Electrode for cell of energy storage device and method of forming the same
View Patent ↗A method of the present invention is used for the high-rate deposition of materials, such as carbon, silicon, metals, metal oxides, and the like, onto a metal substrate defined by a metal current collector. The particles of the material are mixed with fluid and are injected against the metal tape at high pressure and high velocity. The particles of the material form an active layer of the metal current collector. The metal current collector is used as a cathode or anode combined with a separator to form a cell of a secondary battery, metal-ceramic membranes, film composite metal-ceramic materials for electronic devices.
1. A cell having a first electrode and a second electrode for producing electric power comprising:
a metal current collector for at least one of the first and second electrodes presenting opposed sides; and
an active core formed inside said metal current collector from first particles being integral with and extending from said metal current collector and second particles connecting with said first particles thereby forming a porous structure of said active core inside said metal current collector, wherein said first particles are further defined by accreted and crystallized drops of said metal of said metal current collector.
2. A cell as set forth in claim 1 wherein said second particles and said metal current collector define points of contact, said points of contact have a thermal decomposition temperature being lower than a melting temperature of said first particles.
3. A cell as set forth in claim 2 wherein said second particles present a size ranging from at least 50 nm and up to 500 nm and said first particles present a size ranging from at least 5 nm and up to 100 nm.
4. A cell as set forth in claim 3 wherein said pores defined by said grid are in the range of up to 60% of a volume of said active core.
5. A cell as set forth in claim 4 wherein said second particles are further defined by silicon, carbon, germanium, oxides, salts, ceramic components and combination thereof.
6. A cell as set forth in claim 3 wherein said grid is formed as a result of said second particle impacting said metal current collector resulting in local increased temperature of said metal current collector and formation of aerosol drops in response to said increased temperature, local melting and ultrasonic cavitation of said metal current collector and solidification of said aerosol drops thereby forming said first particles.