Thus, new means to suppress dendrite formation will provide additional approaches to improve the performance of Li-metal anode.
As a key component of the anode, the current collector could also have a significant influence on the Li anode.
However, the growth of Li dendrites during electrochemical deposition, which leads to a low Coulombic efficiency and safety concerns, has long hindered the application of rechargeable Li-metal batteries.
Here we show that a 3D current collector with a submicron skeleton and high electroactive surface area can significantly improve the electrochemical deposition behaviour of Li.
However, the use of Li metal as anode faces several hurdles.
With the growth of Li dendrites being effectively suppressed, the Li anode in the 3D current collector can run for 600 h without short circuit and exhibits low voltage hysteresis.Most of the current collectors used in the Li batteries are planar, such as conventional Cu and Li foils.The initial plating of Li on planar current collector is prone to inhomogeneous Li particle deposition, followed by the growth of Li dendrites on the Li particles.We are coming to an age beyond Li-ion batteries, in which advanced energy storage systems are necessary. The persistent challenge is the formation of dendritic Li during Li plating, which would lead to low Coulombic efficiency, short cycle life, internal short circuits and even catastrophic cell failure (ref.29), have been explored to restrain dendrite formation and reinforce protection for the Li surface.