High-capacity anode materials have the ability to provide Lithium-ion batteries with higher capacities and longer life cycles. Major Lithium-ion battery manufacturers, as well as companies selling consumer
electronics and hybrid electric vehicles, would benefit from this technology.
anodes, such as silicon and tin, are gaining popularity in rechargeable Lithium-ion
batteries, but their rate capabilities have so far been poorer than graphite
and many oxide electrodes. Theoretically, Aluminum should be an attractive
anode material for rechargeable Lithium-ion batteries due to its low cost, high
capacity, low potential plateau, and high electrical conductivity; however, the
practical performance falls short of the theoretical promise. This invention improves current technology by creating an Aluminum-based core surrounded by a tunable interspace to achieve 10C charge/discharge
rate with reversible capacity exceeding 650 mAh/g even after 500 cycles.
The technology makes use of a yolk-shell nanocomposite of aluminum core and a TiO2 shell, with a tunable interspace, to achieve a longer lasting and ultrahigh capacity Lithium-ion battery. The yolk-shell nanocomposite particles feature a void between the shell and the core, which allows for the expansion and shrinkage of the core during the charging and discharging phases. An inert TiO2 shell conducts both Li+ and electrons and even if the yolk pulverizes, all of the active content will still remain confined in the closed shell and will not lose electrical contact. The manufacturing process is a one-pot synthesis method that gives specific capacities at an industrial scale.
- Industrially scalable
- Only uses Earth-abundant elements