Ultrasonic synthetic method is used to prepare various nano-porous (nanofoam) metal current collectors, including, but not limited to, copper metal for anode and aluminum/nickel metal for cathode. The innovative nanofoam metal current collectors are used to prepare high performance lithium ion (Li-ion) battery, which shows good capacity retention and cycling stability even under fast charge/discharge rates. It is easy to be industrialized and can improve rapid charge/discharge rates and electrochemical capacity retention of Li-ion battery.
The method to generate nanofoam metal current collectors combines the advantages of ultrasonic chemistry and etching process.
Li-ion battery assembled with the nanofoam metal current collector showed significant improvement in capacity retention and cycling stability under fast charge/discharge rates in comparison to batteries made with traditional current collectors. Capacity loss in Li-ion batteries were measured after 500 cycles of charge/discharge. Results show that the battery prepared with the nanofoam current collectors performed better at 10.1%, as compared to two commonly used commercial batteries, which performed at 19.9% and 22.5%. It is believed that this method can open more opportunities for developing electronic devices and mobile vehicles.
The innovative nanofoam metal current collectors can be used in high performance Li-ion battery for power sources in electrical energy storage devices and electrical vehicles for its fast charge/discharge rates and electrochemical capacity retention capabilities. The nanofoam metal can also be used as high surface area catalyst support for more applications.
The technology can be adapted to meet various market opportunities, such as high performance lithium ion battery, chemical industry, etc.