Horizontal Lithium Electrodeposition on Atomically Polarized Monolayer Hexagonal Boron Nitride

초록

oth uncontrolled Li dendrite growth and corrosionare major obstacles to the practical application of Li-metal batteries.Despite numerous attempts to address these challenges, effectivesolutions for dendrite-free reversible Li electrodeposition haveremained elusive. Here, we demonstrate the horizontal Li electro-deposition on top of atomically polarized monolayer hexagonalboron nitride (hBN). Theoretical investigations revealed that thehexagonal lattice configuration and polarity of the monolayer hBN,devoid of dangling bonds, reduced the energy barrier for the surfacediffusion of Li, thus facilitating reversible in-plane Li growth.Moreover, the single-atom-thick hBN deposited on a Cu currentcollector (monolayer hBN/Cu) facilitated the formation of aninorganic-rich, homogeneous solid electrolyte interphase layer,which enabled the uniform Li+ flux and suppressed Li corrosion. Consequently, Li-metal and anode-free full cells containingthe monolayer hBN/Cu exhibited improved rate performance and cycle life. This study suggests that the monolayer hBN is apromising class of underlying seed layers to enable dendrite- and corrosion-free, horizontal Li electrodeposition forsustainable Li-metal anodes in next-generation batteries

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