Toward High-Performance Li Metal Anode via Difunctional Protecting Layer

Abstract

Li-metal batteries are the preferred candidates for the next-generation energy storage, due to the lowest electrode potential and high capacity of Li anode. However, the dangerous Li dendrites and serious interface reaction hinder its practical application. In this work, we construct a difunctional protecting layer on the surface of the Li anode (the AgNO 3 -modified Li anode, AMLA) for Li-S batteries. This stable protecting layer can hinder the corrosion reaction with intermediate polysulfides (Li 2 S x , 4 ≤ x ≤ 8) and suppress the Li dendrites by regulating Li metal nucleation and depositing Li under the layer uniformly. The AMLA can cycle more than 50 h at 5 mA cm −2 with the steady overpotential of lower than 0.2 V and show high capacity of 666.7 mAh g −1 even after 500 cycles at 0.8375 mA cm −2 in Li-S cell. This work makes great contribution to the protection of the Li anode and further promotes the practical application.

Designing 3D Anode Based on Pore‐Size‐Dependent Li Deposition Behavior for Reversible Li‐Free All‐Solid‐State Batteries

“…[ 14 , 21 ] In addition, the high Li ion diffusion coefficient of lithiated carbon and Li‐Ag alloy could facilitate further Li ion reduction within the pores of 3D anode, and thus, Li deposition can occur within the porous 3D Ni anode. [ 22 ] Indeed, the Li‐ion diffusion coefficient of lithiated C and Li‐Ag alloy is considerably higher than those of the bulk Li metal (1 × 10 −8 cm 2 s −1 for LiC 6 and Li‐Ag and 5.6 × 10 −11 cm 2 s −1 for Li). [ 14 , 23 ] SE is the exclusive Li ion pathway within the cell with a bare Ni anode; however, the lithiated C and Li‐Ag alloy in Ni_C_Ag anode could transfer Li‐ion within the porous anode and facilitate the electrochemical reduction of Li‐ion within the anode, which suppresses the separation of the anode/SE interface.…”

Improved electrochemical performance of solid-state lithium metal batteries with stable SEI and CEI layers via in situ formation technique

“…Thus, the morphological and mechanical advantages of the corresponding freestanding membrane signicantly suppressed the growth kinetics of Li dendrites and improved the interfacial stability with the LMA. 13,36 Furthermore, we evaluated the morphological behavior of the SHSE0, SHSE1, bLi, and mLi symmetric cell parts cycled at 0.2 mA cm −2 , as shown in Fig. 5(a)-(f).…”

Clarification of Li deposition behavior on anodes with a porous interlayer in Li-free all-solid-state batteries

“…Ag forms an alloy with Li and is soluble in Li (9 at%@145.5 C). 34,35 The Ag-decorated carbon spheres were synthesized by the carbonization of Agdecorated polymer spheres (for more detail, see the Methods section). TEM images (Fig.…”