1 research outputs found
Dendrite-Free Lithium Deposition for Lithium Metal Anodes with Interconnected Microsphere Protection
A lithium
(Li) metal anode is required to achieve a high-energy-density
battery, but because of an undesirable growth of Li dendrites, it
still has safety and cyclability issues. In this study, we have developed
a microsphere-protected (MSP) Li metal anode to suppress the growth
of Li dendrites. Microspheres could guide Li ions to selective areas
and pressurize dendrites during their growth. Interconnections between
microspheres improved the pressurization. By using an MSP Li metal
anode in a 200 mAh pouch-type Li/NCA full cell at 4.2 V, dendrite-free
Li deposits with a density of 0.4 g/cm<sup>3</sup>, which is 3 times
greater than that in the case of bare Li metal, were obtained after
charging at 2.9 mAh/cm<sup>2</sup>. The MSP Li metal enhanced the
cyclability to 190 cycles with a criterion of 90% capacity retention
of the initial discharge capacity at a current density of 1.45 mA/cm<sup>2</sup>