondary batteries with silicon-based material
A recently granted patent (Publication Number: US11973210B2) discloses a negative electrode design for nonaqueous electrolyte secondary batteries. The electrode features a current collector made of porous metal, with a negative electrode material containing a silicon-based material, a skeleton forming agent comprising a silicate with a siloxane bond, a conductive additive, a binder, and a fibrous material. The porous metal has an average pore diameter of 500 µm or less, and the fibrous material includes cellulose nanofiber, vapor grown carbon nanofiber, or carbon nanotube within specific fiber diameter and length ranges. The negative electrode material is fixed in nano and micron size regions by the skeleton forming agent and porous metal, respectively.
Furthermore, the patent claims specify various aspect ratios for the fibrous materials used in the negative electrode, such as 2.5 to 5000 for cellulose nanofiber, 2 to 100 for vapor grown carbon nanofiber, and 2.5 to 5000 for carbon nanotube. The skeleton forming agent in the electrode comprises a silicate represented by a specific general formula, with A representing an alkali metal and n ranging from 1.6 to 3.9. Additionally, the porous metal in the electrode design is described as a foamed metal. The patent also extends to a nonaqueous electrolyte secondary battery incorporating the innovative negative electrode design, showcasing potential advancements in battery technology.
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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.
