Toward Dendrite-Free Lithium Deposition via Structural and Interfacial Synergistic Effects of 3D Graphene@Ni Scaffold

Abstract

Owing to its ultrahigh specific capacity and low electrochemical potential, lithium (Li) metal is regarded as one of the most attractive anode materials for next-generation lithium batteries. Nevertheless, the commercialization of Li-metal-based rechargeable batteries (LiMBs) has been retarded by the uncontrollable growth of Li dendrites, as well as the resulting poor cycle stability and safety hazards. In this work, a 3D graphene@Ni scaffold has been proposed to accomplish dendrite-free Li deposition via structural and interfacial synergistic effects. Due to the intrinsic high surface area used to reduce the effective electrode current density and the surface-coated graphene working as an artificial protection layer to provide high cycle stability as well as suppress the growth of Li dendrites, the Coulombic efficiencies of Li deposition on 3D graphene@Ni foam after 100 cycles can be sustained as high as 96, 98, and 92% at the current densities of 0.25, 0.5, and 1.0 mA cm, respectively, which shows more excellent cycle stability than that of its planar Cu foil and bare Ni foam counterparts. The results obtained here demonstrate that the comprehensive consideration of multiaspect factors could be more help to enhance the performance of Li metal anode so as to achieve its real application in next-generation LiMBs.

Superior Potassium Ion Storage via Vertical MoS2 “Nano‐Rose” with Expanded Interlayers on Graphene

“…Furthermore, the intensity of A 1g mode is much higher than the E 1 2g mode, revealing that the petal‐like MoS 2 nanosheets in MoS 2 @rGO composite consist of very few number of S–Mo–S layers, and own numerous edge‐terminated structures, which are also favorable for their electrochemical performances (Figure S2, Supporting Information). Additionally, the peaks at 1352 and 1594 cm −1 are the characteristic peaks of the D and G bands from rGO . As we discussed before, interfacial features between the two components in the MoS 2 @rGO composite is another key to obtain good electrochemical performances.…”

Advanced Micro/Nanostructures for Lithium Metal Anodes

“…a 3D graphene@Ni scaffold50 and carbon nanofiber networks51) have also applied to accomplish dendrite‐free Li plating without dendrite formation.…”

N‐Doped Graphdiyne Coating for Dendrite‐Free Lithium Metal Batteries

“…Among them, 3D current collectors (Cu, Ni, etc.) with high surface area and large void structures can effectively reduce the local current density, relieve the volume change, and delay the dendritic growth rate of the Li . Therefore, to suppress the dendric growth and improve the performance of the device, one promising method is to distribute uniform lithiophilic epicenters on the 3D current collector for regulating the Li nucleation in the deposition process.…”